Molecular simulation of VLE and diffusion coefficient for aqueous solutions of 1-butyl-3-methylimidazolium bromide

辛绪亮

doi:10.3969/j.issn.0438-1157.2011.z2.003

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Molecular simulation of VLE and diffusion coefficient for aqueous solutions of 1-butyl-3-methylimidazolium bromide

更新时间：2025-12-10

- Molecular simulation of VLE and diffusion coefficient for aqueous solutions of 1-butyl-3-methylimidazolium bromide
- CIESC Journal Issue S2, Pages: 16-20(2011)
- 作者机构：
  
  大连理工大学化工与环境生命学部
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2011.z2.003
  CLC：
- Online First：20 December 2011，
  
  Published：20 December 2011
- 稿件说明：
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辛绪亮. Molecular simulation of VLE and diffusion coefficient for aqueous solutions of 1-butyl-3-methylimidazolium bromide[J]. CIESC Journal, 2011, (S2): 16-20.
DOI：

辛绪亮. Molecular simulation of VLE and diffusion coefficient for aqueous solutions of 1-butyl-3-methylimidazolium bromide[J]. CIESC Journal, 2011, (S2): 16-20. DOI： 10.3969/j.issn.0438-1157.2011.z2.003.

摘要

在Linux操作系统下采用Towhee软件和NPT-Gibbs系综Monte-Carlo方法（GEMC），模拟了不同温度、不同压力下二元体系［BMIM］Br+H2O的汽液相平衡性质。提出了一种修正介电常数的方法来计算长程力，所得结果与非极化模型、极化模型及实验结果进行了比较。结果表明：相比于极化模型和非极化模型，修正介电常数的计算结果更接近实验值。此外，采用DL_POLY软件和分子动力学模拟的方法对［BMIM］Br水溶液的扩散系数进行了计算。结果表明：随着溶液中水含量的增多，ILs阴阳离子以及水分子的扩散系数得到了明显的改善。

Abstract

Vapor liquid equilibrium of aqueous solution of ［BMIM］Br in different temperature and pressure were simulated by NPT-Gibbs Ensemble Monte Carlo(GEMC) method with Towhee packages by using Linux system. A modifying dielectric constant method was proposed to calculate the long-range force. The results of modifying dielectric constant method

polarizable and nonpolarizable models were compared with experimental results. The results show that compared to the polarizable and nonpolarizable models

the modifying dielectric constant method has better accuracy. In addition

molecular dynamics simulation on ［BMIM］Br aqueous solution was carried out with DL_POLY packages using Linux system

the diffusion coefficients of ［BMIM］ ion

Br-ion and water were calculated. The results indicate that with the increase of water content in the solution

the diffusion coefficients of ILs’ions and water are significantly improved.

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