钙基吸附剂固定床吸附烟气中Hg^0的试验研究  

Simulation of Mercury Emission Control by Calcium-based Sorbent Under Fixed-bed Operations

作　　者：黄治军[1] 段钰锋[2] 王运军[2] 孟素丽[2] 焦永刚[2] 

机构地区：[1]江苏方天电力技术有限公司,江苏南京211102 [2]东南大学能源与环境学院,江苏南京210096

出　　处：《锅炉技术》2011年第5期65-69,共5页Boiler Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2006CB200300)

摘　　要：在小型模拟燃煤烟气Hg吸附和形态转化试验台上研究了几种钙基吸附剂对模拟烟气中Hg的脱除效果。结果表明:Ca(OH2)对单质汞的吸附主要是物理吸附;CaO对单质汞的吸附则是物理吸附和化学吸附共同作用的结果;SO2和HCl可以通过与钙基吸附剂发生反应提供活性位或者将Hg0氧化成Hg2+来促进对汞的吸附,HCl对汞的促进作用更强;加入高锰酸钾浸渍煅烧改性后,由于化学吸附的发生,钙基类物质的吸附能力有所提高。A beach-scale experimental set-up was constructed,on which the experiments was conducted to study the ability of several calcium based adsorbents on removing mercury from simulated flue gas.The conclusions are as follows： the adsorption of Ca（OH）2 was mainly controlled by physical mechanisms,therefore,both physisorption and chemiadsorption mechanism existing in CaO situation;SO2 and HCl can promote the adsorption ability of calcium based adsorbents by oxidizing Hg0 to Hg2＋ or providing active sites through react with calcium based adsorbents,and the promotion of HCl is stronger than SO2;when impregnated with KMnO4,the adsorption can be enhanced obviously because of the presence of chemiadsorption.

关 键 词：模拟烟气 汞 钙基 吸附剂 

分 类 号：TQ534.9[化学工程—煤化学工程]