温度对改性矿物吸附剂脱除气态汞影响  

Effect of temperature on removing mercury vapor with modified mineral adsorbent

作　　者：崔夏[1] 马丽萍[1] 张杭[1] 毛宇[1] 谢龙贵[1] 

机构地区：[1]昆明理工大学环境科学与工程学院,昆明650093

出　　处：《环境工程学报》2012年第12期4596-4602,共7页Chinese Journal of Environmental Engineering

基　　金：教育部留学回国人员启动基金资助项目(50869003)

摘　　要：以蛭石、丝光沸石、膨润土及经改性后各物质为吸附剂,N2气氛下,在固定床实验台上进行了对烟气中单质汞脱除的实验研究,主要考察了温度的改变对改性矿物吸附剂脱除气态汞的影响。研究结果显示,膨润土、蛭石对汞的吸附基本不受温度的影响;未改性的吸附剂对汞的吸附能力均比较差;温度的提高有利于改性吸附剂对单质汞的脱除,说明改性后的吸附剂的脱汞过程以化学吸附为主;真正起作用的活性组分CeO2占据了丝光沸石的大部分表面积和空隙;丝光沸石经CuO改性前后吸附能力几乎未发生变化。A laboratory-scale fixed-bed reactor system was used to screen some sorbents （natural vermicu- lite, mordenite, bentonite and chemically modified sorbents） for their capability to remove elemental mercury from flue gas. The characterization of all sorbents was analyzed by the accelerated surface area porosity. Conclu- sively, the temperature almost had no effect on adsorption capacity of natural vermiculite, mordenite and benton- ite. Natural sorbents had lower adsorption capacity. Appropriately increasing the chemically modified adsorption temperature improves the mercury removal, it suggests that their main sorption mechanism should be ehemisorp- tions. The activity comment CeO2 takes up a majority of surface area and porosity of mordenite, and it may play a key role. However, the adsorption capability of mordenite almost has no change after Cu0 was modified.

关 键 词：天然矿物 气态汞 温度 吸附 改性 

分 类 号：X511[环境科学与工程—环境工程]