SRK状态方程计算CH_3Cl-n-C_6H_(14)二元体系气液相平衡  

Gas-Liquid Phase Equilibrium of Methyl Chloride-n-Hexane Binary System Calculated by SRK State Equation

作　　者：商育伟[1] 张艳[2] 郭文莉[1] 李树新[1] 

机构地区：[1]北京石油化工学院材料科学与工程系,北京102617 [2]北京化工大学化学工程学院,北京100029

出　　处：《石油化工高等学校学报》2008年第2期55-58,共4页Journal of Petrochemical Universities

基　　金：中国石油化工股份有限公司北京燕山分公司资助项目(4J0006);北京市教委资助项目(KM200510017002)

摘　　要：利用液相单循环气液相平衡釜对一氯甲烷-正己烷二元体系气液相平衡进行测定,利用SRK状态方程对实验数据进行回归并拟合出二元交互作用参数kij,其值为0.05。CH3Cl的液相组成随着温度的升高而减小,随着压力的升高而增大。CH3Cl气相组成的平均标准偏差为1.0764%,总压的平均标准偏差为0.9854%,说明SRK状态方程在拟合一氯甲烷-正己烷气液相平衡方面是精确的。在此基础上,对一氯甲烷-正己烷二元体系的全浓度范围内的气液相平衡数据进行了计算,得到了25,30,40,50℃时二元体系的p-x,y相图。Gas- liquid phase equilibrium data of methyl chloride-n- hexane binary system was measured by phase equilibrium apparatus in which liquid circulates. Experimental data was regressed and Binary parameter of methyl chloride and n-hexane kij was calculated by SRK state equation,which is 0.05. It was found that liquid phase constitute of methyl chloride in n- hexane decreases with the increase of temperature, but increases with the increase of pressure. The average standard deviation of CH3Cl gas constitute was 1. 076 4% and the average standard deviation of pressure was 0. 985 4%, which explain SRK state equation is accurate in regressing gas-liquid phase equilibrium data. Basing on it, gas-liquid phase equilibrium data of methyl chloride-n-hexane binary system in all concentration range were calculated, p-x,y phase graph at 25,30,40,50 ℃ was obtained.

关 键 词：一氯甲烷 正己烷 相平衡 SRK状态方程 

分 类 号：TQ013.1[化学工程]