Production of ZSM-5 zeolite catalyst and its evaluation in the transalkylation process of toluene with C9 aromatics
Subject Areas :S. Shehni 1 , Mostafa Tabatabaee ghomsheh 2 *
1 - دانشجوی دکترای گروه مهندسی شیمی، واحد ماهشهر، دانشگاه آزاد اسلامی، ماهشهر، ایران.
2 - Chemical eng. Faculty, azad university
Keywords: Transalkylation, Zeolite, Hydrothermal, Reactor, Catalyst.,
Abstract :
In this study, ZSM-5 zeolite catalyst was prepared by hydrothermal method and compared with commercial catalyst. The crystal size of the prepared catalyst was smaller than that of commercial sample. Catalytic behaviour of the prepared catalyst was investigated in transalkylation reaction of toluene with C9 aromatics. The percentage of conversion to benzene and xylene increased with increasing temperature, while the selectivity decreased. Increasing WHSV led to increasing the selectivity and decreasing the conversion. According to the results obtained from catalytic activity study of the catalysts using response surface methodology (RSM), the maximum selectivity of the commercial catalyst was 65 % at 437 °C and WHSV equal to 1.3 h-1, while the maximum selectivity of the prepared catalyst was 77 % at the same conditions. This result indicated that at the aforementioned conditions the selectivity of the prepared catalyst was around 18 % more than that of commercial catalyst.
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