Collect. Czech. Chem. Commun. 1985, 50, 1784-1800

Kinetics of dehydration of 1-butanol over zeolites

O. Olaofea and P. L. Yueb

a Department of Food Technology, Federal Polytechnic, Ado-Ekiti, Nigeria
b School of Chemical Engineering, Bath University, Great Britain


The kinetics of catalytic dehydration of 1-butanol have been studied on three commercial types of zeolites varied in cage structures, pore sizes, and acidity at 200 - 300 °C. The dehydration reactions were performed in a continuous stirred gas-solid reactor. Butenes and dibutyl ether were the principal products. Both simple power-law and Hougen-Watson types of rate expressions have been used to model the dehydration reactions kinetics. The former satisfactorily correlates the kinetic data procured over all the zeolites except in the case of dibutyl ether formation over ZNa. The Hougen-Watson type of rate expression adequately fitted the rate of formation of both products. The reaction orders with respect to 1-butanol were approximately equal to zero. The kinetic and adsorption parameters were evaluated and satisfactorily correlated as functions of reaction temperature. Activation energies for the formation of dibutyl ether over zeolites ZNa and 4A are affected by pore diffusion.