Isobaric Vapor-Liquid Equilibrium of Binary Systems: p-Xylene+ (Acetic Acid, Methyl Acetate and n-Propyl Acetate) and Methyl Acetate+n-Propyl Acetate in an Acetic Acid Dehydration Process

doi:10.1016/S1004-9541(13)60455-3

Chinese Journal of Chemical Engineering ›› 2013, Vol. 21 ›› Issue (2): 171-176.DOI: 10.1016/S1004-9541(13)60455-3

Isobaric Vapor-Liquid Equilibrium of Binary Systems: p-Xylene+ (Acetic Acid, Methyl Acetate and n-Propyl Acetate) and Methyl Acetate+n-Propyl Acetate in an Acetic Acid Dehydration Process

黄秀辉¹, 钟伟民¹, 彭昌军², 钱锋¹

1 Key Laboratory of Advanced Control and Optimization for Chemical Processes, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China;
2 State Key Laboratory of Chemical Engineering and Department of Chemistry, East China University of Science and Technology, Shanghai 200237, China

收稿日期:2012-10-24 修回日期:2012-11-27 出版日期:2013-02-28 发布日期:2013-03-13
通讯作者: ZHONG Weimin, QIAN Feng
基金资助:
Supported by the Major State Basic Research Development Program of China (2012CB720500), the National Natural Science Foundation of China (U1162202, 61174118) and the Shanghai Leading Academic Discipline Project (B504).

Isobaric Vapor-Liquid Equilibrium of Binary Systems: p-Xylene+ (Acetic Acid, Methyl Acetate and n-Propyl Acetate) and Methyl Acetate+n-Propyl Acetate in an Acetic Acid Dehydration Process

HUANG Xiuhui¹, ZHONG Weimin¹, PENG Changjun², QIAN Feng ¹

1 Key Laboratory of Advanced Control and Optimization for Chemical Processes, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China;
2 State Key Laboratory of Chemical Engineering and Department of Chemistry, East China University of Science and Technology, Shanghai 200237, China

Received:2012-10-24 Revised:2012-11-27 Online:2013-02-28 Published:2013-03-13

摘要/Abstract

摘要： The vapor-liquid equilibrium data of four binary systems (acetic acid+p-xylene, methyl acetate+n-propyl acetate, n-propyl acetate+p-xylene and methyl acetate+p-xylene) are measured at 101.33 kPa with Ellis equilibrium still, and then both the NRTL and UNIQUAC models are used in combination with the HOC model for correlating and estimating the vapor-liquid equilibrium of these four binary systems. The estimated binary VLE results using correlated parameters agree well with the measured data except the methyl acetate+p-xylene system which easily causes bumping and liquid rushing out of the sampling tap due to their dramatically different boiling points. The correlation results by NRTL and UNIQUAC models have little difference on the average absolute deviations of temperature and composition of vapor phase, and the results by NRTL model are slightly better than those by UNIQUAC model except for the methyl acetate+n-propyl acetate system, for which the latter gives more accurate correlations.

关键词: vapor-liquid equilibrium, p-xylene, acetic acid, methyl acetate, n-propyl acetate, parameter correlation

Abstract: The vapor-liquid equilibrium data of four binary systems (acetic acid+p-xylene, methyl acetate+n-propyl acetate, n-propyl acetate+p-xylene and methyl acetate+p-xylene) are measured at 101.33 kPa with Ellis equilibrium still, and then both the NRTL and UNIQUAC models are used in combination with the HOC model for correlating and estimating the vapor-liquid equilibrium of these four binary systems. The estimated binary VLE results using correlated parameters agree well with the measured data except the methyl acetate+p-xylene system which easily causes bumping and liquid rushing out of the sampling tap due to their dramatically different boiling points. The correlation results by NRTL and UNIQUAC models have little difference on the average absolute deviations of temperature and composition of vapor phase, and the results by NRTL model are slightly better than those by UNIQUAC model except for the methyl acetate+n-propyl acetate system, for which the latter gives more accurate correlations.

Key words: vapor-liquid equilibrium, p-xylene, acetic acid, methyl acetate, n-propyl acetate, parameter correlation

黄秀辉, 钟伟民, 彭昌军, 钱锋. Isobaric Vapor-Liquid Equilibrium of Binary Systems: p-Xylene+ (Acetic Acid, Methyl Acetate and n-Propyl Acetate) and Methyl Acetate+n-Propyl Acetate in an Acetic Acid Dehydration Process[J]. Chinese Journal of Chemical Engineering, 2013, 21(2): 171-176.

HUANG Xiuhui, ZHONG Weimin, PENG Changjun, QIAN Feng . Isobaric Vapor-Liquid Equilibrium of Binary Systems: p-Xylene+ (Acetic Acid, Methyl Acetate and n-Propyl Acetate) and Methyl Acetate+n-Propyl Acetate in an Acetic Acid Dehydration Process[J]. Chin.J.Chem.Eng., 2013, 21(2): 171-176.

参考文献

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Isobaric Vapor-Liquid Equilibrium of Binary Systems: p-Xylene+ (Acetic Acid, Methyl Acetate and n-Propyl Acetate) and Methyl Acetate+n-Propyl Acetate in an Acetic Acid Dehydration Process

Isobaric Vapor-Liquid Equilibrium of Binary Systems: p-Xylene+ (Acetic Acid, Methyl Acetate and n-Propyl Acetate) and Methyl Acetate+n-Propyl Acetate in an Acetic Acid Dehydration Process

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