分离乙稀-乙烷的Cu-MCM-48介阵络合吸附剂的合成、表征及吸附平衡研究

TQ42; Copper incorporated MCM-48 molecular sieve adsorbents with different Cu content have been hydrothermally synthesized.The samples have been characterized by vmous physicochemical methods,including X-ray difrraction(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 isotherlnS 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一48 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 ofethylene adsorbed is 11.1 ml·g-1.