Effect of Ga substitution with Al in ZSM-5 zeolite in methanethiol-to-hydrocarbon conversion.

ABSTRACT: The catalytic properties of conventional H-[Al]-ZSM-5 and gallium-substituted H-[Ga]-ZSM-5 were evaluated in the conversion of methanethiol to ethylene (CH₃SH → 1/2C₂H₄ + H₂S). Dimethyl sulfide (DMS), aromatics, and CH₄ were formed as byproducts on the H-[Al]-ZSM-5 catalyst. The introduction of Ga into the ZSM-5 structure provided a high ethylene yield with relatively high selectivity for olefins. Based on the temperature-programmed desorption of NH₃ and pyridine adsorption on zeolites, the strength of acid sites was decreased by introducing Ga into the ZSM-5 structure. Undesirable reactions seemed less likely to occur at weakly acidic sites. The suppression of the formation of dimethyl sulfide (CH₃SH → 1/2C₂

SUBMITTER: Watanabe R 

PROVIDER: S-EPMC10352641 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature