The effect of Y-zeolite acidity on m-xylene transformation reactions

It was found that the high acidity of H-Y-zeolite increases paring reaction, in addition to the well-known isomerization and disproportionation pathways. A significant drop in trimethyl-benzenes (TMBs) yields and a rise in benzene, gases and coke yields were observed with both reaction temperature and catalyst acidity. The p-xylene/o-xylene (P/O) ratio was found to be independent of zeolite acidity.