化学改性对膨润土吸附气态汞的影响  

Hg Vapor Adsorption of Modified Bentonite

作　　者：高洪亮[1] 王向宇[1] 周劲松[2] 骆仲泱 

机构地区：[1]郑州大学化学系 [2]浙江大学能源洁净利用国家重点实验室,浙江杭州310027

出　　处：《锅炉技术》2008年第4期72-76,共5页Boiler Technology

基　　金：国家自然科学基金(50476056);国家863计划项目(2005AA520080)

摘　　要：为了获得消耗量小、性能高效的烯煤烟气脱汞吸附剂,采用活性MnO2浸渍和FeCl3浸渍对膨润土进行了改性,制得两种改性膨润土吸附剂。采用固定床吸附的方式,对吸附剂在不同条件下的吸附效果进行了测试,发现活性MnO2浸渍膨润土和原膨润土吸附剂相比,它对汞蒸气的吸附能力有较大提高,有效吸附时间大大增加,在有效吸附时间内,穿透率大大降低。改性后的膨润土吸附能力大大提高的原因在于,改性膨润土在吸附过程中,除了物理吸附,还发生了化学吸附。Two modified bentonites were prepared by chemical methods including impregnated with MnO2 and impregnated with FeCl3. A bench-scale testing apparatus was constructed to evaluate the efficiency of mercury adsorbents with fixed bed. The reactive MnO2-impregnated adsorbent was selected out, After analyzing the adsorbent mechanism of modified bentonite, it is believed that there is chemical adsorption other than physical adsorption during the adsorption process of modified bentonite.

关 键 词：汞控制 改性膨润土 固定床 汞 吸附 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程]