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La1-xLixMnO3钙钛矿催化剂同时消除NO和碳烟催化性能
引用本文:刘晓刚,魏波,史芸菲,孙巾茹,田雨,赵玉,迟姚玲,王虹,李翠清,宋永吉. La1-xLixMnO3钙钛矿催化剂同时消除NO和碳烟催化性能[J]. 化工学报, 2020, 71(3): 1053-1059. DOI: 10.11949/0438-1157.20190849
作者姓名:刘晓刚  魏波  史芸菲  孙巾茹  田雨  赵玉  迟姚玲  王虹  李翠清  宋永吉
作者单位:1.北京石油化工学院化学工程学院,燃料清洁化及高效催化减排技术北京市重点实验室,北京 102617;2.北京工业大学 环境与能源工程学院,北京 100124;3.长岭炼化岳阳工程设计有限公司,湖南 岳阳 414000
基金项目:国家级大学生创新创业训练计划项目;燃料清洁化;北京市重点实验室项目;国家自然科学基金
摘    要:采用溶剂热法制备La1-xLixMnO3 (x=0,0.05,0.15,0.25) 钙钛矿型复合金属氧化物催化剂。通过XRD、FT-IR、XPS、H2-TPR和NO-TPD等手段对催化剂进行表征,在固定床微型反应器中评价催化剂同时消除NO和碳烟催化性能。结果表明,溶剂热法制备的La1-xLixMnO3催化剂具有单一的钙钛矿结构,催化剂中Mn物种以Mn3+和Mn4+的形式存在。Li+部分取代LaMnO3中La3+后,La1-xLixMnO3催化剂上Mn4+数量和氧空位增加,促进更多活性氧物种和氮氧化物的吸附与活化,提高氧化还原性能,改善催化活性。Li+取代量为0.15,即La0.85Li0.15MnO3催化剂催化活性较好,TmaxTig分别为463℃和327℃,NO最大转化率XNOmax为42.1%,反应温度TNOmax为383℃。

关 键 词:锰基钙钛矿  一氧化氮  碳烟  催化剂  化学反应  固定床  
收稿时间:2019-07-24
修稿时间:2019-10-18

Simultaneous removal of NO and soot over La1-xLixMnO3 perovskite catalysts
LIU Xiaogang,WEI Bo,SHI Yunfei,SUN Jinru,TIAN Yu,ZHAO Yu,CHI Yaoling,WANG Hong,LI Cuiqing,SONG Yongji. Simultaneous removal of NO and soot over La1-xLixMnO3 perovskite catalysts[J]. Journal of Chemical Industry and Engineering(China), 2020, 71(3): 1053-1059. DOI: 10.11949/0438-1157.20190849
Authors:LIU Xiaogang  WEI Bo  SHI Yunfei  SUN Jinru  TIAN Yu  ZHAO Yu  CHI Yaoling  WANG Hong  LI Cuiqing  SONG Yongji
Affiliation:1.Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology, College of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China;2.College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China;3.Yueyang Changling Refinery Engineering Co. , Ltd. , Yueyang 414000, Hunan, China
Abstract:Catalysts of La1-xLixMnO3(x=0, 0.05, 0.15, 0.25) perovskite-type complex metal oxide were prepared by solvothermal method. The catalysts were characterized by XRD, FT-IR, XPS, H2-TPR and NO-TPD. The catalytic performance of the catalysts for eliminating nitric oxide (NO) and diesel particulate matter (soot) simultaneously was evaluated in a fixed micro reactor. The results showed that La1-xLixMnO3 catalysts had single perovskite structure and Mn species existed in the form of Mn3+ and Mn4+. When La3+ is partially substituted by Li+ in LaMnO3, there were more Mn4+ and oxygen vacancies in the La1-xLixMnO3 catalysts, which can promote the adsorption and activation of oxygen species and nitrogen oxides, thus increase the redox properties and improve the catalytic activity. The La0.85Li0.15MnO3 catalyst had better performance, where the doping amount of Li+ was 0.15, the temperature of the maximum combustion rate (Tmax) and the ignition temperature (Tig) was 463℃ and 327℃, respectively, the maximum conversion of NO (XNOmax) was 42.1%, reaction temperature (TNOmax) was 383℃.
Keywords:Mn-based perovskite  NO  soot  catalyst  chemical reaction  fixed-bed  
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