High-pressure phase behavior of the quaternary system (carbon dioxide plus dichloromethane plus ε-caprolactone plus poly(ε-caprolactone): Experimental data and PC-SAFT modeling

被引：4
|
作者：
Santos, Nilson G. O. [1 ]
Rebelatto, Evertan A. [1 ]
Mayer, Diego A. [1 ]
Lanza, Marcelo [1 ]
Oliveira, J. Vladimir [1 ]
机构：
[1] Univ Fed Santa Catarina, Dept Chem & Food Engn, POB 476, BR-88040900 Florianopolis, SC, Brazil
来源：
FLUID PHASE EQUILIBRIA | 2022年 / 554卷
关键词：
Lactones; Phase equilibria; Supercritical fluids; Polymerization reaction; RING-OPENING POLYMERIZATION; PERTURBED-CHAIN SAFT; CARBON-DIOXIDE; ENZYMATIC-SYNTHESIS; EQUILIBRIUM DATA; TERNARY-SYSTEM; EQUATION; STATE;
D O I：
10.1016/j.fluid.2021.113306
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The phase behavior of the system containing carbon dioxide + dichloromethane + epsilon- caprolactone + poly(epsilon-caprolactone) was studied in order to get important information to understand the polymerization reaction in a high-pressure system. The experiments were performed using a variable-volume view cell over the temperature range from 323.15 to 353.15 K. The mass ratio between dichloromethane: (epsilon- caprolactone + poly(epsilon-caprolactone)) mixture was kept fixed at 1:1 with different poly(epsilon-caprolactone) mass fractions (reaction conversion) from 0.0 up 15.0 wt%. The mass composition of supercritical carbon dioxide varied in relation to the dichloromethane + epsilon- caprolactone + poly(epsilon- caprolactone) mixture from 60.0 to 77.5 wt% on dichloromethane free basis. Phase transitions of vapor liquid bubble point type (VLE-BP) and liquid-liquid (LLE) were verified and lower critical solution temperature (LCST) behavior in P-W and P-T diagrams was observed. The experimental results were modeled using the PC-SAFT EoS, providing a positive representation of the experimental phase equilibrium data. (C) 2021 Elsevier B.V. All rights reserved.
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页数：11
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