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非对称烃类体系高压汽液平衡的预测

Prediction of Vapor-Liquid Equilibria at High Pressure for Asymmetric Hydrocarbon Systems
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摘要 本文基于London色散力理论和Pitzer对比态原理等统计力学基础提出了一个RKS方程改进的混合规则,进而导出一个非对称烃类体系通用二元相互作用参数的表达式:使用该RKS方程改进的混合规则,较满意地预测了21个非对称烃类的高压汽液平衡,从而显著地提高了原RKS方程假定K_(ij)=0时的预测精度。 A modified mixing rule for RKS equation of state is proposed based on London's theory of dispersion and Pitzer's corresponding states rule. An universal binary interaction parameter for asymmetric hydrocarbon mixtures is presented as follows: g_(ij) =[(T_(ci),T(cj))~0.5/(T_(ci) + T_(cj))/2]~0.5 RKS equation of state with the modified mixing rule can successfully predict vapor-liquid equilibria at high pressure for 21 hydrocarbon systems and improve prediction accuracy of RKS equation using K_(ij) =0.
作者 高光华
机构地区 清华大学化工系
出处 《高校化学工程学报》 EI CAS CSCD 1992年第4期285-289,共5页 Journal of Chemical Engineering of Chinese Universities
关键词 非对称烃类 高压 汽液平衡 Vapor-liquid equilibria, Asymmetric hydrocarbon systems, High pressure
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