A LUMPED KINETIC-MODEL FOR DEHYDRATION OF ETHANOL TO HYDROCARBONS OVER HZSM-5

A kinetic model for the conversion of ethanol to hydrocarbons over HZSM-5 catalyst has been developed. The model is based on data from ethanol dehydration experiments conducted in a fixed-bed integral reactor at atmospheric pressure and temperatures of 150°C to 360°C, and is the first which integrates the major reaction pathways of both dehydration and higher hydrocarbon formation over ZSM-5 zeolite. In the model C3-Q olefins, C3-C5 paraffins, and C£ hydrocarbons are treated as lumped species, while ethanol, diethyl ether, ethylene, and ethane are treated individually. Nonlinear parameter estimation using quasilinearization and least squares as the objective function has been implemented to estimate rate constants, adsorption equilibrium constants, and activation energies. The Lanemuir-Hinshelwood rate expressions successfully correlated the experimental data. © 1990, Taylor & Francis Group, LLC. All rights reserved.