硅改性制备疏水性沸石分子筛蜂窝体  

Preparation of Honeycombed Monolithic Zeolite and Hydrophobic Modification with SiCl_4

作　　者：王喜芹[1] 李凯[1] 魏冰[2] 栾志强[1] 

机构地区：[1]防化研究院,北京100191 [2]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《环境科学》2011年第12期3653-3656,共4页Environmental Science

基　　金：国家高技术研究发展计划(863)项目(2006AA06A310)

摘　　要：通过氢型沸石分子筛粉体与粘结剂、助剂和水混合成面团状后挤压成型,干燥焙烧,再通过四氯化硅疏水改性处理,制备了一种蜂窝状复合沸石分子筛吸附剂.通过低温N2吸附、XRD、吸苯等手段对所制备的分子筛蜂窝体进行表征和评价.结果表明所制备的复合沸石分子筛蜂窝体经过硅改性处理后,硅铝比由4提高至22,比表面和总孔容略降,P/P0=0.95时吸苯量比改性前稍高,达18.05%.相对湿度80%RH条件下(P/P0=0.95)苯的饱和吸附量还能达到15%,与改性前相比增加了1倍多,疏水性优良.A kind of hydrophobic zeolitic monolith were prepared by mixing HY/ZSM-5,additives and water,followed by processes of extrusion and drying,and then hydrophobic modification with SiCl4.The structures and properties of the adsorbent were examined by nitrogen adsorption and desorption measurement,XRD,and benzene adsorption experiment.The results show that those adsorbents possess hierarchical pore structures and excellent hydrophobicity.

关 键 词：沸石 蜂窝体 吸附剂 疏水改性 四氯化硅 

分 类 号：X701[环境科学与工程—环境工程]