摘要
利用浸渍法制备了Ag/ZSM-5催化剂,并通过XRD、NH_3-TPD和NO-TPD等手段对Ag/ZSM-5催化剂进行表征,考察了焙烧气氛、焙烧温度对催化剂催化性能的影响。结果表明,焙烧气氛影响Ag/ZSM-5催化剂上Ag物种的形态、催化剂酸量和对NO的吸脱附性能;焙烧温度影响催化剂的酸性、酸量,也影响催化剂对NO的吸脱附性能;氮气气氛、800℃焙烧的催化剂CH_4-SCR脱硝活性较好,350℃时NO转化率达到最大,为42%。
Ag/ZSM-5 catalysts are prepared by wet impregnation method and characterized through X-ray diffraction （XRD）, NH3 temperature-programmed desorption （NHa-TPD） and NO temperature-programmed desorption （NO-TPD）. The effects of calcining atmosphere and calcining temperature on the performance of the prepared catalysts are also studied.The experimental results show that the calcining atmosphere has significant impacts on the forms of Ag species in catalysts, acidic amount of catalysts and NO adsorption/desorption performance over Ag,/ZSM-5. The calcining temperature also affects the acidic property and acidic amount of catalysts. The catalyst calcined at 800℃ in nitrogen atmosphere exhibits better activity in NO removal via CH4-SCR. The catalyst calcined at 350℃ can bring about the biggest NO conversion of 42%.
作者
魏波
张相俊
李思漩
迟姚玲
王虹
李翠清
宋永吉
WEI Bo;ZHANG Xiang-jun;LI Si-xuan;CHI Yao-ling;WANG Hong;LI Cui-qing;SONG Yong-ji(College of Chemical Engineering,Beijing University of Chemical Technology,Beijing 100029,China;Beijing Municipal Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology,School of Chemical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China;Sinopec Jinan Company,Jinan 250101,China)
出处
《现代化工》
CAS
CSCD
北大核心
2018年第7期103-106,108,共5页
Modern Chemical Industry
基金
国家自然科学基金资助项目(2167329
U1662103)
燃料清洁化及高效催化减排技术北京市重点实验室资助项目(BZ041420180007)
重质油国家重点实验室开放基金资助项目(SKLHOP201501)
