SAPO-35分子筛的合成及其甲醇制烯烃反应性能  

Synthesis of SAPO-35 molecular sieve and its catalytic properties in the methanol-to-olefins reaction

作　　者：李冰[1] 田鹏[1] 李金哲[1] 陈景润[1,2] 袁扬扬 苏雄[1,2] 樊栋 魏迎旭[1] 齐越 刘中民[1] 

机构地区：[1]中国科学院大连化学物理研究所洁净能源国家实验室(筹) 甲醇制烯烃国家工程实验室,辽宁大连116023 [2]中国科学院大学,北京100049

出　　处：《催化学报》2013年第4期798-807,共10页

摘　　要：以六亚甲基亚胺为模板剂,采用水热法合成了不同硅含量的磷酸硅铝分子筛SAPO-35,并利用X射线衍射、X射线荧光光谱、扫描电镜、固体核磁、X射线光电子能谱和N2吸附-脱附等方法对样品进行了表征.研究了不同硅含量的SAPO-35分子筛在甲醇转化制烯烃反应中的催化行为,同时对比分析了具有相近硅含量的SAPO-35和SAPO-34分子筛在甲醇转化反应过程中积炭物种随反应时间的演变特征,尝试将分子筛结构和其积炭失活行为进行了关联.SAPO-35 molecular sieve samples with different Si contents were hydrothermally synthesized using hexamethyleneimine as the template and characterized by XRD, XRF, SEM, MAS NMR, XPS and N2 physisorption. Three SAPO-35 samples were tested as methanol-to-olefins catalysts. After the reaction, the evolution of coke species was investigated over SAPO-35 and SAPO-34 catalysts with similar Si concentrations. A correlation between the cage size of the molecular sieves and the coke species was obtained.

关 键 词：SAPO-35 甲醇制烯烃 SAPO-34 积炭物种 失活 

分 类 号：O643.36[理学—物理化学]