Carbonized Products of Cumene Catalysed by Nickel Alumina
Corresponding Author(s) : E.M. Ezzo
Asian Journal of Chemistry,
Vol. 5 No. 4 (1993): Vol 5 Issue 4
Abstract
The 14.00% Ni–Al2O3 catalyst was prepared by the co-precipitation of mixed hydroxides from their nitrate solutions. The surface area SBET and X-ray diffraction analysis were carried out. The analysis of nitrogen adsorption data gave a value of 122.8 m2g–1 for SBET. The values of d-spacing obtained from the X-ray analysis were examined and the catalyst type was determined at 500ºC. The heterogeneous kinetics of cumene conversion was studied on a Ni–Al2O3 catalyst using a flow technique under normal pressure. The catalyst activity was measured in the temperature range 400–480ºC at space valocities ranging from 7.3 to 12.5 x 10–2 ml min–1. The gaseous products of the conversion reaction were hydrogen, methane and propene, and the liquid products were cyclohexane, cyclohexene, benzene, toluene and cymelle together with unreacted cumene. The kinetics of the gaseous products and the cyclohexane, cyclohexene, cymene and toluene revealed a zero order reaction, but that of benzene did not. The polymolecular mechanism was proposed.
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