Mathematic modeling of the process of production of nanofibrous carbon from methane in an isothermal reactor with a fixed bed of the Ni-Al"2O"3 catalyst [An article from: Chemical Engineering Journal]

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Description:
The process of synthesis of nanofibrous carbon from methane achieved in an isothermal plug flow reactor with a fixed bed of catalyst 90wt.% Ni-Al"2O"3 is considered. It is shown that the equations allow a solution in the form of a progressive wave of deactivation that moves at a constant rate and has a stationary profile. Analytic dependencies are obtained to calculate the wave rate and carbon content in the deactivated catalyst. The process parameters are calculated at 823K and specific methane consumption 120l/hg. The process parameters are compared for two types of reactors operating at identical conditions: a plug flow reactor with the fixed catalyst bed and a reactor with perfect mixing of catalyst particles and gas. The specific carbon yield is shown to be higher in the latter.