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.
出处
《锅炉技术》
北大核心
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)
关键词
模拟烟气
汞
钙基
吸附剂
simulated flue gas
mercury
calcium based adsorbents
adsorption
