1971 Volume 4 Issue 3 Pages 274-280
Multiple steady states of a catalytic reaction were studied experimentally in the hydrogenation of ethylene on a single pellet of Adkins catalyst, obtaining apparent kinetic expression of the reaction. Mechanism of the formation of sigmoida! shape of heaf generation curve was investigated. This has been attributed to the mass and heat transfer resistances across the film as well as in the particle. However the present experiments have shown that the change of apparent activation energy due to adsorption term should be emphasized more in explaining the heat generation curves.
The effect of initial condition on steady state activity is also discussed. It was found that this bistability could be attributed to thermal instability combined with concentration stability resulting from the Langmuir-Hinshelwood mechanism.