π-Complexation Mesoporous Adsorbents Cu-MCM-48 for Ethylene-Ethane Separation

›› 2008, Vol. 16 ›› Issue (4): 570-574.

π-Complexation Mesoporous Adsorbents Cu-MCM-48 for Ethylene-Ethane Separation

陈乐, 刘晓勤

State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China

收稿日期:2007-09-18 修回日期:2008-03-14 出版日期:2008-08-28 发布日期:2008-08-28
通讯作者: LIU Xiaoqin, E-mail: liuxq@njut.edu.cn
基金资助:
the National Natural Science Foundation of China(20276029);the Specialized Research Fund for the Doctoral Program of Higher Education of China(20040291005)

π-Complexation Mesoporous Adsorbents Cu-MCM-48 for Ethylene-Ethane Separation

CHEN Le, LIU Xiaoqin

State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China

Received:2007-09-18 Revised:2008-03-14 Online:2008-08-28 Published:2008-08-28
Supported by:
the National Natural Science Foundation of China(20276029);the Specialized Research Fund for the Doctoral Program of Higher Education of China(20040291005)

摘要/Abstract

摘要： Copper incorporated MCM-48 molecular sieve adsorbents with different Cu content have been hydrothermally synthesized. The samples have been characterized by various physicochemical methods, including X-ray diffraction (XRD), nitrogen adsorption (N₂) and X-ray photoelectron spectroscopy (XPS). The results reveal that Cu-MCM-48 with mass fraction of copper up to 10% can still retain the uniform mesoporous framework of MCM-48. The copper in the framework of MCM-48 was easily auto-reduced to Cu(I) in N₂ at high temperature, which did not alter the mesoporous structure of MCM-48. The adsorption equilibrium isotherms of ethylene and ethane on these molecular sieve adsorbents have been measured at 30℃. At 100 kPa, the adsorption capacities of ethylene on 5Cu-MCM-48 and 10Cu-MCM-48 are higher than those on MCM-48. The 10Cu-MCM-48 molecular sieve adsorbent has a higher selective adsorption ratio of ethylene to ethane, the separation factor is 3.8, and the amount of ethylene adsorbed is 11.1 ml·g^-1.

关键词: mesoporous molecular sieve, Cu-MCM-48, adsorption separation, ethylene, ethane

Abstract: Copper incorporated MCM-48 molecular sieve adsorbents with different Cu content have been hydrothermally synthesized. The samples have been characterized by various physicochemical methods, including X-ray diffraction (XRD), nitrogen adsorption (N₂) and X-ray photoelectron spectroscopy (XPS). The results reveal that Cu-MCM-48 with mass fraction of copper up to 10% can still retain the uniform mesoporous framework of MCM-48. The copper in the framework of MCM-48 was easily auto-reduced to Cu(I) in N₂ at high temperature, which did not alter the mesoporous structure of MCM-48. The adsorption equilibrium isotherms of ethylene and ethane on these molecular sieve adsorbents have been measured at 30℃. At 100 kPa, the adsorption capacities of ethylene on 5Cu-MCM-48 and 10Cu-MCM-48 are higher than those on MCM-48. The 10Cu-MCM-48 molecular sieve adsorbent has a higher selective adsorption ratio of ethylene to ethane, the separation factor is 3.8, and the amount of ethylene adsorbed is 11.1 ml·g^-1.

Key words: mesoporous molecular sieve, Cu-MCM-48, adsorption separation, ethylene, ethane

陈乐, 刘晓勤. π-Complexation Mesoporous Adsorbents Cu-MCM-48 for Ethylene-Ethane Separation[J]. , 2008, 16(4): 570-574.

CHEN Le, LIU Xiaoqin. π-Complexation Mesoporous Adsorbents Cu-MCM-48 for Ethylene-Ethane Separation[J]. , 2008, 16(4): 570-574.

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π-Complexation Mesoporous Adsorbents Cu-MCM-48 for Ethylene-Ethane Separation

π-Complexation Mesoporous Adsorbents Cu-MCM-48 for Ethylene-Ethane Separation

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