Adsorption of ethane and ethylene on modified ETS-10

被引：107
作者：
Anson, A. [1 ]
Wang, Y. [1 ]
Lin, C. C. H. [1 ]
Kuznicki, T. M. [1 ]
Kuznicki, S. M. [1 ]
机构：
[1] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2G6, Canada
来源：
CHEMICAL ENGINEERING SCIENCE | 2008年 / 63卷 / 16期
基金：
加拿大自然科学与工程研究理事会;
关键词：
adsorption; desorption; gases; ion exchange; selectivity; separations; zeolites;
D O I：
10.1016/j.ces.2008.05.038
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Ethylene and ethane adsorption isotherms were measured for Engelhard Titanosilicate (ETS-10) both as made in the sodium form and ion exchanged with different mono-, di-, and trivalent cations. Isotherms for Na-, K-, and Ag-ETS-10 were found to be nearly rectangular indicating very strong adsorption. In contrast, isotherms for Li-, Ba-, and Cu-ETS-10 show substantial curvature. Isotherms for some mixed cation forms (such as Ba/H and La/H) demonstrate the weakest adsorption with substantial adsorption swing capacity between 1 and 200 kPa. Using the ideal adsorption solution theory (IAST), it was determined that ethylene/ethane adsorption selectivity decreases in the order Na > K > Li > Cu approximate to Ba > Ba/H > La/H, while the adsorption swing capacity (from 1 to 200 kPa) shows an exactly reversed trend. It is thus probable to find the right balance between selectivity and swing capacity in order to design appropriate pressure swing adsorption (PSA) processes for the separation of ethylene and ethane under a wide range of conditions. (C) 2008 Elsevier Ltd. All rights reserved.
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收藏
页码：4171 / 4175
页数：5
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