Abstract
Methanethiol was completely decomposed to form hydrocarbons and hydrogen sulfide (H2S)during the MTG (Methanol To Gasoline) reaction on H-ZSM-5 under pressurized conditions. Sulfur-containing compounds in the feed suppressed the gas formation and promoted the C4+ aliphatics while keeping the aromatics formation constant.Although the pulse treatment of the H-ZSM-5 with H2 showed no effect on the products distribution under atmospheric conditions, the low concentration of hydrogen sulfide (105ppm)in the feed promoted the olefin contents in lower hydrocarbons while keeping the selectivities of C-C3 hydrocarbons, C4+ aliphatics, and aromatics unchanged. Hydrogen sulfide was assumed to suppress the transfer hydrogenation of olefins by surface hydrogen which was produced during the aromatization of olefins.
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