SCI和EI收录∣中国化工学会会刊

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

• SEPARATION SCIENCE & ENGINEERING • Previous Articles     Next Articles

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

CHEN Le, LIU Xiaoqin   

  1. 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)

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

陈乐, 刘晓勤   

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

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

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