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The effect of steam dilution on the formation of coke and minor products in 2-methylpenatne crackingon ultra stable HY at 673 K has been studied.The results show that steam dilution suppresses the formation of cokeand minor aromatic products,but enhances the H/C atomic ratio of coke and the production of di-olefins.This andother evidences suggest that steam dilution enhances the desorption of coke precursors,diolefinic ions and cyclicions,by inhibiting the further pathological reactions to produce aromatics and polyaromatics.These insights intothe chemistry underlying coke formation in hydrocarbon cracking on solid acid catalysts can potentially be appliedto the development of additives which inhibit coke formation and control catalyst deactivation.
The effect of steam dilution on the formation of coke and minor products in 2-methylpenatne cracking on ultra stable HY at 673 K has been studied. The results show that steam dilution suppresses the formation of coke and minor aromatic products, but enhances the H / C atomic ratio of coke and the production of di-olefins.This andother evidences suggest that steam dilution enhances the desorption of coke precursors, diolefinic ions and cyclicions, by inhibiting the further pathological reactions to produce aromatics and polyaromatics. insights intothe chemistry underlying coke formation in hydrocarbon cracking on solid acid catalysts can potentially applied to the development of additives which inhibit coke formation and control catalyst deactivation.