Abstract
The kinetics of deactivation by coke deposition of a silica-alumina catalyst in the dehydration of 2-ethylhexanol has been studied, from experiments following temperature-time sequences in an isothermal integral reactor, in automated reaction equipment. The data analysis method has consisted of simultaneously solving the mass conservation equation for the reactant and the kinetic equation of deactivation. The validity of the kinetic model calculated, which is a separable one of the Langmuir-Hinshelwood-Hougen-Watson type, and the experimental method of data analysis has been proven by comparing the results of reactor simulation with experiments carried out under different reaction conditions. The application of this rigorous method has been compared with the application, for the same reaction system, of simplified methods conventionally used in the literature for differential or integral reactor data analysis. The results show the interest of the experimental procedure proposed and of the data analysis method, which reduce the experimentation, lead to reproducible results, and do not have the limitations determined for the simplified methods of data treatment.
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