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Influence of CaO-SiO2-Al2O3-MgO slag structure on dissolution behavior of Al2O3:a molecular dynamics simulation 认领 引用
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作者 Yi-Hong Li Ming-Ming Lu +4 位作者 Rui Wang Dong Wang Xin Hu Peng Zhang Qiang Zhu 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2026年第1期110-124,共15页
The structural changes in the CaO-SiO2-Al2O3-MgO slag system with varying CaO contents were investigated through molecular dynamics(MD)simulations,and its effect on the dissolution behavior of alumina inclusi... The structural changes in the CaO-SiO2-Al2O3-MgO slag system with varying CaO contents were investigated through molecular dynamics(MD)simulations,and its effect on the dissolution behavior of alumina inclusions was characterized by the Kullback-Leibler(KL)divergence.The slag structure analysis revealed that the[AlO]tetrahedral structure was the primary network structure in the slag.With increasing the CaO content,the non-bridge oxygen(NBO)content in the slag structure increases,and the bridge oxygen(BO)content decreases,thereby reducing the complexity of the slag network structure.Raman spectroscopy detection verifies the results of the MD simulations.The results indicated that the dissolution rate of alumina inclusions accelerates with increasing the CaO content in the slag,owing to the reduced complexity of the slag network structure and the enhanced interatomic interactions.The simulation results for the dissolution of alumina inclusions were consistent with theoretical calculations based on the slag inclusion capacity and the dimensionless dissolution rate of inclusions.Radial distribution function analysis demonstrated that the interaction between atoms in the slag system and alumina inclusions strengthens,increasing the dissolution rate of alumina inclusions.The[AlO6]octahedral structure of the alumina inclusions is disrupted,forming BO structures,which in turn enhances the complexity of the slag network structure,slowing the dissolution rate of alumina inclusions.In contrast,the slag system with a higher CaO content has a relatively simpler network structure,promoting faster alumina inclusion dissolution. 展开更多
关键词 Molecular dynamics simulation Slag structure Dissolution behaviour Alumina inclusion Dissolution rate
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Unraveling dolomite dissolution stoichiometry in circumneutral to alkaline pH environments 认领 引用
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作者 Irshad Bibi Aniqa Amin +1 位作者 Ralf R.Haese Nabeel Khan Niazi 《Acta Geochimica》 EI CAS CSCD 2026年第1期132-141,共10页
Examining carbonate dissolution kinetics at mineral-water interface is crucial to understand numerous environmental and geochemical processes,including global carbon cycling,CO2sequestration in deep geological rese... Examining carbonate dissolution kinetics at mineral-water interface is crucial to understand numerous environmental and geochemical processes,including global carbon cycling,CO2sequestration in deep geological reservoirs,and trace elements release in terrestrial and aquatic environments.Here we explored the effect of circumneutral to alkaline pH solutions(pH 6-11)on dissolution kinetics of pure dolomite and Ca and Mg release stoichiometry in flow-through reactor experiments at 25±1℃.Results revealed that the dolomite dissolution rates obtained from effluent Ca and Mg concentrations(RCaand RMgin mol/cm2/s)were dependent on input solution pH and HCO3-log activity.The pH dependence of dissolution rates showed two distinct trends,i.e.,at circumneutral pH ranging between 6 and 8,the dissolution rate decreased with increasing pH,with minimum rate at pH 8.While in the highly alkaline pH range(pH 9-11),the dolomite dissolution rate increased with an increasing pH.Irrespective of the input pH,the dolomite dissolution rates indicated a reverse relationship with HCO3-log activity,with the lowest dissolution rate(R Ca=3.80×10-12mol/cm2/s)at pH 8 where HCO3-log activity attained the highest value(-3.957).The lower R Ca and R Mg obtained at pH 8 compared to all the other pH could possibly be attributed to an inhibition caused by high HCO3-log activity in solution at this pH.Dolomite dissolution rates were non-stoichiometric at all the experimental pH values,showing higher preferential Ca over Mg release(RCa>RMg)whereas an opposite trend was observed at pH 8,with RCa<RMgat the steady state.Saturation index values calculated using geochemical speciation modelling were positive for Mg-bearing minerals(brucite,dolomite,artinite)at alkaline pH of 10-11,indicating favourable conditions for their precipitation under studied conditions.This study provides insights on the significance of log ion activities of HCO3-and Me-OH+under varying pH for elucidating the dissolution mechanism of dolomite in circumneutral to alkaline aqueous environments. 展开更多
关键词 Alkaline waters Carbonates Mineral dissolution Stoichiometry
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Tailoring morphology and performance of polyamide nanofiltration membrane via nanobubble dissolution regulation 认领 引用 被引量：1
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作者 Yaning Tian Zhiwei Qiu +1 位作者 Ruobin Dai Zhiwei Wang 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第1期598-601,共4页
Nanofiltration(NF) technology,with its capacity for nanoscale filtration and controllable selectivity,holds significant promise in diverse applications.However,the current upper bound of permeance and selectivity of N... Nanofiltration(NF) technology,with its capacity for nanoscale filtration and controllable selectivity,holds significant promise in diverse applications.However,the current upper bound of permeance and selectivity of NF membranes is intrinsically constrained by the morphology and structure of the polyamide(PA) selective layer.This issue arises because NF membranes typically exhibit relatively smooth nodular structures,which theoretically impede efficient water transport.In this study,we enhanced the formation of nanobubbles by synergistically regulating with surfactant and low temperatures,resulting in the fabrication of PA NF membranes with a crumpled morphology.We observed that lower temperatures promote enhanced gas solubility in the aqueous phase,facilitating increased nanobubble formation through the foaming effect of surfactant sodium dodecylbenzene sulfonate(SDBS).Consequently,this resulted in the creation of PA NF membranes with more crumpled structures and superior performance,with pure water permeance reaching 36.25 ± 0.42 L m-2h-1bar-1,representing an improvement of 14.47 L m-2h-1bar-1compared to the control group.Additionally,it maintains a high Na2SO4 rejection rate of97.00 % ± 0.58 %.The PA NF membranes produced by eliminating nanobubbles and free interfaces exhibited a smooth structure,whereas introducing nanobubbles(through Na HCO3 addition,N2 pressurization,and ultrasonication) resulted in the formation of crumpled membranes.This emphasized that the large amount of nanobubbles generated by SDBS and low temperature in the interfacial process played a critical role in shaping crumpled PA NF membranes and enhancing membrane performance.This approach has the potential to provide valuable insights into customizing the structural design of TFC PA NF membranes,contributing to further advancements in this field. 展开更多
关键词 Nanofiltration Polyamide membrane Nanobubble Crumpled structure Dissolution regulation
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Battery Architecture Without Cathode Based on Deposition and Dissolution Chemistry of Aluminum and Manganese Ions 认领 引用
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作者 Lixin Zhao Hengrui Zhang +16 位作者 Shu Zhang Xinyuan Pei Yue Wang Shunri Zheng Zhaoliang Yu Xianyu Chu Haibo Li Jiaming Li Shichong Xu Zhaofeng Zhai Nan Huang Kar Ban Tan Kanglei Pang Xiaotian Yang Bo Liu Wenjuan Han Ming Lu 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2026年第1期54-63,共10页
As the carrier of charge storage,the electrode determines the efficiency of the energy conversion reaction between the battery and the substance.However,with the continuous development of scientific research,electrode... As the carrier of charge storage,the electrode determines the efficiency of the energy conversion reaction between the battery and the substance.However,with the continuous development of scientific research,electrode preparation is still facing complex technical problems,and it is difficult to achieve a balance in performance,cost,and technology.Based on the ion dissolution and deposition behavior of Mn2+/MnO2 and Al3+/Al,a novel cathode-free aqueous ion dissolution/deposition battery is designed,which can contribute 15 mAh at 16 cm2 in a voltage window of 0.5-1.8 V.The charge storage and the attenuation mechanism are systematically investigated.The battery model with compensable electrolyte was constructed,and the cycle characteristics of the cathode-free aqueous ion dissolution/deposition battery were optimized,which could achieve 1000 h continuous operation.This system provides a low-cost and high-safety solution for future high-energy density and large-scale energy storage.Future research will focus on optimizing electrolytes,controlling deposition morphology,and improving interface stability to further promote the commercialization of cathode-free batteries. 展开更多
关键词 aluminum-ion battery deposition dissolution electrode manganese dioxide
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Redox Reaction and Dissolution Analysis for Hollow C Nanospheres Comprising N-Doped C Framework With Abundant Ni–Co Heteronuclear Catalysts for Highly Durable K-Te Batteries 认领 引用
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作者 Sung Woo Cho Kun Woo Baek +5 位作者 Thillai Govindaraja Senthamaraikannan Hyun Woo Kim Dong-Hee Lim Jin-Sung Park Rakesh Saroha Jung Sang Cho 《Rare Metals》 SCIE EI CAS CSCD 2026年第3期794-809,共16页
Tellurium(Te),emerging as a promising alternative to sulfur(S)and selenium(Se),offers significant advantages for potassium(K)ion storage due to its comparable theoretical volumetric capacity(2619 mAh cm-3)and highe... Tellurium(Te),emerging as a promising alternative to sulfur(S)and selenium(Se),offers significant advantages for potassium(K)ion storage due to its comparable theoretical volumetric capacity(2619 mAh cm-3)and higher electronic conductivity(~102 S m-1),which promotes rapid charge transfer and improves reaction kinetics.However,substantial volume changes during potassiation/depotassiation and the shuttling effect of polytellurides hinder the feasibility of K-Te batteries.Moreover,comprehensive studies on the phase formation and dissolution mechanism of K-polytellurides(K-pTen)employing various in situ and ex-situ techniques are scarcely reported.Herein,we introduce a rational strategy utilizing nickel(Ni)and cobalt(Co)heteronuclear double-atom catalysts(DACs)encapsulated within hollow porous carbon nanospheres(Ni/Co-NHPCNS)as hosts for tellurium impregnation(Te-Ni/Co-N-HPCNS).In situ and ex-situ XRD analysis revealed continuous phase transformation during discharge from amorphous Te(starting at OCV)to K2Te3(discharged to 1.5 V)and finally to K5Te3(discharged to 0.5 V).During the reverse scan,K5Te3 was reversibly converted to K2Te3(charged to 3.0 V).Additionally,density functional theory calculations have shown that the presence of Ni/Co-DAC significantly impedes the dissolution of K-pTen species,thereby expediting the reaction kinetics to unprecedented levels(3000 cycles at 2.0C).When tested as a negative electrode for K-ion storage in a full-cell layout,the prepared nanostructure exhibits highly reversible K-ion redox reactions,demonstrating its potential for commercial applications.We believe that the comprehensive design and characterization strategy discussed herein will open new frontiers for obtaining nanostructures with unparalleled electrochemical performances. 展开更多
关键词 density functional theory double atom catalyst exceptional potassium storage polytelluride dissolution porous carbon nanosphere
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Influence of hot dipping on cementite dissolution,microstructural evolution,and mechanical properties of cold-drawn steel wire for large span suspension bridge cables 认领 引用
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作者 Pan Cai Cheng-Yang Hu +6 位作者 Jia-Lin Li Xiao-Xiong Zhu Jie Zhou Lin Cheng Hua-Juan Xue Jun Zhao Kai-Ming Wu 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2026年第5期290-303,共14页
On the basis of 2100 MPa ultra-high-strength bridge cable steel wire designed by our research group in the early stage,we further understand the change of the performance of the steel wire after hot dipping,which pave... On the basis of 2100 MPa ultra-high-strength bridge cable steel wire designed by our research group in the early stage,we further understand the change of the performance of the steel wire after hot dipping,which paves the way for the optimization of the hot dipping process and the development of higher-strength steel wire.Cold-drawn wires(5.9 and 7.0 mm in diameter)underwent controlled thermal exposures in a salt bath furnace simulating industrial hot dipping conditions(440-460℃,10-300 s),followed by multi-scale characterization combining tensile testing,scanning electron microscope and transmission electron microscope,and three-dimensional atom probe tomography.The results revealed a critical time-dependent competition between strengthening and softening mechanisms:short-duration treatments(≤30 s)enhanced strength through cementite dissolution and carbon supersaturation in ferrite,while prolonged exposures(>60s)degraded performance through lamellar spacing coarsening and dislocation annihilation.It is worth noting that the peak strength is ahead of the elongation in time to meet the standard requirements,which indicates that the process window should be optimized by the hot dipping process.Experiments and kinetic analysis determined that 30-60s was the best processing time,and the balance performance was achieved by controlling the dissolution of cementite. 展开更多
关键词 Cold-drawn steel wire Simulated hot dipping Pearlite lamellar spacing Cementite dissolution Dislocation density
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Direct preparation of LiOH fromα-spodumene with improved autoclave dissolution in NaOH−Na2SO4−CaO system 认领 引用
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作者 Shu-hao DONG Ya-kai YANG +4 位作者 Dong-qi SONG Hao ZHANG Hui GUO Jiu-qing LIU Min GAN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2026年第8期2469-2482,共14页
An alkaline autoclave dissolution method was developed to directly extract LiOH fromα-spodumene in NaOH−Na2SO4−CaO system.Approximately 90.3%Li,10.27%Si,and 9.62%Al were leached under optimal conditions:ore to ... An alkaline autoclave dissolution method was developed to directly extract LiOH fromα-spodumene in NaOH−Na2SO4−CaO system.Approximately 90.3%Li,10.27%Si,and 9.62%Al were leached under optimal conditions:ore to CaO mass ratio of 1:1,liquid-to-solid ratio of 14 mL/g,NaOH and Na2SO4mass concentrations both of 15%at 280℃for 3 h.Notably,the addition of Na2SO4was found to selectively replace Li+while simultaneously reduce NaOH consumption.Kinetic analysis was also provided further insight into the dissolution behavior ofα-spodumene in this system.This innovative autoclave process can eliminate the energy-intensive high-temperature calcination for phase transformation,and enables the direct preparation of LiOH·H2O fromα-spodumene. 展开更多
关键词 spodumene lithium extraction autoclave dissolution alkaline system LiOH preparation
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Molecular dynamics simulation for effect of stress on quartz dissolution:Implication on the development of high-quality reservoirs in foreland basins 认领 引用
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作者 Bing Wu Jian Wang +4 位作者 Ying-Chang Cao Qiang Lyu Song-Qing Hu Shuang-Qing Sun Hai-Jun Yang 《Petroleum Science》 SCIE EI CAS CSCD 2026年第6期3059-3073,共15页
The dissolution of unstable minerals such as feldspar and carbonate is currently recognized as the primary cause of the dissolution pores in most clastic rock reservoirs globally.However,research has shown that quartz... The dissolution of unstable minerals such as feldspar and carbonate is currently recognized as the primary cause of the dissolution pores in most clastic rock reservoirs globally.However,research has shown that quartz dissolution pores generally occu py a certain proportion in fo reland basins typified by the Kuqa Depression.This paper studied the dissolution characteristics of quartz through the thin section analysis of the Cretaceous Bashijiqike Formation reservoir in the Kuqa Depression and molecular dynamics simulations,the findings profoundly clarify the influence of stress on quartz dissolution.It was found that the dissolution of quartz grains in the study area is quite common based on thin section observations.The molecular dynamics simulation experiments comprise two sets of experiments:umbrella sampling and molecular dynamics simulation of dissolution process.Through the umbrella sampling,it was found that under lateral compressive stress conditions,the free energy barrier for quartz dissolution is reduced.In molecular dynamics simulation experiments,there is a notable substance exchange process between quartz and the solution,ultimately forming a transition layer with a thickness of several angstroms,this layer exhibits greater thickness under lateral compressive stress conditions.In the simulated closed fluid mineral reaction system,the dissolution products of quartz enter the solution for a period of time,then ultimately reprecipitate on the surface of quartz.Through thin section analysis and molecular dynamics simulation research,the atomic level process of quartz dissolution under lateral compressive stress conditions has been elucidated,it may provide a new perspective on the formation mechanism of deep and ultra-deep high-quality clastic reservoirs. 展开更多
关键词 Foreland basin Deep ultra-deep reservoirs Lateral compressive stress Molecular dynamics simulation Quartz dissolution
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Comparative evaluation of upscaled analytical and numerical models for DNAPL dissolution processes 认领 引用
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作者 Pan-rui Yang Xiao-min Yuan +3 位作者 Hui-rong Guo Bao-lan Li Xing-quan Wang Min Yuan 《Journal of Groundwater Science and Engineering》 2026年第3期382-398,共17页
Mathematical model-based accurate evaluation of the remediation process at organic pollution sites serves as an efficient approach to the management and remediation of contaminant source zones.Numerical and upscaled a... Mathematical model-based accurate evaluation of the remediation process at organic pollution sites serves as an efficient approach to the management and remediation of contaminant source zones.Numerical and upscaled analytical solution models are effective mathematical methods for reproducing the Dense Nonaqueous Phase Liquid(DNAPL)remediation process.However,in the current design of pollutant removal schemes,effective mass transfer models for characterizing the elution behaviors of contaminants remain lacking.In this study,two mathematical methods integrated with improved mass transfer models were employed to simulate the multi-stage contaminant elution behaviors under two distinct scenarios:A mixed-source region subjected to continuous water flushing and a residual DNAPL source treated with shorter-duration pulse flushing of the ethanol solution.Both the improved numerical model and upscaled analytical solution model demonstrated enhanced accuracy,which was attributed to the incorporation of solubilization mechanisms into mass transfer processes and the adoption of a multi-source region division method.The Mean Absolute Errors(MAE)of the numerical simulation for the two scenarios were 20.68 mg/L and 6.93 mg/L,respectively,whereas those of the upscaled model were 33.29 mg/L and 8.60 mg/L,respectively.Comparing the two improved models,the numerical model exhibited higher accuracy,while the upscaled model was characterized by faster computation speed and fewer input parameters. 展开更多
关键词 Mass transfer rate coefficient Numerical model Analytical solution model Multi-stage dissolution behaviors
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Impact of Burial Dissolution on the Development of Ultradeep Fault-controlled Carbonate Reservoirs:Insights from High-temperature and High-pressure Dissolution Kinetic Simulation 认领 引用 被引量：5
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作者 TAN Xiaolin ZENG Lianbo +6 位作者 SHE Min LI Hao MAO Zhe SONG Yichen YAO Yingtao WANG Junpeng LU Yuzhen 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2025年第1期228-242,共15页
Burial dissolution is a critical diagenetic process influencing ultra-deep carbonate reservoir development and preservation.Artificial carbonate samples with different internal structures were prepared,and high-temper... Burial dissolution is a critical diagenetic process influencing ultra-deep carbonate reservoir development and preservation.Artificial carbonate samples with different internal structures were prepared,and high-temperature and highpressure dissolution kinetic simulations were conducted.The results demonstrate that the intensity of burial dissolution is controlled by temperature and pressure,while tectonic-fluid activity influences the development pattern of burial dissolution,ultimately determining the direction of its differential modification.Extensive burial dissolution is likely to occur primarily at relatively shallow depths,significantly influencing reservoir formation,preservation,modification,and adjustment.The development of faults facilitates the maintenance of the intensity of burial dissolution.The maximum intensity of burial dissolution occurs at the tips and overlap zones of faults and intersections of multiple faults.The larger the scale of the faults,the more conducive it is to the development of burial dissolution.Burial dissolution fosters the formation of fault networks characterized by enhanced reservoir capacity and permeability.Burial dissolution controlled by episodic tectonic-fluid activity is a plausible explanation for forming the Tarim Basin's ultra-deep fault-controlled“stringbead-like”reservoirs. 展开更多
关键词 burial dissolution tectonic-fluid ultra-deep carbonate reservoirs high-temperature and high-pressure dissolution kinetic simulation
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Impact of dissolution and precipitation on pore structure in CO2sequestration within tight sandstone reservoirs 认领 引用 被引量：2
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作者 Hui Gao Kai-Qing Luo +6 位作者 Chen Wang Teng Li Zhi-Lin Cheng Liang-Bin Dou Kai Zhao Nan Zhang Yue-Liang Liu 《Petroleum Science》 SCIE EI CAS CSCD 2025年第2期868-883,共16页
Complex physical and chemical reactions during CO2sequestration alter the microscopic pore structure of geological formations,impacting sequestration stability.To investigate CO2sequestration dynamics,comprehens... Complex physical and chemical reactions during CO2sequestration alter the microscopic pore structure of geological formations,impacting sequestration stability.To investigate CO2sequestration dynamics,comprehensive physical simulation experiments were conducted under varied pressures,coupled with assessments of changes in mineral composition,ion concentrations,pore morphology,permeability,and sequestration capacity before and after experimentation.Simultaneously,a method using NMR T2spectra changes to measure pore volume shift and estimate CO2sequestration is introduced.It quantifies CO2needed for mineralization of soluble minerals.However,when CO2dissolves in crude oil,the precipitation of asphaltene compounds impairs both seepage and storage capacities.Notably,the impact of dissolution and precipitation is closely associated with storage pressure,with a particularly pronounced influence on smaller pores.As pressure levels rise,the magnitude of pore alterations progressively increases.At a pressure threshold of 25 MPa,the rate of change in small pores due to dissolution reaches a maximum of 39.14%,while precipitation results in a change rate of-58.05%for small pores.The observed formation of dissolution pores and micro-cracks during dissolution,coupled with asphaltene precipitation,provides crucial insights for establishing CO2sequestration parameters and optimizing strategies in low permeability reservoirs. 展开更多
关键词 Dissolution Precipitation Pore structure CO2sequestration Unconventional reservoirs
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The dilemma of Luhuitou fringing reefs:net dissolution in winter and enhanced acidification in summer 认领 引用 被引量：1
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作者 Junxiao ZHANG Hui HUANG +4 位作者 Xiangcheng YUAN Yong LUO Haorui LIANG Peixi LIANG Xin XU 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2025年第3期785-802,共18页
Global coral reef ecosystems have been severely degraded due to the combined effects of climate change and human activities.Changes in the seawater carbonate system of coral reef ecosystems can reflect their status an... Global coral reef ecosystems have been severely degraded due to the combined effects of climate change and human activities.Changes in the seawater carbonate system of coral reef ecosystems can reflect their status and their responses to the impacts of climate change and human activities.Winter and summer surveys in 2019 found that the ecological community of the Luhuitou coral reef flat was dominated by macroalgae and corals,respectively,contrasting with the conditions 10 years ago.The Luhuitou fringing reefs were sources of atmospheric CO2 in both seasons.In winter,the daily variation range of dissolved inorganic carbon(DIC)in Luhuitou coral reefs was up to 450μmol/kg,while that of total alkalinity(TA)was only 68μmol/kg.This indicated that the organic production was significantly higher than the calcification process during this period.The TA/DIC was approximately 0.15,which was less than half of that in healthy coral reefs;hence,photosynthesis-respiration processes were the most important factors controlling daily changes in the seawater carbonate system.The net community production(NCP)of the Luhuitou coral reef ecosystem in winter was as high as 47.65 mmol C/(m2·h).While the net community calcification(NCC)was approximately 3.35 and-4.15 mmol CaCO3/(m2·h)during the daytime and nighttime respectively.Therefore,the NCC for the entire day was-21.9 mmol CaCO3/(m2·d),indicating a net autotrophic dissolved state.In summer,the acidification was enhanced by thunderstorms and heavy rain with the highest seawater partial pressure of CO2(p CO2)and lowest pH T.Over the past 10 years,the increase rate of seawater p CO2 in Luhuitou reef was approximately 13.3μatm/a***,six times that of the open ocean,while the decrease rate of pH was approximately 0.0083/a,being five times that of the global ocean.These findings underscore the importance of protecting and restoring Luhuitou fringing reef,as well as similar reefs worldwide. 展开更多
关键词 Luhuitou coral reef carbonate system acidification calcification dissolution
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Revealing the intrinsic connection between residual strain distribution and dissolution mode in Mg-Sc-Y-Ag anode for Mg-air battery 认领 引用 被引量：1
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作者 Wei-li Cheng Xu-bang Hao +4 位作者 Jin-hui Wang Hui Yu Li-fei Wang Ze-qin Cui Cheng Chang 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2025年第3期1020-1033,共14页
The dominated contradiction in optimizing the performance of magnesium-air battery anode lies in the difficulty of achieving a good balance between activation and passivation during discharge process.To further reconci... The dominated contradiction in optimizing the performance of magnesium-air battery anode lies in the difficulty of achieving a good balance between activation and passivation during discharge process.To further reconcile this contradiction,two Mg-0.1Sc-0.1Y-0.1Ag anodes with different residual strain distribution through extrusion with/without annealing are fabricated.The results indicate that annealing can significantly lessen the“pseudo-anode”regions,thereby changing the dissolution mode of the matrix and achieving an effective dissolution during discharge.Additionally,p-type semiconductor characteristic of discharge productfilm could suppress the self-corrosion reaction without reducing the polarization of anode.The magnesium-air battery utilizing annealed Mg-0.1Sc-0.1Y-0.1Ag as anode achieves a synergistic improvement in specific capacity(1388.89 mA h g-1)and energy density(1960.42 mW h g-1).This anode modification method accelerates the advancement of high efficiency and long lifespan magnesium-air batteries,offering renewable and cost-effective energy solutions for electronics and emergency equipment. 展开更多
关键词 Mg-air batteries Anode Residual strain distribution Dissolution mode Discharge mechanism
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Influencing factors and thermodynamic-kinetic mechanism of feldspar dissolution in deep-buried sandstone in Bozhong Depression 认领 引用
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作者 Haiqiang Bai Xin Li +2 位作者 Xiaojun Xie Ziyu Liu Lianqiao Xiong 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2025年第10期112-129,共18页
The deep layer has become an important replacement field for oil and gas exploration,but the formation mechanism of effective reservoirs is unknown,and the distribution of dessert reservoirs is difficult to predict,wh... The deep layer has become an important replacement field for oil and gas exploration,but the formation mechanism of effective reservoirs is unknown,and the distribution of dessert reservoirs is difficult to predict,which seriously affects the discovery of deep resources.In this paper,the reservoir of the first and second members of the Shahejie Formation in the Caofeidian 6-4S area of the Bozhong Depression is taken as an example.Through the comprehensive means such as well-seismic calibration,denudation recovery,source-sink quantitative coupling,basin simulation,microscopic observation,X-ray diffraction,inclusion and thermodynamic analysis,the reservoir formation mechanism of dissolution pores and the favorable area distribution of thermodynamic prediction of dissolution reaction in the study area are carried out.The results show that the dissolution pores are the dominant type,accounting for more than 80%of the total pores.The dissolution reaction between soluble minerals such as feldspar accumulated in the near source and acidic fluids such as organic acids formed in the adjacent strata is the main mechanism for the development of dissolution pores.The organic matter in the adjacent strata is controlled by temperature and pressure during the burial evolution process to form organic acids,and migrates to the adjacent reservoirs for selective dissolution under the action of pressure and other driving forces.The characteristics of thermodynamic parameters(ΔG,which can determine whether feldspar is dissolved)and kinetic parameters(R,indicating the degree of feldspar dissolution)of feldspar dissolution reaction show that the thermodynamic parameters of feldspar dissolution are positively correlated with temperature,and the kinetic parameters are correlated with the concentration of organic acid discharge.The results of thermodynamic and kinetic parameters are coupled with provenance-sedimentary facies-diagenetic facies,and it is predicted that the plane area of TypeⅠfavorable area is 50 km2,and the plane area of TypeⅡfavorable area is 62.4 km2.This method provides theoretical reference and method guidance for the prediction of favorable reservoir distribution of deep clastic rocks,and has a good application prospect. 展开更多
关键词 feldspar dissolution thermo-dynamics kinetics reservoir acidic fluid Bozhong Depression
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Petroleum recovery from salt cavern through natural gas displacement:Insights from a gas-oil two-phase flow model with gas dissolution and exsolution 认领 引用
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作者 You-Qiang Liao Tong-Tao Wang +3 位作者 Tao He Dong-Zhou Xie Kai Xie Chun-He Yang 《Petroleum Science》 SCIE EI CAS CSCD 2025年第10期4226-4239,共14页
The challenge of wide brine source and its additional problems come from the economy(energy consumption and other costs),security(re-dissolution of surrounding salt rocks),and environment(groundwater pollution by brin... The challenge of wide brine source and its additional problems come from the economy(energy consumption and other costs),security(re-dissolution of surrounding salt rocks),and environment(groundwater pollution by brine)of salt cavern oil storage are worth examining to improve the efficiency of oil storage.Against this background,this work presented an operating mode of salt cavern oil and gas co-storage and using natural gas displacement for petroleum recovery.A gas-oil two-phase flow model with gas dissolution and exsolution was proposed to evaluate the application prospects of the new method precisely.Numerical studies indicated that the gas void fraction at the wellhead under quasi-steady state conditions is approximately 0.153,which belongs to bubbly flow,and the pressure at the wellhead of the central tube increased from 5.54 to 6.12 MPa during the entire transient flow stage,with an increase of 10.47%.Compared to the traditional method of using brine as the working fluid,the pump pressure rises from 2.92 to 14.01 MPa.However,if the new mode can be linked with the salt cavern gas storage and when the initial wellhead gas pressure exceeds 13 MPa,the energy consumption of the new method will be lower than that of the traditional brine-based operational mode.A new empirical formula is proposed to determine the two-phase flow pattern under different operating parameters.A special focus was given to energy consumption for oil recovery,which grows roughly in accordance with the operating pressure and oil recovery rate.However,the energy cost per volume of crude oil remains almost unchanged.This work provided a new solution for the serious brine problem and is expected to achieve petroleum recovery through natural gas displacement. 展开更多
关键词 Petroleum recovery Natural gas displacement Feasibility analysis Salt cavern Gas-oil two-phase flow Gas dissolution and exsolution
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Insights into the dissolution kinetics of copper-nickel tailings for CO2mineral sequestration 认领 引用
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作者 Zhenghong Yang Haiyun Gu +3 位作者 Sijia Liu Kai Wu Linglin Xu Lijie Guo 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2025年第9期2119-2130,共12页
Copper-nickel tailings(CNTs),consisting of more than 80wt%magnesium-bearing silicate minerals,show great potential for CO2mineral sequestration.The dissolution kinetics of CNTs in HCl solution was investigated thro... Copper-nickel tailings(CNTs),consisting of more than 80wt%magnesium-bearing silicate minerals,show great potential for CO2mineral sequestration.The dissolution kinetics of CNTs in HCl solution was investigated through a leaching experiment and kinetic modeling,and the effects of reaction time,HCl concentration,solid-to-liquid ratio,and reaction temperature on the leaching rate of mag-nesium were comprehensively studied.Results show that the suitable leaching conditions for magnesium in CNTs are 2 M HCl,a solid-to-liquid ratio of 50 g·L−1,and 90℃,at which the maximum leaching rate of magnesium is as high as 83.88%.A modified shrinking core model can well describe the leaching kinetics of magnesium.The dissolution of magnesium was dominated by a combination of chemical reaction and product layer diffusion,with a calculated apparent activation energy of 77.51 kJ·mol−1.This study demonstrates the feasibil-ity of using CNTs as a media for CO2mineral sequestration. 展开更多
关键词 copper-nickel tailings dissolution kinetics magnesium leaching shrinking core model CO2mineral sequestration
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In-situ confocal microscopy study on dissolution kinetics of calcium aluminate inclusions in CaO-Al2O3-SiO2type steelmaking slags 认领 引用
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作者 Guang Wang Muhammad Nabeel +2 位作者 Wangzhong Mu A.B.Phillion Neslihan Dogan 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2025年第2期364-375,共12页
Dissolution kinetics of CaO·2Al2O3(CA2)particles in a synthetic CaO-Al2O3-SiO2steelmaking slag system have been investigated using the high-temperature confocal laser scanning microscope.Effects... Dissolution kinetics of CaO·2Al2O3(CA2)particles in a synthetic CaO-Al2O3-SiO2steelmaking slag system have been investigated using the high-temperature confocal laser scanning microscope.Effects of temperature(i.e.,1500,1550,and 1600℃)and slag composition on the dissolution time of CA2particles are investigated,along with the time dependency of the projection area of the particle during the dissolution process.It is found that the dissolution rate was enhanced by either an increase in temperature or a decrease in slag viscosity.Moreover,a higher ratio of CaO/Al2O3(C/A)leads to an increased dissolution rate of CA2particle at 1600℃.Thermodynamic calculations suggested the dissolution product,i.e.,melilite,formed on the surface of the CA2particle during dissolution in slag with a C/A ratio of 3.8 at 1550℃.Scanning electron microscopy equipped with energy dispersive X-ray spectrometry analysis of as-quenched samples confirmed the dissolution path of CA2particles in slags with C/A ratios of 1.8 and 3.8 as well as the melilite formed on the surface of CA2particle.The formation of this layer during the dissolution process was identified as a hindrance,impeding the dissolution of CA2particle.A valuable reference for designing or/and choosing the composition of top slag for clean steel production is provided,especially using calcium treatment during the secondary refining process. 展开更多
关键词 In-situ observation Dissolution kinetics Confocal laser scanning microscope Calcium aluminate inclusion Steelmaking slag Clean steel
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Dynamic instantaneous dissolution of the precipitates in aged Mg-Zn-Zr alloy at high strain rate 认领 引用
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作者 LIU Yue-yang YANG Yang +6 位作者 HU Li-xiang CHEN Yi KE Yu-bin LI Dan WEI Shao-hong XU Wen-lin CHEN Xiang 《Journal of Central South University》 SCIE EI CAS CSCD 2025年第6期2038-2050,共13页
The commercial ZK 60 magnesium alloy with extruded state experienced aging heat treatment(T 6)was dynamically loaded at strain rate of 3000 s−1 by means of the split Hopkinson pressure bar(SHPB)in this paper.Transmiss... The commercial ZK 60 magnesium alloy with extruded state experienced aging heat treatment(T 6)was dynamically loaded at strain rate of 3000 s−1 by means of the split Hopkinson pressure bar(SHPB)in this paper.Transmission electron microscopy(TEM)observations showed that the precipitatedβ′1 phases partially dissolved(spheroidized)with blurred interfaces within 160μs at 3000 s−1.The average length and diameter of the rod-shapedβ′1 phase particles were 48.5 and 9.8 nm after the T 6 heat treatment;while the average diameter of the sphericalβ′1 phases changed to 8.8 nm after loading.The deformedβ′1 phase generated larger lattice distortion energy than Mg matrix under high strain rate loading.Therefore,the difference of free energy(the driving force of dissolution)between theβ′1 phase and the matrix increased,making the instantaneous dissolution of theβ′1 phase thermodynamically feasible.The dissolution(spheroidization)of theβ′1 phase particles was kinetically promoted because the diffusion rate of the solute Zn atoms was accelerated by combined actions of adiabatic temperature rise,high density of dislocations(vacancies)and high deviatoric stresses during high strain rate loading.The increase in hardness of ZK 60-T 6 alloy could be attributed to solid solution strengthening,dislocation strengthening and second phase particle strengthening. 展开更多
关键词 dynamic dissolution(spheroidization) thermodynamics kinetics high strain rate ZK 60-T 6 magnesium alloy
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Near-infrared responsive polycaprolactone coatings for magnesium implants:Photodynamic antibacterial and controllable dissolution 认领 引用
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作者 Xi Liu Jinglong Pan +5 位作者 You Lv Xu Wang Xiaoze Ma Xinxin Zhang Guangyi Cai Zehua Dong 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2025年第4期1671-1684,共14页
Magnesium implants have received widespread attention in orthopaedic surgery.However,the mechanical degradation and concurrent inflammation caused by the rapid corrosion of Mg limits their applications.In this study,a... Magnesium implants have received widespread attention in orthopaedic surgery.However,the mechanical degradation and concurrent inflammation caused by the rapid corrosion of Mg limits their applications.In this study,a kind of unique core-shell heterojunction CuS@PPy nanostructures was synthesized and then incorporated in polycaprolactone(PCL)to construct an intelligent coating(CuS@PPy/PCL)on micro-arc-oxidized Mg implants.The PCL-based coating can realize near-infrared(NIR)-driven antibacterial and controllable Mg dissolution according to different bone healing stages.At the beginning of bone remodelling,the coating exhibits promising antibacterial properties with 99.67%and 99.17%efficacy against S.aureus and E.coli,respectively,thanks to the singlet oxygen(1O2)and alkoxyl radicals(RO·)generated by the photodynamic effect of CuS@PPy heterojunction under low-power NIR light(1.5 W/cm2).In the bone reparative stage,the PCL-based coating can maintain high corrosion resistance to meet the mechanical requirements of Mg implants in human body fluid.However,after the complete rehabilitation of bones,through a high-power(2 W/cm2)NIR light,the PCL-based coating changed from an elastic to a viscous flow state(44.7℃)under the photothermal effects of CuS@PPy,leading to quick degradation of the PCL-based coating and following accelerating dissolution of the Mg implant(avoiding secondary surgery).Hopefully,this NIR-responsive coating may provide an innovative method for the antibacterial and controllable dissolution of Mg implants. 展开更多
关键词 Magnesium Near infrared irradiation Photodynamic antibacterial Photothermal effect Controlled dissolution
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Numerical Modelling of CO2 Plume Evolution and Dissolution in a Stratified Saline Aquifer 认领 引用
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作者 Bohao Wu Xiuqi Zhang +1 位作者 Haoheng Liu Yulong Ji 《Fluid Dynamics & Materials Processing》 EI 2025年第10期2359-2387,共29页
Geological sequestration of carbon dioxide(CO2)entails the long-term storage of captured emissions from CCUS(Carbon Capture,Utilization,and Storage)facilities in deep saline aquifers to mitigate greenhouse gas accu... Geological sequestration of carbon dioxide(CO2)entails the long-term storage of captured emissions from CCUS(Carbon Capture,Utilization,and Storage)facilities in deep saline aquifers to mitigate greenhouse gas accumulation.Among various trapping mechanisms,dissolution trapping is particularly effective in enhancing storage security.However,the stratified structure of saline aquifers plays a crucial role in controlling the efficiency of CO2 dissolution into the resident brine.In this study,a two-dimensional numerical model of a stratified saline aquifer is developed,integrating both two-phase flow and mass transfer dynamics.The model captures the temporal evolution of gas saturation,reservoir pressure,and CO2 dissolution behavior under varying geological and operational conditions.Specifically,the effects of porosity heterogeneity,permeability distribution,and injection rate on the dissolution process are examined,and sequestration efficiencies across distinct stratigraphic layers are compared.Simulation results reveal that in the early phase of CO2 injection,the plume spreads radially along the lower portion of the aquifer.With continued injection,high-saturation regions expand upward and eventually accumulate beneath the shale and caprock layers.Pressure within the reservoir rises in response to CO2 injection,propagating both vertically and laterally.CO2 migration and dissolution are strongly influenced by reservoir properties,with progressive dissolution occurring in the pore spaces of individual layers.High-porosity zones favor CO2 accumulation and enhance local dissolution,whereas low-porosity regions facilitate vertical diffusion.An increase in porosity from 0.25 to 0.30 reduces the radial extent of dissolution in the high-permeability layer by 16.5%.Likewise,increasing permeability promotes radial dispersion;each 10 mD increment extends the CO2 dissolution front by approximately 18 m.Elevated injection rates intensify both vertical and lateral plume migration:every 0.25×10−6 m/s increase in rate yields an average 100–120 m increase in radial dissolution distance within high-permeability zones. 展开更多
关键词 Stratified saline aquifer CO2migration dissolution porosity permeability
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