Abstract
A simple mechanism that models the fouling of a supported-metal-reforming catalyst accompanying the dehydrogenation of methylcyclohexane is presented and compared with published data for this system. The model of the fouling process is a Rideal-Eley type of mechanism. It correlates the data on catalytic reforming well in the region of high activity that is of greatest interest industrially. Published results from eight different fouling studies of reforming and catalytic cracking are used to obtain a more general fouling correlation between catalyst activity and reaction time and serves as an extension to the mechanistic model. The model and the empirical correlation provide a general framework for discussing some poorly understood questions including the definition and measurement of initial activity, the role of high pressure in commercial reforming, the low stability of cracking catalysts, and an explanation of the range of powers that are observed in power law rate expressions for catalyst fouling.
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