Petroleum Processing and Petrochemicals ›› 2015, Vol. 46 ›› Issue (4): 46-50.

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SYNTHESIS AND EVALUATION OF ZSM-5 ZEOLITE CATALYST FOR MTP

  

  • Received:2014-08-15 Revised:2014-11-18 Online:2015-04-12 Published:2015-03-20
  • Contact: Jiang-Hong ZHAN E-mail:zjh_wsh@163.com

Abstract: Fine grain NaZSM-5 zeolites with wide range of Si/Al ratio were prepared by using proper amount of template, tetraethyl orthosilicate(TEOS)and water. The effect of preparation parameters on the performance of the catalysts containing ZSM-5 was studied by XRD,SEM,NH3-TPD,BET techniques and MTP test. The optimal conditions for synthesis of ZSM-5 zeolite are: n(TPA+)/n(SiO2) of 0.16-0.18,H2O/SiO2 mass ration of 14-16, Si/Al ratio of 500 and crystallization temperature of 130~150 ℃. The catalysts containing ZSM-5 were obtained by extrusion, acid exchange and calcination, and evaluated for MTP. The results indicate that the catalyst containing ZSM-5 with Si/Al ratio of 500 has a good performance of MTP. The methanol conversion is higher than 99%, and the propylene selectivity can be maintained at about 45%.