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- W2056537982 abstract "In this work three important aromatic transformations, namely: toluene disproportionation, toluene methylation and m -xylene isomerization, were investigated in a riser simulator which closely mimics the operation of commercial fluidized bed reactors. The transformations were studied over a ZSM-5 based catalyst with medium acidity of 0.23 mmol/g and a series of Y zeolites of acidities between 0.55 and 0.03 mmol/g. For pure toluene feed, it was observed that conversion over the ZSM-5 based catalyst and the weakly acidic Y zeolite (USY-1) was very low. However, with the highly acidic Y zeolite (H-Y), significant toluene conversion was observed with paring reaction more prominent than disproportionation. On the other hand, when toluene was alkylated with methanol, higher toluene conversions were achieved over both the ZSM-5 based and the weakly acidic USY-1 catalysts as compared to when pure toluene feed was used. In addition, p -xylene/ o -xylene (P/O) ratios higher than the equilibrium values were obtained in the reaction product over both catalysts. Finally, for m -xylene isomerization it was found that m -xylene conversion increased initially as the acidity of the catalyst increased up to 0.1 mmol/g beyond which any further increase in acidity resulted in a slight decrease in the m -xylene conversion." @default.
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- W2056537982 date "2008-01-01" @default.
- W2056537982 modified "2023-09-27" @default.
- W2056537982 title "Aromatic Transformation in Fluidized Bed Reactors" @default.
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- W2056537982 doi "https://doi.org/10.1135/cccc20081061" @default.
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