Extension of Molecular Exchange Monte Carlo for the Prediction of Liquid-Liquid Equilibria in Gibbs Ensemble Monte Carlo Simulations.

IF 2.9 2区 化学 Q3 CHEMISTRY, PHYSICAL
Mohammad Soroush Barhaghi, Loren Schwiebert, Jeffrey J Potoff
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引用次数: 0

Abstract

The Molecular Exchange Monte Carlo (MEMC) algorithm is extended to support the calculation of liquid-liquid equilibria with Gibbs ensemble Monte Carlo (GEMC). The utility of the method is demonstrated through the application of constant-pressure GEMC simulations, using the Transferable Potentials for Phase Equilibria, to predict liquid-liquid coexistence curves for mixtures of perfluoroalkanes + alkanes and dimethyl ether + water. Good qualitative agreement is achieved between the predictions of the simulation and experiment; however, improvements to the intermolecular potentials used are required to achieve quantitative accuracy. Relative acceptance rates for molecule transfers up to 50 times greater than those obtained with standard configurational-bias Monte Carlo are obtained.

分子交换蒙特卡罗在Gibbs系综蒙特卡罗模拟液-液平衡预测中的推广。
将分子交换蒙特卡罗(MEMC)算法扩展到支持Gibbs系综蒙特卡罗(GEMC)计算液-液平衡。通过恒压GEMC模拟,使用相平衡的可转移势,来预测全氟烷烃+烷烃和二甲醚+水的混合物的液-液共存曲线,证明了该方法的效用。仿真结果与实验结果具有较好的定性一致性;然而,需要改进所使用的分子间电位以达到定量准确性。分子转移的相对接受率比用标准构型偏置蒙特卡罗获得的转移率高50倍。
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来源期刊
CiteScore
5.80
自引率
9.10%
发文量
965
审稿时长
1.6 months
期刊介绍: An essential criterion for acceptance of research articles in the journal is that they provide new physical insight. Please refer to the New Physical Insights virtual issue on what constitutes new physical insight. Manuscripts that are essentially reporting data or applications of data are, in general, not suitable for publication in JPC B.
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