Olefin-Paraffin Separation Using Calcium-ETS-4

被引：19
作者：
Grande, Carlos A. [1 ]
Lind, Anna [1 ]
Vistad, Ornulv [1 ]
Akporiaye, Duncan [1 ]
机构：
[1] SINTEF Mat & Chem, N-0314 Oslo, Norway
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2014年 / 53卷 / 40期
关键词：
PRESSURE SWING ADSORPTION; MOLECULAR-SIEVE; METHANE; DIFFUSION; NITROGEN; ETS-4;
D O I：
10.1021/ie5004703
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The properties of calcium-modified ETS-4 are studied focusing on olefinparaffin separation by PSA (Pressure Swing Adsorption), specifically a stream containing CH4/C2H6/C2H4. The effect of activation temperature of Ca-ETS-4 is studied to perform a kinetic separation, with the aim of excluding paraffin molecules from the pores. Adsorption isotherms of pure CH4, C2H6, and C2H4 were measured at 303 K after activating the sample at different temperatures (from 463583 K). Furthermore, pulse chromatography of single gases at 303 K was carried out after different activation temperatures to determine the heating effect on diffusion of pure gases. Aiming to develop a faster procedure to determine optimal activation temperature for alkali-exchanged ETS-4, a correlation between changes in the crystal lattice parameters from in situ XRD and the diffusion constant has been established for Ca-ETS-4.
引用
收藏
页码：15522 / 15530
页数：9
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