TOLUENE AND METHYLCYCLOHEXANE ADSORPTION ON NICKEL-CATALYSTS

The chemisorption of toluene and of methylcyclohexane on nickel cataly sts at atmospheric pressure in the temperature range 365 - 485 K has b een investigated by gravimetric method as well as infrared spectroscop y. The latter indicates that toluene attached to the surface with pi-b onding is the most realistic surface compound. The coverage of organic compounds at partial pressures close to 1 kPa was found to be equal t o 0.16-0.25. The amount of adsorbed compound increased with increasing temperature, These observations led to the application of the isother m which takes into account lateral interactions, as well as the polyat omic nature of adsorption. A good description of experimental data was obtained.