High-pressure phase behavior and modeling of binary mixtures for alkyl acetate in supercritical carbon dioxide
High-pressure phase behavior and modeling of binary mixtures for alkyl acetate in supercritical carbon dioxide
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DOI：
10.1016/j.supflu.2005.10.007
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发表时间：
2006-05-01
影响因子：
3.9
通讯作者：
Lim, Jong-Sung
中科院分区：
文献类型：
--
作者：
Byun, Hun-Soo;Choi, Min-Yong;Lim, Jong-Sung
测定了CO2-乙酸甲酯、CO2-乙酸乙酯、CO2-乙酸丙酯、CO2-乙酸丁酯、CO2-乙酸戊酯和CO2-乙酸己酯二元体系在不同温度（313.2-393.2 ℃）和压力（16.45 MPa）下的高压相行为实验数据。这些CO2-乙酸甲酯、CO2-乙酸乙酯、CO2-乙酸丙酯、CO2-乙酸丁酯、CO2-乙酸戊酯和CO2-乙酸己酯混合物表现出I型相行为。在这项工作中，三个阶段没有观察到在任何温度下的系统。恒压条件下，乙酸甲酯、乙酸乙酯、乙酸丙酯、乙酸丁酯、乙酸戊酯和乙酸己酯在CO2-乙酸甲酯、CO2-乙酸乙酯、CO2-乙酸丙酯、CO2-乙酸丁酯、CO2-乙酸戊酯和CO2-乙酸己酯体系中的溶解度随温度的升高而增大。在每个体系中，混合物临界点随温度的升高而升高，混合物临界压力随分子量的增加而升高。用Peng-Robinson状态方程对计算结果进行了拟合。(c)2006 Elsevier B. V.保留所有权利。
Experimental data of high-pressure phase behavior were measured for binary CO2-methyl acetate, CO2-ethyl acetate, CO2-propyl acetate, CO2-butyl acetate, CO2-pentyl acetate and CO2-hexyl acetate systems at several temperatures (313.2-393.2 degrees C) and pressures up to 16.45 MPa. These CO2-methyl acetate, CO2-ethyl acetate, CO2-propyl acetate, CO2-butyl acetate, CO2-pentyl acetate and CO2-hexyl acetate mixtures exhibit type-I phase behavior. In this work, three phases were not observed at any temperature of the systems. The solubility of methyl acetate, ethyl acetate, propyl acetate, butyl acetate, pentyl acetate and hexyl acetate for the CO2-methyl acetate, CO2-ethyl acetate, CO2-propyl acetate, CO2-butyl acetate, CO2-pentyl acetate and CO2-hexyl acetate systems increase as the temperatures increase at constant pressure. In each system, the mixture-critical point shifts higher as the temperatures increase, and also the mixture-critical pressure does as molecular weight increases.The experimental results for CO2-alkyl acetate systems are modeled using the Peng-Robinson equation of state. A good fit of the calculated data is obtained with the Peng-Robinson equation of state. (c) 2006 Elsevier B.V. All rights reserved.