Liquid-liquid equilibria of lactam containing binary systems
Liquid-liquid equilibria of lactam containing binary systems
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DOI：
10.1016/j.fluid.2008.02.008
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发表时间：
2008-04-25
影响因子：
2.6
通讯作者：
Leal, Jose M.
中科院分区：
文献类型：
--
作者：
Alcalde, Rafael;Aparicio, Santiago;Leal, Jose M.
本文研究了N-甲基-2-吡咯烷酮(NMP)+烃(正己烷、正辛烷、正环烷、环己烷、环辛烷、2-甲基戊烷、3-甲基戊烷、异辛烷、2，2-二甲基丁烷和2，3-二甲基丁烷)和N-环己基-2-吡咯烷酮(NCP)+水二元混合物在常压下的液液相平衡。除NCP+水外，其余体系均呈现上临界溶液温度(UCST)的混溶曲线。用两种不同的方法对NMP+烃混合物的结果进行了关联：(I)NRTL和UNIQUAC半经验模型和(Ii)基于分子的状态方程(统计缔合流体理论(SAFT)和扰动链统计缔合流体理论(PC-SAFT))。对于NRTL和UNIQUAC模型，推导了准确的关联，而对于SAFT和PC-SAFT，需要复杂的混合规则才能获得准确的结果。(C)2008爱思唯尔B.V.保留所有权利。
In this work, we report a study on the liquid-liquid phase equilibria for N-methyl-2-pyrrolidone (NMP)+ hydrocarbon (n-hexane, n-octane, n-clecane, cyclohexame, cyclooctane, 2-methylpentane, 3-methylpentane, isooctane, 2,2-dimethylbutane and 2,3-dimethylbutane) and N-cyclohexyl-2-pyrrolidone (NCP) + water binary mixtures at ambient pressure. The studied systems, except NCP + water, present miscibility curves with upper critical solutions temperatures (UCSTs). The results for NMP+hydrocarbon mixtures are correlated using two different approaches: (i) NRTL and UNIQUAC semiempirical models and (ii) molecular-based equations of state (statistical associating fluid theory (SAFT) and perturbed-chain statistical associating fluid theory (PC-SAFT)). Accurate correlations are inferred for NRTL and UNIQUAC models whereas for SAFT and PC-SAFT EOS complex mixing rules are required to obtain accurate results. (C) 2008 Elsevier B.V. All rights reserved.