At low temperatures dimethylether mixed with hydrogen reacts over a platinum loaded H-ZSM5 catalyst selectivity to methane. Two successive steps can be distinguished; first the acid-catalyzed formation of a trimethyloxoniumion, followed by a metal-catalyzed hydrogenation to methane. Experiments with other zeolites show that the first step is rate determining; on stronger acid sites
the activation energy is lower thus the reaction is faster. Reversely the experimental determined rate of methane formation can be used to characterize the acid strenqth.
|Name||Studies in Surface Science and Catalysis|
|Conference||Catalysis by acids and bases : international symposium|
|Period||25/09/85 → 27/09/85|