1-乙烯基咪唑改性PVC分离CO2/CH4的吸附、渗透和DFT研究

IF 1.4 Q3 CHEMISTRY, MULTIDISCIPLINARY
Narmin Noorani, Abbas Mehrdad
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引用次数: 5

摘要

为了改善聚氯乙烯膜的气体分离性能,采用自由基接枝共聚的方法将1-乙烯基咪唑接枝到聚氯乙烯膜上。用元素分析技术(CHN)对接枝共聚物的合成进行了表征。用扫描电子显微镜(SEM)观察了制备的膜的形貌。用石英晶体微量天平(QCM)研究了不同温度和压力下CO2吸附的热力学性质。实验数据通过双模模型进行关联。计算的CO2吸附热力学参数表明,CO2吸附具有放热性质。此外,还测量了甲烷和二氧化碳的透气性。考察了温度和进料压力的变化对膜性能的影响。温度的升高导致膜对二氧化碳/甲烷气体的选择性降低;同时,膜的选择性随着进料压力的增加而增加。结果表明,接枝共聚物对CO2/CH4气体的渗透选择性高于聚氯乙烯膜。此外,密度泛函理论(DFT)计算证实了接枝共聚物与CO2的相互作用能强于CH4的相互作用能量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Modification of PVC with 1-Vinylimidazole for CO2/CH4 Separation: Sorption, Permeation and DFT Studies
To improve the gas separation performance of poly (vinyl chloride) membrane, 1-vinyl imidazole was grafted onto the poly (vinyl chloride) by free radical graft copolymerization. The synthesized of the graft copolymer was characterized by the elemental analyzer technique (CHN). The prepared membrane morphology was surveyed by Scanning Electron Microscope (SEM). The properties of thermodynamics of CO2 adsorption were investigated at various temperatures and pressures by quartz crystal microbalance (QCM). The experimental data were correlated by the dual-mode model. The calculated thermodynamics parameters of CO2 adsorption display that CO2 adsorption has the nature of exothermic. Also, methane and carbon dioxide gas permeability was measured. The effects of variation of temperature and feed pressure on the membrane performance were surveyed. The increment in temperature cause to decrement the selectivity of membrane for carbon dioxide/methane gases; whiles, the selectivity of the membrane was incremented by incrementing feed pressure. The outcomes indicate that the permeation selectivity of the grafted copolymer is more than those of the poly (vinyl chloride) membrane for CO2/CH4 gasses. Moreover, Density functional theory (DFT) computes corroborated that the interaction energy of grafted copolymer with CO2 is stronger than this of CH4.
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来源期刊
Physical Chemistry Research
Physical Chemistry Research CHEMISTRY, MULTIDISCIPLINARY-
CiteScore
2.70
自引率
8.30%
发文量
18
期刊介绍: The motivation for this new journal is the tremendous increasing of useful articles in the field of Physical Chemistry and the related subjects in recent years, and the need of communication between Physical Chemists, Physicists and Biophysicists. We attempt to establish this fruitful communication and quick publication. High quality original papers in English dealing with experimental, theoretical and applied research related to physics and chemistry are welcomed. This journal accepts your report for publication as a regular article, review, and Letter. Review articles discussing specific areas of physical chemistry of current chemical or physical importance are also published. Subjects of Interest: Thermodynamics, Statistical Mechanics, Statistical Thermodynamics, Molecular Spectroscopy, Quantum Chemistry, Computational Chemistry, Physical Chemistry of Life Sciences, Surface Chemistry, Catalysis, Physical Chemistry of Electrochemistry, Kinetics, Nanochemistry and Nanophysics, Liquid Crystals, Ionic Liquid, Photochemistry, Experimental article of Physical chemistry. Mathematical Chemistry.
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