m -Cresol methylation: Role of internal and external acid sites in the product distribution

The effect of the porous structure and the role of internal and external acid sites in product distribution in gas-phase alkylation of m-cresol with methanol were studied on zeolites HBEA, HZSM5 and HMCM22. Catalysts were characterized by N2 physisorption and FTIR of adsorbed pyridine. Trimethylated product formation was inhibited in narrower pore size zeolites (HMCM22 and HZSM5) and a preferential selectivity to smallest dimethylphenol isomer (2,5-dimethylphenol) was observed. The selectivity to 2,5-dimethylphenol on HMCM22 reached a value of 82% after suppressing the acid sites of the external cavities and pore mouth using 2,4-dimethylquinoline, which is a basic molecule too bulky to diffuse through the narrow pores of these zeolites.

Palabras clave: M-Cresol Alkylation , Shape Selectivity , Zeolites

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Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)

Identificadores

URI: http://hdl.handle.net/11336/40711

DOI: http://dx.doi.org/10.1016/j.catcom.2016.12.025

URL: https://www.sciencedirect.com/science/article/pii/S1566736716304782?via%3Dihub

Colecciones

Articulos(CCT - NORDESTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - NORDESTE

Articulos(INCAPE)
Articulos de INST.DE INVEST.EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"

Citación

Acevedo, Mauro Dino; Montañez Valencia, Mardelly Kateryne; Okulik, Nora Beatriz; Sad, Maria Eugenia; Padro, Cristina; m -Cresol methylation: Role of internal and external acid sites in the product distribution; Elsevier Science; Catalysis Communications; 92; 3-2017; 10-14

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