铜-胺改性ZSM-5吸附剂的制备及其对NO_x的净化机理  

Adsorption mechanism of NO_x by ZSM-5 zeolite modified with copper and amine

作　　者：张惠[1,2] 王喜芹[2] 栾志强[2] 宋怀河[1] 叶平伟[2] 李凯[2] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029 [2]防化研究院,北京100191

出　　处：《环境工程学报》2013年第12期4887-4890,共4页Chinese Journal of Environmental Engineering

基　　金：国家高技术研究发展计划(863)项目(2012AA063101)

摘　　要：以ZSM-5分子筛粉体为原料,成型后负载铜盐和有机胺改性,制备出一种高效脱除氮氧化物的吸附剂。通过改变铜盐、有机胺的含量以及铜盐活化温度使吸附剂的性能得到优化,在实验条件下(NO2初浓度1 000 mg/m3,气流2.7L/min)床层对NO2动态吸附的透过时间由改性前的3 min提高到90 min,并使NO气体的释放得到有效减缓。通过动态吸附实验研究了NO释放时间在负载前后的变化,通过X射线光电子能谱(XPS)和红外分析(FTIR)研究了吸附剂表面铜元素、有机基团等在吸附前后的变化规律,提出了可能的净化机理。A kind of absorbent which can effectively adsorb NO2 was obtained by modifying ZSM-5 zeolite with copper compound and amine. Adsorption of NO2 and the retention of NO （the byproduct of NO2 reduction） on the materials modified with various contents of copper compound and amine and under different activation temperatures of the copper compound were studied. The dynamic adsorption experiment showed that the break-through time was about 90 min and the absorbent could slow down the release of NO. A possible absorption mechanism was proposed according to the characterization of X-ray photoelectron spectroscopy （XPS） and Fourier transform infrared （FTIR）.

关 键 词：ZSM-5分子筛 负载 动态吸附 氮氧化物 净化机理 

分 类 号：X511[环境科学与工程—环境工程]