常压下甲醇-正丁醇相平衡的测定与关联  

Determination and correlation of phase equilibrium about methanol-n-butanol at atmospheric pressure

作　　者：赵金和 谭周英 郭效瑛 金长义 ZHAO Jin-he;TAN Zhou-ying;GUO Xiao-ying;JIN Chang-yi(College of Chemistry and Environment Engineering,Baise University,Baise 533000,Guangxi,China;Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology,Nanning 530004,Guangxi,China)

机构地区：[1]百色学院化学与环境工程学院,广西百色533000 [2]广西石化资源加工及过程强化技术重点实验室,广西南宁530004

出　　处：《化学工程》2020年第11期53-56,61,共5页Chemical Engineering(China)

基　　金：2018年度广西高校中青年教师基础能力提升项目(2018KY0577);2016广西石化资源加工及过程强化技术重点实验室开放基金(2016k008);百色学院骨干教师发展工程资助项目(百院字[2019]70号)。

摘　　要：为了更好地理解丁醇微乳化剂对甲醇改性柴油的的作用原理,助推混合燃料的快速发展,常压下开展了主要组分甲醇-正丁醇二元组分相平衡的测定工作。该测定工作基于溶液折射率与组成(质量分数)之间存在良好的线性关系,采用了操作较为简便的折射率法,装置为类似于Rose汽液平衡釜的双液系的沸点仪。实验数据通过Herington面积积分法热力学一致性检验。分别采用Wilson、NRTY、UNIFAC活度系数模型对该体系的相平衡进行关联模拟,3个模型关联的相平衡温度最大平均偏差为1.874 K,汽相组成的最大平均偏差为0.0981,其中Wilson模型与实验数值最为吻合。折射率法测定甲醇-正丁醇体系相平衡简便可行,Wilson模型关联该体系更为合适。In order to better understand the action principle of butanol microemulsifier on methanol modified diesel and promote the rapid development of hybrid fuel,the phase equilibrium of the main binary components methanol-n-butanol was measured under atmospheric pressure.Based on the good linear relationship between the refractive index and mass fraction in solution,a refractive index method which was relatively easy to operate was adopted,and the device was a two-liquid boiling point apparatussimilar to Rose vapor-liquid equilibrium kettle.The experimental data were tested for thermodynamic consistency by Herington area integration method.The Wilson,NRTY,and UNIFAC activity coefficient models were used to correlate and simulate the phase equilibrium of the system to the phase balance.The maximum average deviation of phase equilibrium temperature of the three models is 1.874 K,the maximum average deviation of the vapor phase mole composition was 0.0981,and Wilson model was the most consistent with the experimental datum.It is simple and feasible to determine the phase equilibrium of methanol-n-butanol system by refractive index method,and Wilson model is more suitable to correlate the system.

关 键 词：甲醇 正丁醇 汽液平衡 热力学一致性检验 

分 类 号：TQ207[化学工程—有机化工]