The role of weak Lewis acid sites for methanol thiolation

Weak Lewis acid sites combined with strong base sites of Cs + supported on WS 2 and γ-Al 2 O 3 act as active sites in the thiolation of methanol. The acid–base pairs dissociate methanol upon adsorption. The formed surface alcoholate and the corresponding sulfuryl groups enable the substitution of ox...

Full description

Saved in:
Bibliographic Details
Published inCatalysis science & technology Vol. 9; no. 2; pp. 509 - 516
Main Authors Weber-Stockbauer, Manuel, Gutiérrez, Oliver Y., Bermejo-Deval, Ricardo, Lercher, Johannes A.
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 2019
Subjects
Acids
Aluminum oxide
Chemical reactions
Dimethyl ether
Lewis acid
Methanol
Substitution reactions
Transitional aluminas
Tungsten disulfide
Vapor phases
Online AccessGet full text

Cover

More Information
Summary:Weak Lewis acid sites combined with strong base sites of Cs + supported on WS 2 and γ-Al 2 O 3 act as active sites in the thiolation of methanol. The acid–base pairs dissociate methanol upon adsorption. The formed surface alcoholate and the corresponding sulfuryl groups enable the substitution of oxygen for sulfur in a Langmuir–Hinshelwood mechanism. Stronger Lewis acid sites catalyze dimethyl ether formation via the Eley–Rideal mechanism in which methoxy groups react with gas phase methanol. The results demonstrate the importance of adjusting the acid–base strength in oxides to selectively catalyze substitution reactions.
ISSN:2044-4753
2044-4761
DOI:10.1039/C8CY02250J