过渡金属离子改性MCM-41对乙烯吸附的影响  

Ethylene adsorption onto modified MCM-41 by transition metals through ion exchange method

作　　者：马晓东[1] 欧阳峰[1] 申东美[1] 曹小凯[1] 

机构地区：[1]哈尔滨工业大学深圳研究生院,深圳518055

出　　处：《环境工程学报》2013年第10期4038-4043,共6页Chinese Journal of Environmental Engineering

基　　金：深圳市"双百计划"(2008)

摘　　要：为了提高吸附剂对乙烯气体的吸附量,对常见的MCM-41分子筛进行了过渡金属离子改性研究。通过镍离子交换实验,确定了改性条件,改性后的样品对乙烯的吸附行为发生改变。使用镍离子改性后的MCM-41在常温常压下对乙烯的最大吸附量为可达416 cm3/g,约为商用颗粒活性炭的6倍,远高于其他文献的报道。吸附质的检测结果说明乙烯在其吸附过程中发生多聚反应,高碳数的直链烯烃为最终产物。CO原位红外吸附的引入证实经过热处理后,一价镍能在镍离子改性后的MCM-41样品中形成并成为乙烯聚合反应的活性中心。In order to enhance the adsorption capacity of ethylene onto MCM-41, nickel was used to modify the adsorbent through ion exchange method. The proper procedure was confirmed during ion exchange and the modified sample showed different adsorptional characteristics. The largest adsorption capacity of ethylene onto Ni/MCM-41 was 416 cm3/g, which was about 6 times higher than commercial activated carbon. The GC-MS re- suits confirmed that polymerization occurred during the adsorption process and the final adsorbates were high-car- bon-number linear alkenes. The in-situ FTIR results of CO adsorption showed that Ni ＋ formed after thermal treat- ment and became the active center of ethylene polymerization.

关 键 词：乙烯 吸附 过渡金属 离子交换 

分 类 号：X511[环境科学与工程—环境工程]