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分子动力学模拟噻吩/正庚烷在PEG膜中溶解-扩散行为 被引量:2

Molecular Dynamics Simulation Studies on Sorption and Diffusion Properties of Thiophene/Heptane in PEG Membranes
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摘要 采用分子动力学方法模拟汽油组分在聚乙二醇(PEG)膜中的溶解-扩散行为。吸附动力学模拟结果表明,动力学平衡之后,噻吩与聚合物表面距离明显缩短。PEG对噻吩与正庚烷的吸附能分别为-52.17 kJ/mol和-38.00 kJ/mol。PEG对噻吩的吸附能小于正庚烷,因而PEG对噻吩具有吸附选择性。扩散动力学模拟结果表明,在不同温度下,噻吩的扩散系数均高于正庚烷,PEG对噻吩具有扩散选择性,与实验结果相符。 In this paper, molecular dynamics simulations were used to estimate the sorption-diffusion properties of gasoline components in polyethylene glycol (PEG) membranes. The result of sorption simulation indicates that the distance between thiophene and the surface of PEG is shorten after simulation, the adsorption energies of thiophene and heptane are - 52.17 kJ/mol and - 38.00 kJ/mol. The adsorption energy of thiophene is lower than of heptane. The result of diffusion simulation suggestes that the diffusion coefficient constants of thiophene are higher at all simulation temperature, which is consisted with the experiment results.
出处 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2012年第3期114-117,共4页 Polymer Materials Science & Engineering
基金 教育部新世纪优秀人才培育计划(NCET-06-0605) 教育部创新团队"重质油高效转化的绿色化学与工程" 教育部高等学校博士学科点专项科研基金(20090133120008) 山东省自然科学基金资助项目(ZR2009BQ011) 中国博士后科学基金项目(20070420119 200801218) 中石化科技攻关课题(107022) 中空纤维膜材料与膜过程省部共建国家重点实验室培育基地开放基金(201042)
关键词 分子动力学 汽油脱硫 渗透汽化 膜分离 molecular dynamics gasoline desulphurization pervaporation membranes separation
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参考文献7

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