堇青石改性V_2O_5-WO_3/TiO_2催化剂性能影响研究  

Effects of cordierite on V_2O_5-WO_3/TiO_2 catalytic performance

作　　者：刘清才[1] 席文昌[1,2] 杨剑[1] 贺媛媛[1] 黄锐 洪燕 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044 [2]重庆远达催化剂制造有限公司,重庆401336 [3]中电投远达环保工程有限公司,重庆401122

出　　处：《功能材料》2013年第11期1624-1628,共5页Journal of Functional Materials

基　　金：国家高技术研究发展计划(863计划)资助项目(2010AA065001);科技人员服务企业行动资助项目(2009GJF10047);重庆市科技攻关资助项目(CSTC.2010AB7132)

摘　　要：采用固液混合方法,利用改性堇青石制备蜂窝式V2O5-WO3/Cordierite-TiO2脱硝催化剂,通过扫描电子显微镜(SEM)、热分析(DSC-TG)、X射线衍射分析仪(XRD)、模拟烟气分析装置和磨损装置,考察其表面形貌、热稳定性、晶相变化、耐磨损性能和催化剂活性。结果表明,改性堇青石的引入,制备的催化剂具有表面微气孔多和热稳定性好的特点,700℃煅烧后,V2O5和WO3的仍呈现无定形态或微晶状态;引入10%的堇青石制备的催化剂磨损率低,尤其在250～460℃反应时,脱硝率可以保持在80%以上。The V2O5-WO3/cordierite-TiO2 honeycomb catalysts were prepared by solid-liquid mixing method,with cordierite modified.Surface morphology,thermal stability crystal structure,abrasion resistance and activity were studied by SEM,XRD,BET,abration equipment and simulated flue gas analyzer,respectively.The results indicated that the cordierite modified was introduced,V2O5-WO3/cordierite-TiO2 honeycomb catalyst was a large number of micro pores in its surface（which promote the reaction）,good thermal stability.The phase of V2O5 and WO3 was amorphous or nanocrystalline state after it was calcined at 700℃.Abration ratio of V2O5-WO3/10% cordierite-TiO2 was law.Especially in the 250-460℃ reaction,the denitration rate can be maintained above 80%.

关 键 词：V2O5-WO3 TIO2 堇青石 烟气脱硝 氮氧化物 选择性催化还原 

分 类 号：X511[环境科学与工程—环境工程]