催化学报 ›› 2013, Vol. 34 ›› Issue (4): 798-807.DOI: 10.1016/S1872-2067(12)60557-9

• 研究论文 • 上一篇    下一篇

SAPO-35分子筛的合成及其甲醇制烯烃反应性能

李冰a, 田鹏a, 李金哲a, 陈景润a,b, 袁扬扬a,b, 苏雄a,b, 樊栋a,b, 魏迎旭a, 齐越a, 刘中民a   

  1. a 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;
    b 中国科学院大学, 北京100049
  • 收稿日期:2012-12-30 修回日期:2013-01-30 出版日期:2013-04-23 发布日期:2013-04-24
  • 通讯作者: 刘中民

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

LI Binga, TIAN Penga, LI Jinzhea, CHEN Jingruna,b, YUAN Yangyanga,b, SU Xionga,b, FAN Donga,b, WEI Yingxua, QI Yuea, LIU Zhongmina   

  1. a Dalian National Laboratory for Clean Energy, National Engineering Laboratory for Methanol-to-Olefins, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
    b University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2012-12-30 Revised:2013-01-30 Online:2013-04-23 Published:2013-04-24

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.

关键词: SAPO-35, 甲醇制烯烃, SAPO-34, 积炭物种, 失活

Abstract:

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.

Key words: SAPO-35, Methanol to olefins, SAPO-34, Coke species, Deactivation