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MnOx/TiO2-ZrO2催化剂的制备及低温催化还原NO的研究 被引量：5

Preparation and catalytic performance of MnO_x/TiO_2-ZrO_2 catalysts used for the selective catalytic reduction of NO at low temperature
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摘要 采用共沉淀法制备了TiO2-ZrO2复合氧化物,以其为载体采用等体积浸渍法制备了不同负载量的MnOx/TiO2-ZrO2催化剂.低温下以NH3为还原剂考察了催化剂选择性催化还原(SCR)NO的活性.借助N2吸附、XRD、热重-差示扫描量热法(TG-DSC)对催化剂进行微观表征和分析.结果表明,负载量为5%时,生成的MnO2高度分散,NO的转化率较高;负载量为10%和15%时,出现MnO2晶相,NO的转化率有所下降.120～240℃、体积空速为10000h-1的条件下,3种负载量的催化剂上NO转化率均大于90%. A series of TiO2-ZrO2 supported manganese oxide catalysts were prepared by an incipient wet impregnation method for the low temperature Selective Catalytic Reduction （SCR） of NO with NH3 as a reductanto The TiO2-ZrO2 mixed oxide support was prepared by coprecipitation. Nitrogen adsorption, XRD and TG-DSC were conducted to probe the microscopic properties of the catalysts. The results showed that MnO2 existed in a welldispersed state at 5%. Mn on TiO2-ZrO2 , but when the Mn loading was 10% and 15% , MnO2 existed in a microcrystalline phase and NO conversion decreased slightly. All catalysts yielded more than 90% NO conversion at 120 - 240℃ and 10000 h^-1.
作者 张延东 李慧远 祝社民 张利民 王志良 沈树宝
机构地区 南京工业大学材料科学与工程学院 江苏省环境科学研究院
出处 《环境科学学报》 CAS CSCD 北大核心 2009年第2期339-343,共5页 Acta Scientiae Circumstantiae
基金 国家高技术研究发展计划(863)项目(No.2006AA02Z211) 江苏省环境工程重点实验室开放课题(No.KF2008003)~~
关键词 TiO2-ZrO2复合氧化物 低温选择性催化还原 NO MNO2 TiO2-ZrO2 mixed oxide low temperature selective catalytic reduction NO MnO2
分类号 X701.2 [环境科学与工程—环境工程]
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参考文献13

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共引文献76

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引证文献5

二级引证文献35

环境科学学报
2009年 第2期

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