Highly Effective Transformation of Methanol and RFCC Gas to Propylene and Paraxylene with Tungsten Hydride and Cerium Oxide Comodified HZSM-5 Zeolite
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- 作者：Shuzhen Li ; Ping Cui ; Zhenwei Wang ; Nchare Momuinou ; Luoxin Liu ; Lei Wang
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2015
- 出版时间：December 2, 2015
- 年：2015
- 卷：54
- 期：47
- 页码：11929-11936
- 全文大小：395K
- ISSN：1520-5045
文摘
HZSM-5 zeolite was comodified with tungsten hydride and cerium oxide. A fixed-bed reactor was used to investigate the performance of the resulting catalysts in the transformation of methanol and residual fluid catalytic cracking (RFCC) gas to propylene and paraxylene. The resultant samples were characterized using the XRD, SEM, and BET techniques. X-ray diffraction analysis indicated the coexistence of WHx and CeO2 in the catalysts. Only at suitable methanol/RFCC gas ratios could relatively good propylene and aromatics yields be obtained. Addition of RFCC gas to methanol inhibits dry gas production while promoting the production of propylene and paraxylene and decreases the consumption of water. The methanol conversion, the propylene yield, and the paraxylene yield reached 100%, 69.5%, and 20.0%, respectively, under suitable conditions of a silica/alumina ratio of 150, a reaction temperature of 743 K, a space velocity of 10 h鈥?, and an RFCC gas content of 9%.