Chinese Journal of Catalysis ›› 2013, Vol. 34 ›› Issue (4): 798-807.DOI: 10.1016/S1872-2067(12)60557-9

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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

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