Liquid-Phase Dehydration of 1-Phenylethanol over HZSM-5: Kinetic Modeling

NICOLÁS M. BERTERO; CARLOS R. APESTEGUÍA; ALBERTO J. MARCHI

CATALYSIS COMMUNICATIONS

Elsevier

Año: 2009 vol. 10 p. 1339 - 1344

1566-7367

The liquid-phase dehydration of 1-phenylethanol over HZSM-5 zeolite (Si/Al=20), at 353-373 K and using cyclohexane as solvent, was studied. Varying initial reactant concentration, anegative order respect to 1-phenylethanol was determined. In all cases, HZSM-5 resultedhighly selective to styrene. Experimental data were fitted using LHHW-like kinetic models.Both physical and statistical criteria were applied to discriminate the best heterogeneouskinetic model. The most satisfactory fitting was obtained assuming that styrene is formedfrom 1-phenylethanol interacting simultaneously with two active sites. This mechanismexplains the negative order respect to 1-phenylethanol.