CONVERSION OF CH3OH INTO OLEFINS OVER Al2O3-Cr2O3 TREATED WITH CF3Cl.

Article abstract of DOI:10.1246/bcsj.56.1279

A mixed oxide of Al and Cr having an atomic ratio(Al/Cr) of around 9 showed catalytic activity for the conversion of CH//3OH into olefins and aromatic compounds after treatment with CF//3Cl at 450 C. The mixed oxide treated with CF//3Cl adsorbed a considerable amount of NH//3, even at temperatures as high as 500 C. Analyses of the compositions on the surface layer by XPS showed that the F component was predominantly bound to Al, not to Cr. Strong acid sites related to the less crystallized AlF//3 seemed to be able to promote the conversion of CH//3OH.