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Zonotope-Based Distributed Fusion for 2-D Binary Sensor Systems Under FlexRay Protocols 认领 引用
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作者 Lan Lan Guoliang Wei Ying Sun 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2026年第7期1600-1609,共10页
In this paper,a zonotopic distributed fusion estimation problem is investigated for a class of 2-D nonlinear systems subject to unknown-but-bounded noises over a binary sensor network.An auxiliary innovation is constr... In this paper,a zonotopic distributed fusion estimation problem is investigated for a class of 2-D nonlinear systems subject to unknown-but-bounded noises over a binary sensor network.An auxiliary innovation is constructed to reduce the influence of the less measured information,and Flex Ray protocol is employed to schedule the innovation transmission between nodes.By resorting to the set-membership filtering,a variable-independent zonotope is achieved to constrain local estimation error,and gain parameters are obtained by minimizing the upper bound of zonotope in the F-radius sense.Subsequently,a zonotopic distributed fusion scheme is implemented through the matrixweighted fusion criteria,and an optimized weighted matrix is obtained using the Lagrange Multiple method.Furthermore,the monotonicity of the local zonotope is analyzed with the gain-constraint parameter.Finally,a numerical example is considered to verify the effectiveness of the developed fusion algorithm. 展开更多
关键词 Binary sensor distributed fusion 2-D nonlinear systems FlexRay protocols zonotope
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A THMC model for gas recovery from coal seams:Integrating binary gas-water adsorption and two-phase flow 认领 引用
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作者 Zhiyong Xiao Gang Wang +5 位作者 Jie Liu Huafeng Deng Yujing Jiang Feng Jiang Chengcheng Zheng Yinge Zhu 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第3期2033-2058,共26页
Although extensive research has been conducted on CO2-enhanced coalbed methane(CO2-ECBM)recovery,most prior studies have focused on the impact of gas adsorption-induced swelling on coal permeability under equili... Although extensive research has been conducted on CO2-enhanced coalbed methane(CO2-ECBM)recovery,most prior studies have focused on the impact of gas adsorption-induced swelling on coal permeability under equilibrium conditions.This paper presents a comprehensive thermo-hydro-mechanical-chemical(THMC)model that integrates thermal expansion and heat conduction(T),gas diffusion in the matrix and gas-water two-phase flow in the fractures(H),matrix and fracture deformation due to poroelasticity(M),and non-equilibrium binary gas adsorption-induced matrix swelling(C)during CO2-ECBM recovery.The accuracy of the proposed model was verified through experimental data,and the model was simulated using finite element method(FEM)software.Simulation results indicate that the permeability evolution can be categorized into three stages.Ignoring the impact of water on gas adsorption properties would lead to an overestimation of the influence of adsorption-induced swelling,while disregarding non-equilibrium adsorption underestimates it.An examination of five designed cases identified critical factors influencing permeability.Parametric analysis shows that increases in the injection pressure,the injection temperature,and the initial permeability promote the competitive adsorption-induced swelling between CH4and CO2,leading to increased CH4production and CO2storage.Conversely,an increase in initial water saturation reduces available gas flow space,decreasing both CH4production and CO2storage.Higher irreducible water saturation favors early gas recovery,while lower irreducible water saturation is more advantageous for long-term recovery. 展开更多
关键词 CO2-Enhanced coalbed methane(CO2-ECBM) Binary gas adsorption Gas-water two-phase flow Non-equilibrium adsorption
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常温高压液化分离CO2-N2二元气体的实验研究 认领 引用
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作者 宋亦辰 刘龙昊 +1 位作者 冯增朝 石建行 《煤炭转化》 CAS CSCD 北大核心 2026年第3期48-56,共9页
煤炭开采与使用中的碳排放是产生温室效应的主要原因,为减少CO2的排放、实现碳达峰碳中和的目标,提出了将煤原位热解开采技术与CO2捕集、利用与封存(CCUS)技术相结合的方法。为解决煤原位热解的高温高压产物中CO2分离的问题,... 煤炭开采与使用中的碳排放是产生温室效应的主要原因,为减少CO2的排放、实现碳达峰碳中和的目标,提出了将煤原位热解开采技术与CO2捕集、利用与封存(CCUS)技术相结合的方法。为解决煤原位热解的高温高压产物中CO2分离的问题,同时进一步优化CCUS技术,必须对CO2的性质开展深入研究,目前关于多元混合体系中CO2在常温高压条件下的性质的实验研究仍存在空白。为探究多元混合体系中CO2在常温高压下的性质,在实验室中分别进行了CO2液化规律实验和CO2溶解力实验,获得了CO2-N2二元混合体系在温度287.15 K下,CO2初始摩尔分数分别为30%、40%、50%、60%时,不同压强下CO2溶解与液化的规律。结果表明:在287.15 K下5 MPa-9 MPa之间,在达到CO2临界压强之前体系内压强越大,CO2液化效果越好,且体系内CO2初始摩尔分数越高,液化效果越好,60%CO2初始摩尔分数的混合气体在7.25 MPa时,CO2摩尔分数可降低至38.25%。而当压强大于7.38 MPa且温度为287.15 K时,CO2由液相变为密相,此时CO2溶解力会由13.38%突增至18.45%。 展开更多
关键词 液相CO2 密相CO2 二元混合气体 液化效果 溶解力
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A Systematic Review of Multiphase Flow and Phase Change in Cryogenic CH4-CO2Pipeline Systems 认领 引用
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作者 Ting He Dong Chen +2 位作者 Liqiong Chen Kun Huang Haoyu Jia 《Fluid Dynamics & Materials Processing》 EI 2026年第5期224-257,共34页
The global transition toward sustainable energy systems underscores the strategic importance of methane(CH4)–carbon dioxide(CO2)mixtures in cryogenic applications.In Liquefied Natural Gas(LNG)processing and Carbon... The global transition toward sustainable energy systems underscores the strategic importance of methane(CH4)–carbon dioxide(CO2)mixtures in cryogenic applications.In Liquefied Natural Gas(LNG)processing and Carbon Capture,Utilization,and Storage(CCUS)networks,such mixtures are routinely exposed to low-temperature environments where phase stability becomes critical.Under these conditions,the unintended formation of solid CO2(dry ice)within pipelines poses significant engineering challenges,including flow blockage and potential equipment damage.Ensuring flow assurance therefore demands a rigorous understanding of the coupling between thermodynamic phase transitions and complex hydrodynamic behavior.This paper presents a comprehensive review of recent advances in gas–liquid–solid multiphase flow and phase change mechanisms in CH4-CO2systems.It analyzes the thermophysical properties governing CO2de-sublimation and hydrate crystallization,with particular emphasis on non-equilibrium kinetics and delayed nucleation phenomena.In addition,the study assesses the capabilities of advanced modeling approaches,including Computational Fluid Dynamics(CFD),Molecular Dynamics(MD),and Machine Learning(ML)techniques,in predicting flow regime transitions and slurry transport behavior. 展开更多
关键词 Cryogenic multiphase flow CH4-CO2binary system solid formation kinetics thermodynamic non-equilibrium
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价态调控对无钴二元正极材料LiNi0.6Mn0.4O2结构及电化学性能的影响 认领 引用
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作者 孙旭 陆和杰 +3 位作者 梁正 万辉 张校菠 钟盛文 《江西冶金》 CAS 2026年第2期119-127,共9页
以层状无钴二元正极材料LiNi0.6Mn0.4O2为研究对象,通过预烧LiNi0.6Mn0.4O2前驱体调控Ni/Mn价态,采用电感耦合等离子体发射光谱(ICP-OES)分析金属主体含量变化,X射线电子能谱(XPS)分析前驱体价态调控后Ni/Mn价态变化... 以层状无钴二元正极材料LiNi0.6Mn0.4O2为研究对象,通过预烧LiNi0.6Mn0.4O2前驱体调控Ni/Mn价态,采用电感耦合等离子体发射光谱(ICP-OES)分析金属主体含量变化,X射线电子能谱(XPS)分析前驱体价态调控后Ni/Mn价态变化,扫描电子显微镜(SEM)和X射线衍射仪(XRD)分析预烧前后前驱体微观形貌及物相变化。为探究价态调控对前驱体LiNi0.6Mn0.4O2性能的影响,采用固相烧结法制备无钴二元正极材料LiNi0.6Mn0.4O2,并通过SEM和XRD分析其微观形貌和晶体结构变化。结果表明,以高Ni3+含量前驱体制备的锂离子电池正极材料,在2.80~4.35 V电压窗口与0.1 C电流密度下测试,其可逆放电比容量达到177.2 mA·h/g,常温(25℃)循环100次后容量保持率为49.2%,45℃高温循环100次后容量保持率仍能维持在50.4%。实验证实,通过精准调控Ni和Mn价态可有效改善材料结构与电化学性能。本研究不仅阐明了前驱体价态调控的关键影响因素,还为高性能无钴正极材料的理性设计提供了理论指导。 展开更多
关键词 层状无钴二元正极材料 LiNi0.6Mn0.4O2 价态调控 电化学性能 锂离子电池
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钒在FeO-SiO_2-MnO渣系与铁液间的分配行为 认领 引用 被引量：5
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作者 董进明 赵飞 +2 位作者 张延玲 仇圣桃 干勇 《钢铁》 CAS CSCD 北大核心 2011年第7期14-20,共7页
在实验室条件下，系统研究了1380℃下，钒在FeO—SiO2一MnO渣系与铁液间的分配行为。结果表明：钒的提取率、钒在渣一金两相的分配比、渣的钒容量随渣中SiO2的质量分数升高而降低。在SiO2的质量分数较低时，以上参数随MnO质量分数的增... 在实验室条件下，系统研究了1380℃下，钒在FeO—SiO2一MnO渣系与铁液间的分配行为。结果表明：钒的提取率、钒在渣一金两相的分配比、渣的钒容量随渣中SiO2的质量分数升高而降低。在SiO2的质量分数较低时，以上参数随MnO质量分数的增加而升高。而在SiO2的质量分数较高（〉20％）时，随MnO质量分数的增加呈现先升高后降低的趋势。FeO-SiO2一MnO三元渣系中，siO2的质量分数为10％～20％、MnO的质量分数为13％～5％时，以上参数达到最大值，且该区域对应着FeO-SiO2一MnO渣系熔点最低的区域。V2O3在FeO-SiO2一MnO渣系中活度系数的数量级为10^-6～10^-7。 展开更多
关键词 钒 FeO-SiO2-MnO 渣系 分配行为
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Binary molten salt in situ synthesis of sandwich-structure hybrids of hollowβ-Mo2C nanotubes and N-doped carbon nanosheets for hydrogen evolution reaction 认领 引用 被引量：8
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作者 Tianyu Gong Yang Liu +6 位作者 Kai Cui Jiali Xu Linrui Hou Haowen Xu Ruochen Liu Jianlin Deng Changzhou Yuan 《Carbon Energy》 SCIE EI CAS CSCD 2023年第12期111-124,共14页
Focused exploration of earth-abundant and cost-efficient non-noble metal electrocatalysts with superior hydrogen evolution reaction(HER)performance is very important for large-scale and efficient electrolysis of water... Focused exploration of earth-abundant and cost-efficient non-noble metal electrocatalysts with superior hydrogen evolution reaction(HER)performance is very important for large-scale and efficient electrolysis of water.Herein,a sandwich composite structure(designed as MS-Mo2C@NCNS)ofβ-Mo2C hollow nanotubes(HNT)and N-doped carbon nanosheets(NCNS)is designed and prepared using a binary NaCl–KCl molten salt(MS)strategy for HER.The temperature-dominant Kirkendall formation mechanism is tentatively proposed for such a three-dimensional hierarchical framework.Due to its attractive structure and componential synergism,MS-Mo2C@NCNS exposes more effective active sites,confers robust structural stability,and shows significant electrocatalytic activity/stability in HER,with a current density of 10 mA cm-2 and an overpotential of only 98 mV in 1 M KOH.Density functional theory calculations point to the synergistic effect of Mo2C HNT and NCNS,leading to enhanced electronic transport and suitable adsorption free energies of H*(ΔGH*)on the surface of electroactive Mo2C.More significantly,the MS-assisted synthetic methodology here provides an enormous perspective for the commercial development of highly active non-noble metal electrocatalysts toward efficient hydrogen evolution. 展开更多
关键词 binary molten-salt synthesis hydrogen evolution reaction Mo2C hollow nanotubes N-doped carbon nanosheets sandwich structure
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Reduction smelting on bismuth oxide residue in FeO-SiO2-CaO ternary slag system 认领 引用 被引量：2
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作者 张杜超 张新望 +6 位作者 杨天足 文剑锋 刘伟锋 陈霖 饶帅 肖庆凯 郝占东 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第6期1326-1331,共6页
Reduction smelting of the bismuth oxide residue from pressure leaching of bismuth sulfide was investigated in the FeO-SiO_2-CaO ternary slag system.The results show that all the recovery ratios of Bi,Ag,Cu and Pb incr... Reduction smelting of the bismuth oxide residue from pressure leaching of bismuth sulfide was investigated in the FeO-SiO_2-CaO ternary slag system.The results show that all the recovery ratios of Bi,Ag,Cu and Pb increase with the increase of reductive coal proportion,reaction temperature and time,while too much reductive coal would help Fe enter metal phase;CaO/SiO_2and Fe O/SiO_2 of the chosen slag system should be 0.5-0.75 and 1.25-1.75,respectively,for the reason that the slag system has the optimum mobility and is beneficial for the recovery of metals.The corresponding optimum conditions are determined as follows:the added coal proportion is 7%of the leaching residue,CaO/SiO_2 mass ratio in the chosen slag system is 0.5 and FeO-SiO_2 is 1.5,the reaction temperature is 1300°C and the reaction time is 40 min.Under the above conditions,the recovery ratios of Bi,Ag,Cu and Pb are 99.6%,99.8%,97.0%and 97.3%,respectively. 展开更多
关键词 bismuth oxide residue reduction smelting FeO-SiO2-CaO ternary slag system recovery ratio
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Measurement of binary phase diagram of Cu_2S-MoS_2 system 认领 引用 被引量：2
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作者 陈星宇 赵中伟 +1 位作者 郝明明 刘旭恒 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第1期271-275,共5页
A novel method,bath smelting process,was developed to treat molybdenite concentrate aiming at the existing problems of traditional process.To understand the dissolving behavior of MoS2 in white matte,the binary phase ... A novel method,bath smelting process,was developed to treat molybdenite concentrate aiming at the existing problems of traditional process.To understand the dissolving behavior of MoS2 in white matte,the binary phase diagram of Cu2S-Mo2S was measured by the cooling curve method.The result shows that this system is a simple binary eutectic with a eutectic temperature of（1117.0±3.0）℃ and a eutectic composition of（1.70±0.20）% MoS2 in mass fraction.When the MoS2 addition exceeds 4.48%,MoS2 and Cu2S can form the ternary compound containing CuMo2S3 or Cu2Mo6S8.In the temperature range of copper smelting,1200-1300℃,molybdenite can dissolve in the cuprous sulfide.At 1200℃,the solubility of molybdenite can reach 14.8%. 展开更多
关键词 binary system Cu2S-MoS2 bath smelting process solubility eutectic molybdenite
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FeO-SiO_2-MnO(-TiO_2)渣系与铁液间钒的分配行为及影响因素 认领 引用 被引量：3
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作者 董进明 赵飞 +2 位作者 张延玲 仇圣桃 干勇 《过程工程学报》 CAS 北大核心 2010年第6期1076-1083,共8页
实验研究了V在FeO-SiO2-MnO(-TiO2)渣系与铁液间的分配行为,以及温度、渣成分、渣铁比、铁水初始[Si]、[Ti]含量的影响趋势.结果表明,在FeO-SiO2-MnO渣系中,铁水中V的入渣率、V在渣-金两相的分配比以及渣的钒容量均随温度升高而降低,而... 实验研究了V在FeO-SiO2-MnO(-TiO2)渣系与铁液间的分配行为,以及温度、渣成分、渣铁比、铁水初始[Si]、[Ti]含量的影响趋势.结果表明,在FeO-SiO2-MnO渣系中,铁水中V的入渣率、V在渣-金两相的分配比以及渣的钒容量均随温度升高而降低,而铁水中C的氧化损失随温度升高而增加;渣铁比较低的情况下,V的入渣率明显降低,但两种渣铁比的情况下,V的最大入渣率均落在MnO含量13%～25%,SiO2含量12%～24%的成分范围内.在FeO-SiO2-MnO-TiO2渣系中,随渣中TiO2含量增加,铁水中V的入渣率、V在渣-金两相的分配比以及渣的钒容量随之降低,V2O3在渣中的活度系数随TiO2含量升高而升高.实验条件下,各因素对铁水中V的入渣率的影响程度按以下顺序依次降低:终渣成分>温度>铁水初始[Si]、[Ti]等元素含量. 展开更多
关键词 钒 FeO-SiO2-MnO(-TiO2)渣系 分配行为 影响因素
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Excess Molar Volume and Apparent Molar Volume of Binary Mixtures of 2-Methyl-3-buten-2-ol with 1-Alcohol at 298.15K 认领 引用 被引量：1
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作者 刘迪霞 李浩然 +1 位作者 邓东顺 韩世钧 《Chinese Journal of Chemical Engineering》 SCIE EI CAS 2002年第4期454-458,共5页
Excess molar volumes (V^E_m) of binary mixtures of2-methyl-3-buten-3-ol [CH_3C(OH)(CH_3)CHCG_2] with four 1-alcohols:methanol, ethanol, 1-propanol and l-butanol at 298.15 K andatmospheric pressure are derived from den... Excess molar volumes (V^E_m) of binary mixtures of2-methyl-3-buten-3-ol [CH_3C(OH)(CH_3)CHCG_2] with four 1-alcohols:methanol, ethanol, 1-propanol and l-butanol at 298.15 K andatmospheric pressure are derived from density measurements with avibrating-tube densimeter. All the excess volumes are negative in thesystems over the entire composition range. The results are correlatedwith the Redlich-Kister equation. The effects of chain length ofl-alcohols on V^E_m are discussed. The apparent molar volumes of2-methyl-3-ol and l-alcohols are calculated respectively. 展开更多
关键词 excess molar volume binary mixture 2-methyl-3-buten-2-ol l-alcohol
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CO_2 methanation over TiO_2–Al_2O_3 binary oxides supported Ru catalysts 认领 引用 被引量：3
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作者 Jinghua Xu Qingquan Lin +3 位作者 Xiong Su Hongmin Duan Haoran Geng Yanqiang Huang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2016年第1期140-145,共6页
TiO_2 modified Al_2O_3 binary oxide was prepared by a wet-impregnation method and used as the support for ruthenium catalyst. The catalytic performance of Ru/TiO_2–Al_2O_3catalyst in CO_2 methanation reaction was inv... TiO_2 modified Al_2O_3 binary oxide was prepared by a wet-impregnation method and used as the support for ruthenium catalyst. The catalytic performance of Ru/TiO_2–Al_2O_3catalyst in CO_2 methanation reaction was investigated. Compared with Ru/Al_2O_3 catalyst, the Ru/TiO_2–Al_2O_3catalytic system exhibited a much higher activity in CO_2 methanation reaction. The reaction rate over Ru/TiO_2–Al_2O_3 was 0.59 mol CO_2·(g Ru)1·h-1, 3.1 times higher than that on Ru/Al_2O_3[0.19 mol CO_2·(gRu)-1·h-1]. The effect of TiO_2 content and TiO_2–Al_2O_3calcination temperature on catalytic performance was addressed. The corresponding structures of each catalyst were characterized by means of H_2-TPR, XRD, and TEM. Results indicated that the averaged particle size of the Ru on TiO_2–Al_2O_3support is 2.8 nm, smaller than that on Al_2O_3 support of 4.3 nm. Therefore, we conclude that the improved activity over Ru/TiO_2–Al_2O_3catalyst is originated from the smaller particle size of ruthenium resulting from a strong interaction between Ru and the rutile-TiO_2 support, which hindered the aggregation of Ru nanoparticles. 展开更多
关键词 CO2 methanation Supported Ru catalyst TiO2–Al2O3 binary oxide
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Study on the NaCl-CaCl_2 Binary System 认领 引用 被引量：1
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作者 Qiao Zhiyu Du Ailing +4 位作者 Mo Wenjing Zhi Jinbiao Wang Mingsheng Zheng Chaogui Duan Shuzhen Dept.of Physical Chemistry,University of Science and Technology Beijing Former Beijing University of Iron and Steel Technology Dept.of Chemistry,Peking University. 《Rare Metals》 SCIE EI CAS 1989年第1期9-13,共5页
By use of micro-DTA technique as well as ambient and high temperature X-ray analysis the phase diagram of NaCl-CaCl_2 has been checked.It is.a simple eutectic system with a solid solubility in the sodium chloride side... By use of micro-DTA technique as well as ambient and high temperature X-ray analysis the phase diagram of NaCl-CaCl_2 has been checked.It is.a simple eutectic system with a solid solubility in the sodium chloride side.The eutectic point is at 773K,49 mol% NaCl.The experimental results,especially those of the X-ray diffraction studies have showed that the incongruent compound 4NaCl-CaCl_2 does not exist in the NaCl-CaCl_2 system. 展开更多
关键词 Study on the NaCl-CaCl2 Binary System NaCl
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A Prediction of the Excess Partial Molar Free Energies of MgCl_2 in the KCI-MgCl_2-LiCl Molten Salt System Containing MgCl_2 below 0.5 from Thermodynamic Properties of Binary Systems 认领 引用 被引量：2
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作者 Quanru ZHANG, Yuangao LI and Zheng FANG 《Journal of Materials Science & Technology》 SCIE EI CAS 2000年第1期85-87,共3页
The thermodynamical properties of MgCl_2 in KCI-MgCl_2-LiCl molten electrolytes containing MgCl_2 below 0.5 (mole fraction, the same below) have been determined from the interchange energies of two binary systems KCI-... The thermodynamical properties of MgCl_2 in KCI-MgCl_2-LiCl molten electrolytes containing MgCl_2 below 0.5 (mole fraction, the same below) have been determined from the interchange energies of two binary systems KCI-MgCl_2 and LiCI-MgCl_2, by means of a model on the assumptions that the electrolytes in the solution are treated as independent particles instead of their ion forms and the interchange energy between the component pair KCI-LiCl is ignored when compared with those of component pairs KCl-MgCl_2 and MgCl_2-LiCl. The interchange energies, wKCl-MgCl_2 and wMgcCl_2-Licl, are obtained as-70000 and -13800 J.mol-1, from the corresponding binary solutions, respectively. 展开更多
关键词 KCI Free A Prediction of the Excess Partial Molar Free Energies of MgCl2 in the KCI-MgCl2-LiCl Molten Salt System Containing MgCl2 below 0.5 from Thermodynamic Properties of Binary Systems LiCl
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Vaporization model of MgCl2-CaCl2 binary melts in fluidized bed 认领 引用
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作者 Qiao Wang Qingshan Zhu +2 位作者 Chuanlin Fan Zhen Wang Hongzhong Li 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2017年第1期123-129,共7页
The present study investigated the vaporization kinetics of MgCl_2,CaCl_2 and their binary melts in a fluidized bed at1073-1273 K,and developed a vaporization model for the binary melts to explore the possibility of a... The present study investigated the vaporization kinetics of MgCl_2,CaCl_2 and their binary melts in a fluidized bed at1073-1273 K,and developed a vaporization model for the binary melts to explore the possibility of achieving enhanced vaporization rate for the feedstock containing CaO greater than 0.2 wt%.The vaporization rate constant of MgCl_2 is more than seven times than that of CaCl_2 at 1273 K.The vaporization rate of the binary melt was significantly affected by the composition,a small quantity of CaCl_2 can remarkably deteriorate the overall vaporization rate.Experimental results coincide well with the numerical simulation by the vaporization model which regards the evolution of vaporization rate with melts composition.A correlation between the necessary operation temperature and the CaO/(CaO + MgO) of the feedstock was proposed.Predictions reveal that a similar vaporization rate for 0.2 wt%-0.4 wt%CaO content feedstock with 0.2 wt%could be achieved at lower than 1365 K. 展开更多
关键词 MgCl2 CaCl2 Binary melts Vaporization kinetics Kinetics model
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基于SAFT类状态方程的CO2、C1~C4烷醇及其混合物气液相平衡特性的预测研究 认领 引用 被引量：1
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作者 吴世浩 杨智 +4 位作者 谢汉林 何松 郑雅文 王珺瑶 莫松平 《低碳化学与化工》 CAS 北大核心 2025年第3期123-134,共12页
相变吸收剂捕集CO2作为一种新型低能耗碳捕集技术已受到广泛关注。物理溶剂型相变吸收剂具有分相后富相溶液CO2负载更低的优点,具有较好的应用潜力。精确预测溶剂组分的相平衡特性对于相变吸收法CO2捕集系统的设计与优化至关... 相变吸收剂捕集CO2作为一种新型低能耗碳捕集技术已受到广泛关注。物理溶剂型相变吸收剂具有分相后富相溶液CO2负载更低的优点,具有较好的应用潜力。精确预测溶剂组分的相平衡特性对于相变吸收法CO2捕集系统的设计与优化至关重要。针对纯质体系(CO2、C1、C2、C3或C4烷醇)和二元混合体系(CO2+C1烷醇、CO2+C2烷醇、CO2+C3烷醇或CO2+C4烷醇),采用3种典型的统计缔合流体理论(SAFT)类状态方程(分别为CPA、PC-SAFT和SAFT-VR-SW状态方程),系统评估了不同缔合方案对纯质体系气液相平衡特性的预测性能。通过引入二元交互作用系数(kij),探究了不同状态方程对二元混合体系气液相平衡特性的预测性能。结果表明,对于CO2,非缔合方案显示出更高的预测精度,其中采用非缔合方案的PC-SAFT状态方程的预测性能最优;对于C1~C4烷醇,SAFT-VR-SW状态方程具有最大的预测偏差,而使用CPA或PC-SAFT状态方程时,不论是采用2B方案还是3B方案,整体无显著差异。当kij为0时,3种状态方程对不同二元混合体系相平衡特性的预测存在显著差异,其中PC-SAFT状态方程对二元混合体系具有较好的预测性能。通过引入最优kij,3种状态方程对二元混合体系相平衡特性的预测精度均显著提升,其中SAFT-VR-SW状态方程的提升最为显著,预测偏差从35.37%降至5.42%。 展开更多
关键词 CO2捕集 烷醇 SAFT类状态方程 相平衡特性 二元混合体系
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CCUS背景下的伴生气中CO2回收工艺技术研究 认领 引用 被引量：3
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作者 田春 祁宝萍 +1 位作者 金毅浪 李祁峰 《石油石化节能与计量》 CAS 2025年第2期57-62,共6页
针对油田实施CCUS技术后,生产井伴生气中CO2含量超标,现有工艺无法适应伴生气的处理等问题,在分析组分变化及CO2分离特性的基础上,确定了采用萃取精馏的方式完成CO2分离,对比了三塔工艺和四塔工艺在各方面的差异性,并针对四塔... 针对油田实施CCUS技术后,生产井伴生气中CO2含量超标,现有工艺无法适应伴生气的处理等问题,在分析组分变化及CO2分离特性的基础上,确定了采用萃取精馏的方式完成CO2分离,对比了三塔工艺和四塔工艺在各方面的差异性,并针对四塔工艺的相关参数进行了模拟优化。结果表明,四塔工艺可直接产出液态CO2,与三塔工艺相比,脱乙烷塔塔底的温度较低,CO2产量相对较高,综合能耗和比功耗相对较低,实现了CH4和液态CO2合格产品的双输出;多项工艺参数优化后,总能耗从1823 kW降低至1327 kW,降幅27.2%,CO2产品纯度从95.21%提升至99.12%。研究结果可为CCUS技术中碳捕集的循环利用提供理论依据和实际参考。 展开更多
关键词 CO2-C2H6二元体系 伴生气 萃取精馏 比功耗 产品纯度
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Solvent effects on infrared spectra of 2—Methyl—4,5—dimethoxy—3—oxo—2H—Pyridizine:Part 2.Binary Solvent SYstems 认领 引用
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作者 刘清 桑文强 《Journal of Zhejiang University Science》 2002年第5期559-562,共4页
This research on the solvent effects of 2 methyl 4,5 dimethoxy 3 oxo 2H pyridizine (MDOP) in binary solvent systems on the infrared spectra for MDOP in n hexane/CHCl 3 mixture solvents showed that there were three for... This research on the solvent effects of 2 methyl 4,5 dimethoxy 3 oxo 2H pyridizine (MDOP) in binary solvent systems on the infrared spectra for MDOP in n hexane/CHCl 3 mixture solvents showed that there were three forms of carbonyl stretching vibration band [ υ (C=O)] of MPOP as the mole fraction of CHCl 3 in the binary solvents changes. In pure n hexane solvent, the υ (C=O) of MDOP appeared at a relatively high wavenumber. With CHCl 3 added, the υ (C=O) shifted to lower wavenumbers. Two new bands were observed over a certain range of mixture solvent compositions. The origin of the bands was discussed in the terms of two kinds of hydrogen bond together with their individual dependence on mixture composition. Comparisons were drawn for the solvent sensitivities of υ (C=O) for propanone. 展开更多
关键词 Infrared spectra 2 methyl 4 5 dimethoxy 3 oxo 2H pyridizine Binary solvent effects Carbonyl stretching vibration
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Influence of Binary Oxidant (FeCl3:APS) Ratio on the Spectroscopic and Microscopic Properties of Poly(2,5-Dimethoxyaniline) 认领 引用 被引量：1
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作者 Rajiv K. Singh Amit Kumar +3 位作者 Khushboo Agarwal Deepshikha Dwivedi Keadar N. Sood Ramadhar Singh 《Open Journal of Polymer Chemistry》 2012年第3期105-112,共8页
Poly(2,5-dimethoxyaniline) (PDMA) has been synthesized by chemical oxidative polymerization technique using varying ratio (wt/wt) of binary oxidants;ferric chloride (FeCl3) and ammonium persulfate (APS). Fourier trans... Poly(2,5-dimethoxyaniline) (PDMA) has been synthesized by chemical oxidative polymerization technique using varying ratio (wt/wt) of binary oxidants;ferric chloride (FeCl3) and ammonium persulfate (APS). Fourier transform infrared (FT-IR) and ultraviolet-visible (Uv-vis) spectroscopic investigations provide the evidence of the presence of both benzenoid and quinoid ring units. The thermal analysis and structural characterization data suggests that the oxidant ratio greatly controls the molecular ordering in PDMA. Surface morphology shows the existence of both amorphous and crystalline domains wherein the crystalline domain size depends on the oxidant ratio. The dc conductivity (σdc) of PDMA is also a function of binary oxidant ratio and at FeCl3:APS (50:50), it increases by two orders of magnitude. Films of PDMA synthesized using FeCl3:APS (50:50) binary oxidant exhibits a decrease in the surface current on exposure to ammonia gas. 展开更多
关键词 Poly(2 5-Dimethoxyaniline) Binary Oxidant Structured Polymer DC Conductivity
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以MEA为主体的混合胺溶液对烧结烟气CO2吸收性能的研究 认领 引用 被引量：1
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作者 杨淑钦 王珲 +2 位作者 张文伯 董源 朱晓华 《环境工程》 CAS CSCD 2025年第9期157-164,共8页
我国的双碳目标对钢铁行业碳减排提出要求,钢铁行业的烧结工序碳排放占比达40%。目前对应用于工业行业的CO2吸收方法以化学吸收为主,而目前面对烧结烟气的化学吸收研究较少。针对于烧结烟气这种复杂烟气,需要更高效率的CO2吸收剂... 我国的双碳目标对钢铁行业碳减排提出要求,钢铁行业的烧结工序碳排放占比达40%。目前对应用于工业行业的CO2吸收方法以化学吸收为主,而目前面对烧结烟气的化学吸收研究较少。针对于烧结烟气这种复杂烟气,需要更高效率的CO2吸收剂,对代表性烧结机进行烧结烟气成分检测,结果表明:烧结烟气中CO2的浓度更低,SO2对CO2去除率的影响更大,SO2比NO2更容易与胺发生反应,SO2、NO2等杂质影响吸收效果。为探究不同化学吸收剂对烧结烟气中CO2的吸收率,以吸收剂的质量分数、温度为单因素控制得出最佳吸收工艺条件,实验确定采用吸收效率最高的30%MEA溶液为主胺,采用MEA-MDEA、MEA-PZ、MEA-K2CO33种二元复合溶液,以及MEA-PZ-MDEA三元复合溶液,分析其在不同参数条件下的CO2吸收性能。结果表明,吸收CO2性能的优劣顺序为MEA-PZ-MDEA、MEA-PZ、MEA-MDEA以及MEA-K2CO3。 展开更多
关键词 烧结烟气 二氧化碳 混合胺 吸收效率 二元混合物 三元混合物 化学吸收
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