Isopentane Dehydrogenation with Chromia-Alumina Catalyst

Abstract

Summary:Dehydrogenation of isopentane over chromia-alumina catalyst of several sizes coke was observed in a fixed-bed reactor. The coke distribution in a catalyst pellet was found to be uniform. The diffusivity of the reactants within the catalyst pellet was measured and found to be a linear function of the coke content. A kinetic model was proposed and kinetic parameters were estimated by computer simulation under the condition that intraparticle diffusion was negligible. Using this kinetic model and the function of diffusivity, the effect of intraparticle diffusion on conversion and the profile of the coke content in the reactor were experimentally described.

Research on chemical reaction engineering for petroleum processing.

“…9, the rate is inversely proportional to the square of pellet diameter, which confirms pore diffusion control . From these results, the burning rate of coke, that is, the rate of regeneration, is represented by (4)(5)(6)(7)(8)(9)(10)(11) concentration of carbon in a particle, and Co2 is oxygen concentration in the gaseous phase. Since the dehydrogenation of n-butane, deactivation rate of catalyst, and regeneration rate were clarified, let us here consider the optimum operating conditions for this dehydrogenation process.…”