Kinetic Model of the Dehydrogenation of Methylcyclohexane over Monometallic and Bimetallic Pt Catalysts

• DOI: 10.1021/ie100352p
• Publication Date: 2010-05-20T15:17:40Z
• Authors: Faisal Alhumaidan; David Cresswell; Arthur Garforth
• Keywords: Methylcyclohexane; Bimetallic strip

Various kinetic models were developed for methylcyclohexane (MCH) dehydrogenation over supported Pt catalysts. The best fitting mechanistic model is of the non-Langmuirian/noncompetitive Horiuti−Polanyi type. In this model, aromatic hydrogenation mechanism, which assumes an atomic hydrogen addition to aromatics on catalyst surface, applied in reverse MCH dehydrogenation. also that and molecules adsorb noncompetitively two different types sites accommodate observed near zero-order dependence reaction rate negative order upon hydrogen. To account increase inhibition effect with pressure, a non-Langmuirian adsorption isotherm adopted, nonlinear dependency between equilibrium constant system pressure. reversible irreversible deactivation kinetics are satisfactorily included model.