In recent years,the replacement of retired coal-fired power plants with nuclear power plants(also known as coal-to-nuclear conversion,C2N)has been considered a particularly cost-effective solution for power system dec...In recent years,the replacement of retired coal-fired power plants with nuclear power plants(also known as coal-to-nuclear conversion,C2N)has been considered a particularly cost-effective solution for power system decarbonization amid global climate change mitigation goals.In this study,we improved a power system model of China equipped with provincial spatial resolution.Specifically,we expanded the classification of nuclear technologies from one to four types,based on generation and reactor design,and incorporated relevant C2N conversion constraints.This improvement allows quantification of C2N’s potential role in decarbonizing China’s power system,following the identification of its maximum conversion potential.The results indicate that by utilizing conventional site resources in both coastal and inland China,a major growth of nuclear capacity is possible under China’s carbon peaking and neutrality goals,reaching 422 GW by 2060,with 42%of this capacity being small modular reactors that offer greater operational flexibility.In 2060,nuclear power will become an important source of electricity generation in China,accounting for 18%of total supply.Site resource availability represents a major constraint to this development:Expanding site availability through C2N has the potential to further increase nuclear capacity in 2060 by 13%-23%,while raising nuclear’s share of total electricity supply that year by 2-4 percentage points.Expanding nuclear energy’s share in China’s decarbonization via C2N will yield cost savings of 0.22%-0.69%of system cost from 2030 to 2060.展开更多
In the first five months of2026,the total trade volume between China and ASEAN reached 3.52 trillion yuan(US$502.5 billion),up 16.6percent year on year.Thanks to dividends from the 3.0version of the China-ASEAN Free T...In the first five months of2026,the total trade volume between China and ASEAN reached 3.52 trillion yuan(US$502.5 billion),up 16.6percent year on year.Thanks to dividends from the 3.0version of the China-ASEAN Free Trade Agreement(CAFTA 3.0),over 90 percent of tariff items within the region now enjoy zero tariffs.Cooperation between the two sides is accelerating onto new tracks of green trade,digital trade,and trade in services.展开更多
Driven by the stringent decarbonization regulations increasingly imposed on the global shipping industry,green methanol has emerged as the alternative fuel with the greatest first-mover advantage in the current market...Driven by the stringent decarbonization regulations increasingly imposed on the global shipping industry,green methanol has emerged as the alternative fuel with the greatest first-mover advantage in the current market.This article systematically reviews international trends in green fuel policy,the market landscape,and development bottlenecks.It compares three mainstream technology pathways:biomass gasification,green electricitybased hydrogen production coupled with CO2,and conventional units coupled with biomass,with a focus on analyzing their technological maturity,carbon emission intensity,and economic efficiency.Using CM Energy as a case study,this paper demonstrates the strategic value of the“coal-based coupled biomass carbon co-production”pathway as a pragmatic solution for the current stage of development,and proposes recommendations for a phased industrial deployment.展开更多
As one of the world's primary sources of carbon emissions,the building sector's decarbonization progress directly affects the realization of"dual carbon"goals.Based on life cycle theory,this paper sy...As one of the world's primary sources of carbon emissions,the building sector's decarbonization progress directly affects the realization of"dual carbon"goals.Based on life cycle theory,this paper systematically analyzes the technical logic and limitations of carbon emission accounting methods for buildings,and elaborates on innovative pathways for green building decarbonization technologies,including passive design,active energy systems,and BIM-based digitalization.The Technology Acceptance Model(TAM)and a tripartite evolutionary game framework are introduced to analyze the barriers and driving mechanisms for technology diffusion from a socio-technical perspective.Using practical cases from China Construction Science and Technology Group Co.,Ltd.(CSCSTC),the paper quantifies emission reduction performance.Finally,a coordinated implementation framework integrating policy regulation,technological innovation,and market incentives is proposed.Results show that combining Life Cycle Assessment(LCA)with the emission factor method can improve accounting accuracy by over 3O%;integrating passive design and renewable energy technologies reduces building energy consumption by 5O-64%;and scaled application of the"Photovoltaics+Energy storage+Direct current+Flexibility"(PEDF)system achieves renewable energy selfconsumption rates above 80%.Furthermore,modular construction reduces carbon emissions from the construction phase by 3O%,while green financial instruments such as preferential loans can raise project internal rates of return(IRR)by approximately 2-3 percentage points.This study provides theoretical support and practical guidance for low-carbon transition in the building industry.展开更多
The accelerated decline of Arctic sea ice since the 1980s has paradoxically amplified greenhouse gas(GHG)emissions through increased shipping activities in this ecologically vulnerable region.This study investigates h...The accelerated decline of Arctic sea ice since the 1980s has paradoxically amplified greenhouse gas(GHG)emissions through increased shipping activities in this ecologically vulnerable region.This study investigates how to reconcile the decarbonization of Arctic shipping with conflicting environmental,economic,and geopolitical interests.Through systematic literature review and interest-balancing analysis,our findings identify three systemic barriers:(1)inadequate adaptation of International Maritime Organization(IMO)regulations to Arctic-specific environmental risks,(2)fragmented enforcement mechanisms among Arctic and non-Arctic States,and(3)technological limitations in clean fuel adoption for ice-class vessels.To address these challenges,a tripartite governance framework is proposed.First,legally binding amendments to International Convention for the Prevention of Pollution from Ships(MARPOL)Annex VI introducing Arctic-specific Energy Efficiency eXisting ship Index(EEXI)standards and extending energy efficiency regulations to fishing vessels.Second,a phased fuel transition prioritizing liquefied natural gas(LNG)and methanol,followed by hydrogen-ammonia synthetics.Third,enhanced multilateral cooperation through an Arctic Climate Shipping Alliance to coordinate joint research and development in cold-adapted technologies and ice-route optimization.By integrating United Nations Convention on the Law of the Sea(UNCLOS)obligations with IMO Polar Code implementation,this study advances a dynamic interest-balancing framework for policymakers,offering actionable pathways to achieve Paris Agreement targets while safeguarding Arctic ecosystems.展开更多
The contamination of wastewater with organic pollutants and nitrogen compounds poses significant environmental challenges.The primary objective of wastewater treatment is the simultaneous denitrification and decarboni...The contamination of wastewater with organic pollutants and nitrogen compounds poses significant environmental challenges.The primary objective of wastewater treatment is the simultaneous denitrification and decarbonization of ammonia nitrogen and organics into harmless by-products.This study presents a novel method for the directional generation of chlorine radical species like·ClO and·Cl using electro-reactive membranes(EMs)known as RuO2@PbO2-M,which were fabricated using an electro-deposition coupled template approach.This method facilitates the rapid and efficient conversion of ammonia to nitrogen and concurrently reduces the chemical oxygen demand in the effluent.Our system achieved ultra-efficient simultaneous denitrification and decarbonization with minimal energy consumption in single-filtration mode,thereby eliminating the need for chemical precursors.We elucidate the formation pathway of·ClO and·Cl during the electrochemical oxidation process involving RuO2@PbO2-M,where·Cl generated from RuO2reacts with·OH from PbO2under hypochlorous acid conditions,thereby enhancing nitrogen and carbon removal.These findings highlight a novel electro-filtration and an innovative reactive membrane design for·ClO synthesis,which provides a new research framework for the concurrent removal of nitrogen and carbon,and offers a promising solution to enhance wastewater treatment efficiency.展开更多
Developing low-carbon and efficient power systems is critical for energy security in the global warming context.We address this issue by focusing on the productivity impact of a decarbonization policy in China’s ther...Developing low-carbon and efficient power systems is critical for energy security in the global warming context.We address this issue by focusing on the productivity impact of a decarbonization policy in China’s thermal power sector—namely,the“Constructing Large Units and Restricting Small Ones”(CLRS)initiative.Utilizing a resource misallocation model,we construct a new theoretical framework to distinguish between technical and allocative efficiency and analyze productivity using plant-level data.The results indicate that the CLRS policy has significantly improved the allocative and technical efficiency of China’s coal-fired power sector,thereby ensuring power security.The closure of outdated and highly distorted small coal-fired units,which have been replaced by technologically advanced large units,primarily drives the enhanced efficiency.The policy’s effects are most pronounced in large-scale power plants and those with high coal combustion efficiency.Furthermore,a comparison of power plants’productivity distribution before and after policy implementation reveals that the CLRS policy not only enhances capital productivity in the coal-fired power sector but also increases rational labor allocation.Our findings have important policy implications for developing countries vis-à-vis building efficient and stable power systems amid climate change.展开更多
This study investigates the disparities in the deployment of photovoltaic(PV)technology for carbon emissions reduction across different nations,highlighting the mismatch between countries with high economic capacity a...This study investigates the disparities in the deployment of photovoltaic(PV)technology for carbon emissions reduction across different nations,highlighting the mismatch between countries with high economic capacity and those where PV installation would maximize global decarbonization benefits.This mismatch is discussed based on three key factors influencing decarbonization via PV technology:per capita gross domestic product;carbon intensity of the energy system;and solar resource availability.Current PV deployment is predominantly concentrated in economically advanced countries,and does not coincide with regions where the environmental and economic impact of such installations would be most significant.Through a series of thought experiments,it is demonstrated how alternative prioritization strategies could significantly reduce global carbon emissions.Argument is put forward for a globally coordinated approach to PV deployment,particularly targeting high-impact sunbelt regions,to enhance the efficacy of decarbonization efforts and promote equitable energy access.The study underscores the need for international policies that support sustainable energy transitions in economically less developed regions through workforce development and assistance with the activation of capital.展开更多
The aqueous fluids within subducted slabs have the potential to influence the form of carbonate presence and the carbon cycling process.Experiments were performed on resistive heating diamond anvil cell using siderite...The aqueous fluids within subducted slabs have the potential to influence the form of carbonate presence and the carbon cycling process.Experiments were performed on resistive heating diamond anvil cell using siderite crystals and grains with water under conditions of pressure as high as 11.4 GPa and temperatures reaching up to 530℃.These experiments aimed to simulate geological reactions that may occur within a depth range of 340 km in subducted slabs.Raman spectroscopy was employed to monitor the reactions and microscale phenomena within the sample chamber as pressure and temperature increase.The recovered products were analyzed using scanning electron microscopy and transmission electron microscopy.The results indicate that at 0.8 GPa and 108℃,a Fischer-Tropsch Type(FTT)reaction occurred on the sample surface,resulting in the formation of organic compound formaldehyde,followed by the observation of formic acid.At higher pressure and temperature(3.5 GPa,420℃),the formation ofγ-Fe2O3andγ-FeOOH was observed on the sample surface,accompanied by the release of CO2and H2.Transmission electron microscope analysis of the quenched product powders indicated that the generated iron oxides were consistent with the phases observed at high pressure and temperature conditions.High pressure and temperature dissolution experiments of siderite in water reveal that carbon may be released into the mantle wedge entirely in the form of CO2in warm subducted slabs and cold subducted slabs that subduct to depths of 75 km.The released CO2participates in the carbon cycle of the island arc volcanic systems in the upper mantle at depths of 70-120 km and accelerates the transfer of subducted carbon to the Earth’s surface.展开更多
On the basis of understanding the principle of rotary triboelectrostatic separation, dynamic analysis of charged fly ash particles aimed at determining the key factors and separation experiments to improve decarboniza...On the basis of understanding the principle of rotary triboelectrostatic separation, dynamic analysis of charged fly ash particles aimed at determining the key factors and separation experiments to improve decarbonization efficiency had been carried out Variables of electrode plate voltage and corrected wind speed are the key factors which affect the decarbonization efficiency on the separation of fly ash, The results of separation experiments show that:(1) With the plate voltage increasing, the efficiency of decarbonization continuously rises and in its selected range, the optimal voltage level is 45 KV;(2) The corrected wind speed can impact the efficiency of decarbonization significantly: with the speed increasing, the efficiency of decarbonization shows a trend of first decline, then increase and decrease again, and in its selected range, the optimal speed is 2.0 m/s. This study is of significance for the improvement of rotary triboelectrostatic separation performance and its decarbonization separation efficiency.展开更多
The basic principle of fly ash triboelectrification is analysed. The mineral electrical index and test method are introduced. The electric difference of different mineral composition of fly ash is discussed by analysi...The basic principle of fly ash triboelectrification is analysed. The mineral electrical index and test method are introduced. The electric difference of different mineral composition of fly ash is discussed by analysis of chemical and mineral composition of fly ash in Xinwen power plant. The dielectric constant and charge-mass ratio of carbon and ash of fly ash are tested. Combined with the experimental study on rotary triboelectrostatic separation, the charged characteristic of fly ash particles with different size is gained. The results show that the dielectric constant of fly ash with different grain size decreased with the decrease of particle size, which lead to the poor electrical conductivity, Thus it can be seen that par- ticle size plays a leading role in conductivity, The charge of carbon and ash with each size increased with the decreased of particle size; and the charge-mass ratio between carbon and ash with the same size lar- ger with the decrease of size, which indicated that the finer particle size, the more favorable for triboelec- trification separation. In the same conditions, the best decarburization effect is realized when the particle size ranges from 0.038 to 0.074 ram, whose decarbonization rate and efficiency index reached 38.93% and 120.83% respectively.展开更多
Climate change is becoming an important issue in all fields of infrastructure development.Electricity plays a core role in the decarbonized energy system’s path to a regional zero-emission pattern.A well-built trans-...Climate change is becoming an important issue in all fields of infrastructure development.Electricity plays a core role in the decarbonized energy system’s path to a regional zero-emission pattern.A well-built trans-Mediterranean backbone grid can hedge the profound evolution of regional power generation,transmission,and consumption.To date,only Turkey and the Maghreb countries(i.e.,Morocco,Algeria,and Tunisia)are connected with the Continental European Synchronous Area.Other south-and east-shore countries have insufficient interconnection infrastructures and synchronization difficulties that have proven to be major hurdles to the implementation of large-scale solar and wind projects and achievement of climate goals.This study analyzes the current trans-boundary grid interconnections and power and carbon emission portfolios in the Mediterranean region.To align with the recently launched new climate target‘Fit for 55’program and the accelerated large-scale renewables target,a holistic review of projected trans-Mediterranean grids and their market,technical,and financial obstacles of implementation was conducted.For south-and east-shore countries,major legal and regulatory barriers encompassing non-liberalized market structure,regulation gaps of taxation and transmission tariffs,and the private sector’s access rights need to be removed.Enhancement of domestic grids,substations,and harmonized grid codes and frequency,voltage,and communication technology standards among all trans-Mediterranean countries are physical prerequisites for implementing the Trans-Mediterranean Electricity Market.In addition,the mobilization of capital instruments along with private and international investments is indispensable for the realization of supranational transmission projects.As the final section of the decarbonization roadmap,the development of electric appliances,equipment,and vehicles with higher efficiency is inevitable in the decarbonized building,transportation,and industry sectors.展开更多
A crystalline sapphire (Al2O3) boule (Ф10 × 80mm^3) grown by the temperature gradient technique (TGT) is a bit colored due to carbon volatilization from the graphite heater at high temperatures and the abs...A crystalline sapphire (Al2O3) boule (Ф10 × 80mm^3) grown by the temperature gradient technique (TGT) is a bit colored due to carbon volatilization from the graphite heater at high temperatures and the absorption of transitional metal inclusions in the raw material. The sapphire becomes colorless and transparent after decolorization and decarbonization in successive annealings in air and hydrogen at high temperatures. The quality, optical transmissivity,and homogeneity of the sapphire are remarkably improved.展开更多
Decarbonization is a critical issue for peaking CO2 emissions of energy-intensive industries,such as the iron and steel industry.The decarbonization options of China’s ironmaking and steelmaking sector were discus...Decarbonization is a critical issue for peaking CO2 emissions of energy-intensive industries,such as the iron and steel industry.The decarbonization options of China’s ironmaking and steelmaking sector were discussed based on a systematic three-dimensional low-carbon analysis from the aspects of resource utilization(Y),energy utilization(Q),and energy cleanliness which is evaluated by a process general emission factor(PGEF)on all the related processes,including the current blast furnace(BF)-basic oxygen furnace(BOF)integrated process and the specific sub-processes,as well as the electric arc furnace(EAF)process,typical direct reduction(DR)process,and smelting reduction(SR)process.The study indicates that the three-dimensional aspects,particularly the energy structure,should be comprehensively considered to quantitatively evaluate the decarbonization road map based on novel technologies or processes.Promoting scrap utilization(improvement of Y)and the substitution of carbon-based energy(improvement of PGEF)in particular is critical.In terms of process scale,promoting the development of the scrap-based EAF or DR-EAF process is highly encouraged because of their lower PGEF.The three-dimensional method is expected to extend to other processes or industries,such as the cement production and thermal electricity generation industries.展开更多
Yanbei project of Schlumberger Copower Oilfield Engineering Co.,Ltd.-natural gas purification plant decarbonization unit is equipped with two sets of decarbonization systems(parallel operation).The two sets of systems...Yanbei project of Schlumberger Copower Oilfield Engineering Co.,Ltd.-natural gas purification plant decarbonization unit is equipped with two sets of decarbonization systems(parallel operation).The two sets of systems adopt two tower process,full lean liquid circulation regeneration process,one tower absorption(absorption pressure 5.4mpag),one tower regeneration(regeneration temperature 95℃-110℃),purified natural gas carbon dioxide content≤2.5vol%,single set The treatment capacity is 2300 KM3/d.This paper introduces the problems existing in the decarbonization solution of the decarbonization unit in the natural gas purification plant in recent three years,analyzes the causes of pollutants affecting the quality of the decarbonization solution,and probes into the control measures for the pollution of the decarbonization solution,so as to provide reference.展开更多
The maritime sector,responsible for around 2.9%of global greenhouse gas(GHG)emissions,is under increasing pressure to decarbonize towards the International Maritime Organization’s(IMO)2050 targets.A number of exisiti...The maritime sector,responsible for around 2.9%of global greenhouse gas(GHG)emissions,is under increasing pressure to decarbonize towards the International Maritime Organization’s(IMO)2050 targets.A number of exisiting reviews have summarized different aspects such as policy frameworks,alternative fuels,and ship technologies,yet few have examined the integrative role of data in advancing maritime decarbonization across these domains.This review establishes a four-pillar framework to capture how data-driven approaches are reshaping maritime decarbonization.It begins by analyzing emerging digital governance policies on the basis of conventional maritime policies.Second,it synthesizes the development of emission datasets,highlighting the indirect databases with direct real-time measurements such as unmanned aerial vehicle(UAV)and portable emission measurement systems(PEMS)monitoring.Third,it reviews methodological advancements in emission modeling,from empirical,economic,and hybrid models to machine learning-based approaches.Finally,it evaluates how these data and modeling advancements support coordinated decarbonization strategies across vessels,fuels,and ports,illustrating the growing role of datainformed decision-making in guiding systemic emission reductions throughout the maritime supply chain.This review links regulatory,data,modeling,and implementation perspectives through a data-centric perspective.By mapping research progress and identifying knowledge gaps across these four pillars,the review offers a structured foundation to support the acceleration of maritime decarbonization efforts.展开更多
Microwave is an efficient and clean energy input mode.It is easy to integrate into the chemical industry to promote electrification and assist in decarbonization.The important characteristic of microwave heating is th...Microwave is an efficient and clean energy input mode.It is easy to integrate into the chemical industry to promote electrification and assist in decarbonization.The important characteristic of microwave heating is that the entire process volume can be heated internally,while the components with high dielectric loss can be heated selectively and rapidly.Microwave heating initiates very different mechanisms from conventional thermal approaches and can lead to dramatically different results[1].In the background of the“Dual Carbon”goal,microwave technology has an enormous potential to be applied to various fields,mainly chemical engineering,the metallurgical industry and material synthesis.展开更多
An extensive literature review was conducted to investigate the pathways for the decarbonization and electrification of society and to cover different aspects to fulfill this objective.Despite the significant attracti...An extensive literature review was conducted to investigate the pathways for the decarbonization and electrification of society and to cover different aspects to fulfill this objective.Despite the significant attraction and critical demand for achieving net-zero emissions,challenges must be addressed by adjusting policies and regulations and setting investments and budgets with the contribution of all nations and individuals.In this study,we explored the mission and vision of electrification,the reduction of greenhouse gas emissions,the mitigation of global warming,and net-zero targets.We considered alternative scenarios and the COP28 outputs from near-term(2025–2030)and long-term strategies.With this objective in mind,we focused on the clean energy transition as the primary step for electrification.In the following section,we thoroughly reviewed the supplies and capacities of renewables,as well as projected and planned investments,with particular emphasis on hydropower,hydrogen,and other sources.The material demand,which is the main challenge hindering the on-time deployment of clean energy,was investigated.With increasing reliance on renewables,energy storage balances generation and consumption,particularly during peak hours and high-demand situations.Batteries,fuel cells,supercapacitors,and coupled energy conversion and storage were extensively discussed as the main storage devices in electric and hybrid energy storage systems.Finally,we investigated the electrification potential in daily life,from transportation via light-or heavy-duty vehicles to electric aviation,electronic devices,buildings,industrial processes,and smart grids.This framework comprehensively assesses and reviews recently employed strategies for electrification to ensure sustainability and reliability over the coming years.展开更多
Since the outbreak of the COVID-19 pandemic,power generation and the associated CO2emissions in major countries have experienced a decline and rebound.Knowledge on how an economic crisis affects the emission dynami...Since the outbreak of the COVID-19 pandemic,power generation and the associated CO2emissions in major countries have experienced a decline and rebound.Knowledge on how an economic crisis affects the emission dynamics of the power sector would help alleviate the emission rebound in the post-COVID-19 era.In this study,we investigate the mechanism by which the 2008 global financial crisis sways the dynamics of power decarbonization.The method couples the logarithmic mean Divisia index(LMDI)and environmentally extended input-output analysis.Results show that,from 2009 to 2011,global power generation increased rapidly at a rate higher than that of GDP,and the related CO2emissions and the emission intensity of global electricity supply also rebounded;the rapid economic growth in fossil power-dominated countries(e.g.,China,the United States,and India)was the main reason for the growth of electricity related CO2emissions;and the fixed capital formation was identified as the major driver of the rebound in global electricity consumption.Lessons from the 2008 financial crisis can provide insights for achieving a low-carbon recovery after the COVID-19 crisis,and specific measures have been proposed,for example,setting electricity consumption standards for infrastructure construction projects to reduce electricity consumption induced by the fixed capital formation,and attaching energy efficiency labels and carbon footprint labels to metal products(e.g.,iron and steel,aluminum,and fabricated metal products),large quantities of which are used for fixed capital formation.展开更多
基金supported by the National Natural Science Foundation of China(72140005 and 72374122)the China Carbon Neutrality Initiative of Tsinghua University.
摘要In recent years,the replacement of retired coal-fired power plants with nuclear power plants(also known as coal-to-nuclear conversion,C2N)has been considered a particularly cost-effective solution for power system decarbonization amid global climate change mitigation goals.In this study,we improved a power system model of China equipped with provincial spatial resolution.Specifically,we expanded the classification of nuclear technologies from one to four types,based on generation and reactor design,and incorporated relevant C2N conversion constraints.This improvement allows quantification of C2N’s potential role in decarbonizing China’s power system,following the identification of its maximum conversion potential.The results indicate that by utilizing conventional site resources in both coastal and inland China,a major growth of nuclear capacity is possible under China’s carbon peaking and neutrality goals,reaching 422 GW by 2060,with 42%of this capacity being small modular reactors that offer greater operational flexibility.In 2060,nuclear power will become an important source of electricity generation in China,accounting for 18%of total supply.Site resource availability represents a major constraint to this development:Expanding site availability through C2N has the potential to further increase nuclear capacity in 2060 by 13%-23%,while raising nuclear’s share of total electricity supply that year by 2-4 percentage points.Expanding nuclear energy’s share in China’s decarbonization via C2N will yield cost savings of 0.22%-0.69%of system cost from 2030 to 2060.
摘要In the first five months of2026,the total trade volume between China and ASEAN reached 3.52 trillion yuan(US$502.5 billion),up 16.6percent year on year.Thanks to dividends from the 3.0version of the China-ASEAN Free Trade Agreement(CAFTA 3.0),over 90 percent of tariff items within the region now enjoy zero tariffs.Cooperation between the two sides is accelerating onto new tracks of green trade,digital trade,and trade in services.
摘要Driven by the stringent decarbonization regulations increasingly imposed on the global shipping industry,green methanol has emerged as the alternative fuel with the greatest first-mover advantage in the current market.This article systematically reviews international trends in green fuel policy,the market landscape,and development bottlenecks.It compares three mainstream technology pathways:biomass gasification,green electricitybased hydrogen production coupled with CO2,and conventional units coupled with biomass,with a focus on analyzing their technological maturity,carbon emission intensity,and economic efficiency.Using CM Energy as a case study,this paper demonstrates the strategic value of the“coal-based coupled biomass carbon co-production”pathway as a pragmatic solution for the current stage of development,and proposes recommendations for a phased industrial deployment.
摘要As one of the world's primary sources of carbon emissions,the building sector's decarbonization progress directly affects the realization of"dual carbon"goals.Based on life cycle theory,this paper systematically analyzes the technical logic and limitations of carbon emission accounting methods for buildings,and elaborates on innovative pathways for green building decarbonization technologies,including passive design,active energy systems,and BIM-based digitalization.The Technology Acceptance Model(TAM)and a tripartite evolutionary game framework are introduced to analyze the barriers and driving mechanisms for technology diffusion from a socio-technical perspective.Using practical cases from China Construction Science and Technology Group Co.,Ltd.(CSCSTC),the paper quantifies emission reduction performance.Finally,a coordinated implementation framework integrating policy regulation,technological innovation,and market incentives is proposed.Results show that combining Life Cycle Assessment(LCA)with the emission factor method can improve accounting accuracy by over 3O%;integrating passive design and renewable energy technologies reduces building energy consumption by 5O-64%;and scaled application of the"Photovoltaics+Energy storage+Direct current+Flexibility"(PEDF)system achieves renewable energy selfconsumption rates above 80%.Furthermore,modular construction reduces carbon emissions from the construction phase by 3O%,while green financial instruments such as preferential loans can raise project internal rates of return(IRR)by approximately 2-3 percentage points.This study provides theoretical support and practical guidance for low-carbon transition in the building industry.
基金supported by the Major Research Projects of the National Social Science Fund of China(NSFC,Grant no.23VHQ015).
摘要The accelerated decline of Arctic sea ice since the 1980s has paradoxically amplified greenhouse gas(GHG)emissions through increased shipping activities in this ecologically vulnerable region.This study investigates how to reconcile the decarbonization of Arctic shipping with conflicting environmental,economic,and geopolitical interests.Through systematic literature review and interest-balancing analysis,our findings identify three systemic barriers:(1)inadequate adaptation of International Maritime Organization(IMO)regulations to Arctic-specific environmental risks,(2)fragmented enforcement mechanisms among Arctic and non-Arctic States,and(3)technological limitations in clean fuel adoption for ice-class vessels.To address these challenges,a tripartite governance framework is proposed.First,legally binding amendments to International Convention for the Prevention of Pollution from Ships(MARPOL)Annex VI introducing Arctic-specific Energy Efficiency eXisting ship Index(EEXI)standards and extending energy efficiency regulations to fishing vessels.Second,a phased fuel transition prioritizing liquefied natural gas(LNG)and methanol,followed by hydrogen-ammonia synthetics.Third,enhanced multilateral cooperation through an Arctic Climate Shipping Alliance to coordinate joint research and development in cold-adapted technologies and ice-route optimization.By integrating United Nations Convention on the Law of the Sea(UNCLOS)obligations with IMO Polar Code implementation,this study advances a dynamic interest-balancing framework for policymakers,offering actionable pathways to achieve Paris Agreement targets while safeguarding Arctic ecosystems.
基金supported by the National Natural Science Foundation of China(52270043)the National Key Research and Development Program of China(2023YFE0113800 and 2024YFC3715000)the Natural Science Foundation of Beijing Municipality(8242030).
摘要The contamination of wastewater with organic pollutants and nitrogen compounds poses significant environmental challenges.The primary objective of wastewater treatment is the simultaneous denitrification and decarbonization of ammonia nitrogen and organics into harmless by-products.This study presents a novel method for the directional generation of chlorine radical species like·ClO and·Cl using electro-reactive membranes(EMs)known as RuO2@PbO2-M,which were fabricated using an electro-deposition coupled template approach.This method facilitates the rapid and efficient conversion of ammonia to nitrogen and concurrently reduces the chemical oxygen demand in the effluent.Our system achieved ultra-efficient simultaneous denitrification and decarbonization with minimal energy consumption in single-filtration mode,thereby eliminating the need for chemical precursors.We elucidate the formation pathway of·ClO and·Cl during the electrochemical oxidation process involving RuO2@PbO2-M,where·Cl generated from RuO2reacts with·OH from PbO2under hypochlorous acid conditions,thereby enhancing nitrogen and carbon removal.These findings highlight a novel electro-filtration and an innovative reactive membrane design for·ClO synthesis,which provides a new research framework for the concurrent removal of nitrogen and carbon,and offers a promising solution to enhance wastewater treatment efficiency.
基金supported by the Chengdu Philosophy and Social Science Planning Project[Grant No.2022C05]National Natural Science Foundation of China[Grant No.71904158].
摘要Developing low-carbon and efficient power systems is critical for energy security in the global warming context.We address this issue by focusing on the productivity impact of a decarbonization policy in China’s thermal power sector—namely,the“Constructing Large Units and Restricting Small Ones”(CLRS)initiative.Utilizing a resource misallocation model,we construct a new theoretical framework to distinguish between technical and allocative efficiency and analyze productivity using plant-level data.The results indicate that the CLRS policy has significantly improved the allocative and technical efficiency of China’s coal-fired power sector,thereby ensuring power security.The closure of outdated and highly distorted small coal-fired units,which have been replaced by technologically advanced large units,primarily drives the enhanced efficiency.The policy’s effects are most pronounced in large-scale power plants and those with high coal combustion efficiency.Furthermore,a comparison of power plants’productivity distribution before and after policy implementation reveals that the CLRS policy not only enhances capital productivity in the coal-fired power sector but also increases rational labor allocation.Our findings have important policy implications for developing countries vis-à-vis building efficient and stable power systems amid climate change.
基金supported by the Helmholtz Association within the framework of the innovation platform“Solar TAP”[Az:714-62150-3/1(2023)]co-funded by the European Union(ERC,C2C-PV,project number 101088359)。
摘要This study investigates the disparities in the deployment of photovoltaic(PV)technology for carbon emissions reduction across different nations,highlighting the mismatch between countries with high economic capacity and those where PV installation would maximize global decarbonization benefits.This mismatch is discussed based on three key factors influencing decarbonization via PV technology:per capita gross domestic product;carbon intensity of the energy system;and solar resource availability.Current PV deployment is predominantly concentrated in economically advanced countries,and does not coincide with regions where the environmental and economic impact of such installations would be most significant.Through a series of thought experiments,it is demonstrated how alternative prioritization strategies could significantly reduce global carbon emissions.Argument is put forward for a globally coordinated approach to PV deployment,particularly targeting high-impact sunbelt regions,to enhance the efficacy of decarbonization efforts and promote equitable energy access.The study underscores the need for international policies that support sustainable energy transitions in economically less developed regions through workforce development and assistance with the activation of capital.
基金support from the National Key Research and Development Project of China(Grant No.2023YFF0804100)the National Natural Science Foundation of China(NSFC 42102030,12074141,and 12274168)+3 种基金supported by Jilin Provincial Science and Technology Development Project(Grants No.20210402054GH and No.20220101011JC)the Program for Jilin University Science and Technology Innovative Research Team(Grant No.2021-TD-05)National Major Science Facility Synergetic Extreme Condition User Facility Achievement Transformation Platform Construction(2021FGWCXNLJSKJ01)supported financially by the National Natural Science Foundation of China(42272041).
摘要The aqueous fluids within subducted slabs have the potential to influence the form of carbonate presence and the carbon cycling process.Experiments were performed on resistive heating diamond anvil cell using siderite crystals and grains with water under conditions of pressure as high as 11.4 GPa and temperatures reaching up to 530℃.These experiments aimed to simulate geological reactions that may occur within a depth range of 340 km in subducted slabs.Raman spectroscopy was employed to monitor the reactions and microscale phenomena within the sample chamber as pressure and temperature increase.The recovered products were analyzed using scanning electron microscopy and transmission electron microscopy.The results indicate that at 0.8 GPa and 108℃,a Fischer-Tropsch Type(FTT)reaction occurred on the sample surface,resulting in the formation of organic compound formaldehyde,followed by the observation of formic acid.At higher pressure and temperature(3.5 GPa,420℃),the formation ofγ-Fe2O3andγ-FeOOH was observed on the sample surface,accompanied by the release of CO2and H2.Transmission electron microscope analysis of the quenched product powders indicated that the generated iron oxides were consistent with the phases observed at high pressure and temperature conditions.High pressure and temperature dissolution experiments of siderite in water reveal that carbon may be released into the mantle wedge entirely in the form of CO2in warm subducted slabs and cold subducted slabs that subduct to depths of 75 km.The released CO2participates in the carbon cycle of the island arc volcanic systems in the upper mantle at depths of 70-120 km and accelerates the transfer of subducted carbon to the Earth’s surface.
基金provided by the National Natural Science Foundation of China(No.51274200)Research Fund for the Doctoral Program of Higher Education of China(No.20130095110010)
摘要On the basis of understanding the principle of rotary triboelectrostatic separation, dynamic analysis of charged fly ash particles aimed at determining the key factors and separation experiments to improve decarbonization efficiency had been carried out Variables of electrode plate voltage and corrected wind speed are the key factors which affect the decarbonization efficiency on the separation of fly ash, The results of separation experiments show that:(1) With the plate voltage increasing, the efficiency of decarbonization continuously rises and in its selected range, the optimal voltage level is 45 KV;(2) The corrected wind speed can impact the efficiency of decarbonization significantly: with the speed increasing, the efficiency of decarbonization shows a trend of first decline, then increase and decrease again, and in its selected range, the optimal speed is 2.0 m/s. This study is of significance for the improvement of rotary triboelectrostatic separation performance and its decarbonization separation efficiency.
基金supported by the National Natural Science Foundation of China(Nos.51274200 and 51221462)
摘要The basic principle of fly ash triboelectrification is analysed. The mineral electrical index and test method are introduced. The electric difference of different mineral composition of fly ash is discussed by analysis of chemical and mineral composition of fly ash in Xinwen power plant. The dielectric constant and charge-mass ratio of carbon and ash of fly ash are tested. Combined with the experimental study on rotary triboelectrostatic separation, the charged characteristic of fly ash particles with different size is gained. The results show that the dielectric constant of fly ash with different grain size decreased with the decrease of particle size, which lead to the poor electrical conductivity, Thus it can be seen that par- ticle size plays a leading role in conductivity, The charge of carbon and ash with each size increased with the decreased of particle size; and the charge-mass ratio between carbon and ash with the same size lar- ger with the decrease of size, which indicated that the finer particle size, the more favorable for triboelec- trification separation. In the same conditions, the best decarburization effect is realized when the particle size ranges from 0.038 to 0.074 ram, whose decarbonization rate and efficiency index reached 38.93% and 120.83% respectively.
基金supported by the National Science Foundation of China(Grant No.41701232).
摘要Climate change is becoming an important issue in all fields of infrastructure development.Electricity plays a core role in the decarbonized energy system’s path to a regional zero-emission pattern.A well-built trans-Mediterranean backbone grid can hedge the profound evolution of regional power generation,transmission,and consumption.To date,only Turkey and the Maghreb countries(i.e.,Morocco,Algeria,and Tunisia)are connected with the Continental European Synchronous Area.Other south-and east-shore countries have insufficient interconnection infrastructures and synchronization difficulties that have proven to be major hurdles to the implementation of large-scale solar and wind projects and achievement of climate goals.This study analyzes the current trans-boundary grid interconnections and power and carbon emission portfolios in the Mediterranean region.To align with the recently launched new climate target‘Fit for 55’program and the accelerated large-scale renewables target,a holistic review of projected trans-Mediterranean grids and their market,technical,and financial obstacles of implementation was conducted.For south-and east-shore countries,major legal and regulatory barriers encompassing non-liberalized market structure,regulation gaps of taxation and transmission tariffs,and the private sector’s access rights need to be removed.Enhancement of domestic grids,substations,and harmonized grid codes and frequency,voltage,and communication technology standards among all trans-Mediterranean countries are physical prerequisites for implementing the Trans-Mediterranean Electricity Market.In addition,the mobilization of capital instruments along with private and international investments is indispensable for the realization of supranational transmission projects.As the final section of the decarbonization roadmap,the development of electric appliances,equipment,and vehicles with higher efficiency is inevitable in the decarbonized building,transportation,and industry sectors.
摘要A crystalline sapphire (Al2O3) boule (Ф10 × 80mm^3) grown by the temperature gradient technique (TGT) is a bit colored due to carbon volatilization from the graphite heater at high temperatures and the absorption of transitional metal inclusions in the raw material. The sapphire becomes colorless and transparent after decolorization and decarbonization in successive annealings in air and hydrogen at high temperatures. The quality, optical transmissivity,and homogeneity of the sapphire are remarkably improved.
基金supported by the State Key Laboratory of Advanced Metallurgy,China(Project Code:41603006).
摘要Decarbonization is a critical issue for peaking CO2 emissions of energy-intensive industries,such as the iron and steel industry.The decarbonization options of China’s ironmaking and steelmaking sector were discussed based on a systematic three-dimensional low-carbon analysis from the aspects of resource utilization(Y),energy utilization(Q),and energy cleanliness which is evaluated by a process general emission factor(PGEF)on all the related processes,including the current blast furnace(BF)-basic oxygen furnace(BOF)integrated process and the specific sub-processes,as well as the electric arc furnace(EAF)process,typical direct reduction(DR)process,and smelting reduction(SR)process.The study indicates that the three-dimensional aspects,particularly the energy structure,should be comprehensively considered to quantitatively evaluate the decarbonization road map based on novel technologies or processes.Promoting scrap utilization(improvement of Y)and the substitution of carbon-based energy(improvement of PGEF)in particular is critical.In terms of process scale,promoting the development of the scrap-based EAF or DR-EAF process is highly encouraged because of their lower PGEF.The three-dimensional method is expected to extend to other processes or industries,such as the cement production and thermal electricity generation industries.
摘要Yanbei project of Schlumberger Copower Oilfield Engineering Co.,Ltd.-natural gas purification plant decarbonization unit is equipped with two sets of decarbonization systems(parallel operation).The two sets of systems adopt two tower process,full lean liquid circulation regeneration process,one tower absorption(absorption pressure 5.4mpag),one tower regeneration(regeneration temperature 95℃-110℃),purified natural gas carbon dioxide content≤2.5vol%,single set The treatment capacity is 2300 KM3/d.This paper introduces the problems existing in the decarbonization solution of the decarbonization unit in the natural gas purification plant in recent three years,analyzes the causes of pollutants affecting the quality of the decarbonization solution,and probes into the control measures for the pollution of the decarbonization solution,so as to provide reference.
摘要The maritime sector,responsible for around 2.9%of global greenhouse gas(GHG)emissions,is under increasing pressure to decarbonize towards the International Maritime Organization’s(IMO)2050 targets.A number of exisiting reviews have summarized different aspects such as policy frameworks,alternative fuels,and ship technologies,yet few have examined the integrative role of data in advancing maritime decarbonization across these domains.This review establishes a four-pillar framework to capture how data-driven approaches are reshaping maritime decarbonization.It begins by analyzing emerging digital governance policies on the basis of conventional maritime policies.Second,it synthesizes the development of emission datasets,highlighting the indirect databases with direct real-time measurements such as unmanned aerial vehicle(UAV)and portable emission measurement systems(PEMS)monitoring.Third,it reviews methodological advancements in emission modeling,from empirical,economic,and hybrid models to machine learning-based approaches.Finally,it evaluates how these data and modeling advancements support coordinated decarbonization strategies across vessels,fuels,and ports,illustrating the growing role of datainformed decision-making in guiding systemic emission reductions throughout the maritime supply chain.This review links regulatory,data,modeling,and implementation perspectives through a data-centric perspective.By mapping research progress and identifying knowledge gaps across these four pillars,the review offers a structured foundation to support the acceleration of maritime decarbonization efforts.
摘要Microwave is an efficient and clean energy input mode.It is easy to integrate into the chemical industry to promote electrification and assist in decarbonization.The important characteristic of microwave heating is that the entire process volume can be heated internally,while the components with high dielectric loss can be heated selectively and rapidly.Microwave heating initiates very different mechanisms from conventional thermal approaches and can lead to dramatically different results[1].In the background of the“Dual Carbon”goal,microwave technology has an enormous potential to be applied to various fields,mainly chemical engineering,the metallurgical industry and material synthesis.
摘要An extensive literature review was conducted to investigate the pathways for the decarbonization and electrification of society and to cover different aspects to fulfill this objective.Despite the significant attraction and critical demand for achieving net-zero emissions,challenges must be addressed by adjusting policies and regulations and setting investments and budgets with the contribution of all nations and individuals.In this study,we explored the mission and vision of electrification,the reduction of greenhouse gas emissions,the mitigation of global warming,and net-zero targets.We considered alternative scenarios and the COP28 outputs from near-term(2025–2030)and long-term strategies.With this objective in mind,we focused on the clean energy transition as the primary step for electrification.In the following section,we thoroughly reviewed the supplies and capacities of renewables,as well as projected and planned investments,with particular emphasis on hydropower,hydrogen,and other sources.The material demand,which is the main challenge hindering the on-time deployment of clean energy,was investigated.With increasing reliance on renewables,energy storage balances generation and consumption,particularly during peak hours and high-demand situations.Batteries,fuel cells,supercapacitors,and coupled energy conversion and storage were extensively discussed as the main storage devices in electric and hybrid energy storage systems.Finally,we investigated the electrification potential in daily life,from transportation via light-or heavy-duty vehicles to electric aviation,electronic devices,buildings,industrial processes,and smart grids.This framework comprehensively assesses and reviews recently employed strategies for electrification to ensure sustainability and reliability over the coming years.
基金supported by grants from the National Natural Science Foundation of China(72222014,72074138,72074136,and 71904125)the Taishan Scholars Program,and the Major Project of National Social Science Fund of China(22&ZD108).
摘要Since the outbreak of the COVID-19 pandemic,power generation and the associated CO2emissions in major countries have experienced a decline and rebound.Knowledge on how an economic crisis affects the emission dynamics of the power sector would help alleviate the emission rebound in the post-COVID-19 era.In this study,we investigate the mechanism by which the 2008 global financial crisis sways the dynamics of power decarbonization.The method couples the logarithmic mean Divisia index(LMDI)and environmentally extended input-output analysis.Results show that,from 2009 to 2011,global power generation increased rapidly at a rate higher than that of GDP,and the related CO2emissions and the emission intensity of global electricity supply also rebounded;the rapid economic growth in fossil power-dominated countries(e.g.,China,the United States,and India)was the main reason for the growth of electricity related CO2emissions;and the fixed capital formation was identified as the major driver of the rebound in global electricity consumption.Lessons from the 2008 financial crisis can provide insights for achieving a low-carbon recovery after the COVID-19 crisis,and specific measures have been proposed,for example,setting electricity consumption standards for infrastructure construction projects to reduce electricity consumption induced by the fixed capital formation,and attaching energy efficiency labels and carbon footprint labels to metal products(e.g.,iron and steel,aluminum,and fabricated metal products),large quantities of which are used for fixed capital formation.