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Catalytic dehydrogenation of propane over alkali promoted Pt/HZSM-5 is investigated. Among the catalysts tested in this work, 1%Li-Pt/HZSM-5 exhibits a much better improvement in propene selectivity. Reactionpathway on the catalyst is postulated as a synergetic effect of reversed hydrogenspillover and controlled acidity of the catalyst. Another function of Li in thesuppressing of hydrogenolysis activity by Pt is also observed.
Catalytic dehydrogenation of propane over alkali promoted Pt / HZSM-5 is investigated. Among the catalysts tested in this work, 1% Li-Pt / HZSM-5 exhibits a much better improvement in propene selectivity. Reactionpathway on the catalyst is postulated as a synergetic effect of Li hydroperoxpillover and controlled acidity of the catalyst. Another function of Li in the pressing of hydrogenolysis activity by Pt is also observed.