Methanol Usage in Toluene Methylation over Pt Modified ZSM-5 Catalyst: Effects of Total Pressure and Carrier Gas
发表时间：2019-03-12
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- 论文类型：
- 期刊论文
- 第一作者：
- Wang, Yiren
- 合写作者：
- Liu, Min,Zhang, Anfeng,Zuo, Yi,Ding, Fanshu,Chang, Yang,Song, Chunshan,Guo, Xinwen
- 发表时间：
- 2017-04-26
- 发表刊物：
- INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
- 收录刊物：
- SCIE、EI、Scopus
- 文献类型：
- J
- 卷号：
- 56
- 期号：
- 16
- 页面范围：
- 4709-4717
- ISSN号：
- 0888-5885
- 摘要：
- The present study investigates the effects of total pressure and carrier gas on toluene methylation using two modified ZSM-5 based catalysts impregnated with or without platinum. Toluene alkylation with methanol was carried out not only at different reaction pressure under nitrogen or hydrogen but also at different total pressure while the partial pressure of reactants remained constant. The amount of coke formed on the catalysts was less under hydrogen atmosphere. However, the hydrogenation reaction catalyzed by Pt modified catalyst promoted methanol conversion to undesired methane and light hydrocarbons, which in turn decreased the toluene conversion. For both carrier gases, it was found that methanol usage toward undesired by products increased with total pressure. Such a trend suggests that a higher total pressure results in a lower toluene and methanol adsorption complexes formation rate in the ZSM-5 pores, and therefore the toluene hydrogenation reaction and the higher total pressure simultaneously increased the selectivity of methanol converted to light hydrocarbons and methane, which led to the deteriorated catalytic performance of Pt modified catalysts at elevated reaction pressure. conversion decreased. The
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