锰氧化物改性活性炭去除空气中甲醛  

MnO_x/GAC for removal of formaldehyde in air

作　　者：周昕彦 张芃[1] 蒋文[1] 杨易韬 林莉莉[1] 张巍[1] 

机构地区：[1]华东理工大学资源与环境工程学院国家环境保护化工过程环境风险评价与控制重点实验室,上海200237

出　　处：《环境工程学报》2015年第12期5965-5972,共8页Chinese Journal of Environmental Engineering

基　　金：大学生创新创业训练计划(201310251065);国家自然科学基金资助项目(41201302)

摘　　要：为了提高活性炭材料对于气相甲醛的处理性能,采用浸渍法制得了负载锰氧化物的颗粒活性炭(Mn O_x/GAC)。通过静态去除实验,比较了不同制备条件及环境因素对Mn O_x/GAC去除甲醛性能的影响。结果表明,在负载锰氧化物后,Mn O_x/GAC对甲醛的去除性能有明显提高。在实验考察范围内,当锰氧化物含量为0.98%,焙烧温度为380℃时,Mn O_x/GAC对于甲醛的去除性能最佳,单位处理量较未负载时提高了1倍。具备较多大孔结构的果壳炭较椰壳炭更适合作为Mn O_x/GAC的载体。Mn O_x/GAC对气相甲醛具有持续的去除能力,锰氧化物对富集在活性炭孔内的甲醛起到了催化降解作用。室内低温低湿的处理环境有利于Mn O_x/GAC对甲醛的去除。MnOx/GAC samples were synthesized through impregnating manganese oxide on granular activated carbon to improve its removal capacity for formaldehyde in the air. Series of batch experiments were conducted to investigate the effects of preparation condition and environmental factors on the removal capacity of MnOx/GAC for formaldehyde. The result showed that the removal ability of MnOx/GAC for formaldehyde was improved significantly compared to the GAC carrier. MnOx/GAC with 0. 98% MnOx,calcined under 380℃,has the best removal capacity which increased by nearly twice of its GAC carrier. Fruit shell based GAC is a better carrier than coconut shell based GAC due to its larger average pore size. MnOx/GAC has sustainable formaldehyde removal ability,because the manganese oxide can catalytically degrade the formaldehyde adsorbed on MnOx/GAC surface. Certain environment factors,such as lower temperature and humidity,would improve the removal process.

关 键 词：甲醛 活性炭 锰氧化物 改性 吸附 催化 

分 类 号：X701[环境科学与工程—环境工程]