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The transformation of m-xylene was investigated at 350 o C over a MWW zeolite sample. The distributions of the desorbed products and of the nondesorbed products (''coke'') were established for a large range of contact times, hence of conversions (from 4.8 to 43.7%), and for different times on stream (TOS). A rapid deactivation can be observed during the first 10 min of reaction, followed...
m-Xylene transformation was carried out at 623 K over a series of commercial HFAU zeolites with framework Si/Al ratios in the 4–100 range. Nitrogen adsorption at 77 K shows that all the samples present, besides the micro-, ultramicro- and mesopores result from the collapse of part of the micropore walls during dearamination. The acidity of the samples was characterized by pyridine adsorption followed...
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