Abstract
Transient response data for the cyclohexane dehydrogenation reaction were collected on a surface coated Pt-Al2O3 catalyst. Mathematical analysis with the surface coated catalyst is considerably simpler due to the absence of intraparticle gradients. The data, which often displayed a characteristic overshoot type of response, were correlated by a surface coverage model where the π/σa-bonded benzene transition surface complex can reversibly orient itself to a σ-bonded hydrogen deficient surface species which cannot desorb. As in previous work cyclohexane adsorption was found to be slow and surface reactions involving the adsorbed hydrocarbon species were found to be rapid.
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