In situ FTIR investigation of the solubility and swelling of model epoxides in supercritical CO2
In situ FTIR investigation of the solubility and swelling of model epoxides in supercritical CO2
复制标题
DOI：
10.1016/j.supflu.2011.12.015
复制
发表时间：
2012-03-01
影响因子：
3.9
通讯作者：
Tassaing, Thierry
中科院分区：
文献类型：
--
作者：
Foltran, Stephanie;Cloutet, Eric;Tassaing, Thierry
二氧化碳/环氧化物混合物的相行为已被调查，使用一个有效的原位FTIR方法，使我们能够确定在两个阶段（富CO2相和富环氧化物相）作为温度和压力的函数的每个组件的浓度的演变。测量已经在三个不同的温度（40、70和100 ℃）下进行，压力范围在0.1和20 MPa之间。我们选择了环氧丙烷（PO），氧化苯乙烯（SO）和氧化环己烯（CO）分子，它们被广泛用于合成环状碳酸酯。因此，我们已经确定了这些环氧化物在超临界CO2中的溶解度以及CO2吸附和由此产生的富含环氧化物的相的溶胀。从这些浓度测量，我们可以建立这些环氧/CO2二元混合物的压力-组成相图。(C)2012 Elsevier B. V.保留所有权利。
The phase behavior of carbon dioxide/epoxide mixtures has been investigated using an efficient in situ FTIR method that allows us determining the evolution of the concentration of each component in the two phases (CO2-rich phase and epoxide-rich phase) as a function of temperature and pressure. The measurements have been performed for three different temperatures (40,70 and 100 degrees C) for pressures ranging between 0.1 and 20 MPa. We have selected propylene oxide (PO), styrene oxide (SO) and cyclohexene oxide (CO) molecules that are widely used in the synthesis of cyclic carbonates. Thus, we have determined the solubility of these epoxides in supercritical CO2 as well as the CO2 sorption and the resulting swelling of the epoxide rich phase. From these concentration measurements, we could establish the pressure-composition phase diagram of these epoxide/CO2 binary mixtures. (C) 2012 Elsevier B.V. All rights reserved.