分离乙烯-乙烷的Cu-MCM-48介孔络合吸附剂的合成、表征及吸附平衡研究 |
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作者姓名: | 陈乐 刘晓勤 |
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作者单位: | State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China |
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基金项目: | Supported by the National Natural Science Foundation of China (20276029) and the Specialized Research Fund for the Doctoral Program of Higher Education of China (20040291005). |
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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.
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关 键 词: | mesoporous molecular sieve Cu-MCM-48 adsorption separation ethylene ethane |
收稿时间: | 2007-09-18 |
修稿时间: | 2007-9-18 |
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