改性整体式活性炭净化NO  

Modified monolithic activated carbon for purifying nitrogen oxide

作　　者：张豪杰[1] 姚炜[1] 刘洋[1] 周洁[1] 何丹农[1] 

机构地区：[1]纳米技术及应用国家工程研究中心,上海200241

出　　处：《环境工程学报》2012年第10期3703-3707,共5页Chinese Journal of Environmental Engineering

基　　金：上海市科委社发重点项目(10231201800);上海市科技创新行动计划(10DZ2293800)

摘　　要：通过KOH改性整体式无烟煤活性炭,制备了NO吸附净化材料。利用SEM、EDS和N2吸附-脱附对活性炭表面形貌特性、元素组成、比表面积及孔径分布等进行表征,并分别考察了KOH溶液浓度、干燥温度、反应空速、反应温度等因素对活性炭净化NO性能的影响。结果表明,活性炭的微孔结构对NO的吸附起主要作用,NO的净化效率随空速的增加而降低,随反应温度升高先升高后降低。经20%KOH溶液改性,30℃干燥的活性炭材料具有较丰富的微孔结构和孔容,在30℃和空速15 000 h-1的反应条件下,材料对NO的净化效率可达到73%左右。A highly efficient NO adsorption-purification material was prepared by using monolithic activated carbon pre-treated with KOH.The morphology,chemical composition,specific surface area and pore size distribution of the activated carbons were characterized by scanning electron microscopy,energy disperse spectroscopy and N2 adsorption-desorption isotherms.The effects of KOH concentration,drying temperature,space velocity,reaction temperature on NO purification efficiency were investigated and discussed.The results showed that micropores in the KOH treated activated carbon played a dominant role in the NO removal.The purification efficiency decreased with the increase of space velocity;while during the rise of reaction temperature,it first increased and then decreased in the following stage.The activated carbon treated with 20% KOH solution possessed a high microporosity and pore volume,which showed a high NO purification efficiency of about 73% at 30℃and a space velocity of 15 000 h-1.

关 键 词：整体式活性碳 KOH改性 NO净化 

分 类 号：X703[环境科学与工程—环境工程]