Vapor-liquid equilibrium for methanol-formaldehyde-polyoxymethylene dimethyl ethers ternary system

被引：0

作者：

Li P. ^{[1
]}

Kong H. ^{[1
]}

Song Z. ^{[1
]}

Zhang Z. ^{[1
]}

Wang Y. ^{[1
]}

机构：

[1] College of Chemical Engineering, China University of Petroleum, Qingdao, 266580, Shandong

来源：

Huagong Xuebao/CIESC Journal | 2020年 / 71卷

关键词：

Formaldehyde; Methanol; PODE[!sub]2[!/sub; Thermodynamic model; Vapor-liquid equilibrium;

D O I：

10.11949/0438-1157.20190440

中图分类号：

学科分类号：

摘要：

Polyoxymethylene dimethyl ether (PODEn) is a kind of compound with high oxygen content, which is developing to be a high quality diesel additive in recent years. At a constant pressure of 101.3 kPa, the vapor-liquid equilibrium data of methanol-formaldehyde-PODE2 ternary system was determined using the improved vapor-liquid equilibrium double cycle Rose kettle. Based on maximum-likelihood method, the measured ternary vapor-liquid equilibrium data were correlated by NRTL, Wilson, and UNIQUAC activity coefficient model with Aspen Plus software. And the corresponding binary interaction parameters and simulated calculation values of the three models are obtained respectively. By comparing the calculation value of three models with experimental value, the average absolute deviation in boiling point and vapor-phase composition were determined, which were less than 1.10 K, 0.0250 and 0.0240, respectively. The correlation results of the three models are applicable to the system, and the obtained binary interaction parameters can be applied to the distillation design of the methanol-formaldehyde-PODE2 ternary system, laying a data foundation for the industrial separation optimization of the related matter system. © All Right Reserved.

引用

页码：7 / 14

页数：7

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