TY - JOUR
T1 - Methanol Usage in Toluene Methylation over Pt Modified ZSM-5 Catalyst
T2 - Effects of Total Pressure and Carrier Gas
AU - Wang, Yiren
AU - Liu, Min
AU - Zhang, Anfeng
AU - Zuo, Yi
AU - Ding, Fanshu
AU - Chang, Yang
AU - Song, Chunshan
AU - Guo, Xinwen
N1 - Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/4/26
Y1 - 2017/4/26
N2 - 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 byproducts 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 conversion decreased. The 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. (Graph Presented).
AB - 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 byproducts 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 conversion decreased. The 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. (Graph Presented).
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U2 - 10.1021/acs.iecr.7b00318
DO - 10.1021/acs.iecr.7b00318
M3 - Article
AN - SCOPUS:85020430842
SN - 0888-5885
VL - 56
SP - 4709
EP - 4717
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 16
ER -