活性炭孔隙结构对催化氧化脱除单质汞的影响  

Role of activated carbon structures in catalytic oxidation adsorption for mercury

作　　者：张郃[1,2] 赵建涛[2] 房倚天[2] 王洋[2] 

机构地区：[1]太原工业学院,山西太原030008 [2]中国科学院山西煤炭化学研究所,山西太原030001

出　　处：《燃料化学学报》2015年第3期360-366,共7页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(20706055);山西省高等学校科技创新项目(2013161)

摘　　要：研究活性炭在硫化氢存在条件下催化氧化脱除煤气中单质汞的吸附机理和探讨提高其吸附能力的方法,在模拟煤气气氛下对3种活性炭和一种活性焦进行汞的吸附性能实验,并进一步分析活性炭(焦)的孔隙结构。用BET方程处理N2等温吸附数据,计算比表面积;用HK法进行微孔分析;用BJH法计算中孔孔径分布。结果表明,硫化氢被催化氧化后,生成吸附在活性炭孔壁上的活性硫促进了对汞的吸附;随着活性炭微孔和中孔体积的增大,活性炭对汞的吸附能力得到提高。The Hg^0 catalytic oxidation and adsorption capabilities of 3 activated carbons（ACs） and one active coke were evaluated in a simulated coal-derived atmosphere containing hydrogen sulfide（H_2S） and oxygen（O_2）.The examined adsorbent properties that may affect adsorption capacity are pore structure and the presence of sulfur on surface of ACs.N_2 isothermal absorption data was treated by BET equation and to calculate the special surface area.The absorption data was settled by HK method to obtain the micro porous structure.The medium pore diameter distribution was calculated by BJH method.The results reveal that with the increasing of micro pore and medium pore volume,Hg adsorptive capacity of activated carbons is enhanced.In all cases,Hg removal efficiency increases with sulfur addition.

关 键 词：煤气 活性炭 脱汞 孔隙结构 

分 类 号：X701.3[环境科学与工程—环境工程]