INCAPE 05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
artículos
Título:
Study of gas phase m-cresol alkylation with methanol on solid acid catalysts
Autor/es:
MAURO D. ACEVEDO; GABRIEL BEDOGNI; NORA B. OKULIK; CRISTINA L. PADRÓ
Revista:
CATALYSIS LETTERS
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2014 vol. 144 p. 1946 - 1954
ISSN:
1011-372X
Resumen:
The gas-phase alkylation of m-cresol with methanol was studied at 523 K on Al-MCM-41 and zeolites ZnY, HBEA, HZSM5 and HMCM22. The acidity was determined by ammonia TPD and FTIR of adsorbed pyridine.On acid sites of moderate strength (Al-MCM-41), initially the O-alkylation rate was higher than the C-alkylation rate. In contrast, formation of dimethylphenols by C-alkylation was highly favored on ZnY and HMCM22 which have both strong acidity although different nature; Lewis (ZnY) and Brønsted and Lewis (HMCM22). High selectivity of 2,5-DMP was observed on HZSM5, probably due to diffusional constraint. All catalysts, except Al-MCM-41, showed deactivation by coke formation.
