Cu-SAPO-34/堇青石原位制备条件中硅铝比的优化及其对NO_x催化还原性能的影响  

Optimization of different SiO_2/Al_2O_3 of in situ synthesis of Cu-SAPO-34/cordierite and its performance for catalytic reduction of NO_x

作　　者：陈影[1] 高志娟[1] 常丽萍[1] 鲍卫仁[1] 王建成[1] 

机构地区：[1]太原理工大学煤科学与技术山西省和教育部重点实验室,山西太原030024

出　　处：《化工进展》2013年第S1期174-178,共5页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(20906067);山西省高等学校优秀青年学术带头人;中国博士后面上基金(2011M500543)项目

摘　　要：在不同硅铝比条件下,采用原位水热合成技术一步制备了Cu-SAPO-34/堇青石,并通过X射线衍射(XRD)、扫描电镜(SEM)等手段对其形态结构进行了表征。同时,在模拟柴油车尾气气氛下,对催化样品的脱硝性能及抗老化性能进行了评价。研究结果表明:在催化剂制备过程中,初始凝胶中不同硅铝比的存在对CuSAPO-34的催化性能起到不同的作用,且硅铝摩尔比在0.3~0.7,整体催化剂表现出很高的脱硝活性和抗老化性能。A Cu-SAPO-34/cordierite catalyst was prepared by in situ hydrothermal synthesis with the different SiO2/Al2O3.The morphology and structure of the samples were characterized by Xray diffraction,scanning electron microscopy.And,the removal of NOx and anti-aging properties of the catalytic samples were evaluated from a simulated diesel exhaust.The results indicate that catalytic performance of Cu-SAPO-34was significantly affected by the values of SiO2/Al2O3of initial gel in the catalyst preparation process.Furthermore the catalysts prepared via SiO2/Al2O3molar ratio of 0.3—07values present excellent de-NOx activities and anti-aging properties.

关 键 词：硅铝比 Cu-SAPO-34分子筛 原位水热合成 选择性催化还原 

分 类 号：X734.2[环境科学与工程—环境工程] O643.36[理学—物理化学]