Constantin Muscalu, Gheorghe Maria<br>Setting Correlated Runaway Boundaries of the Catalytic Reactor <br>for Benzene Oxidation Using a Parametric Sensitivity Analysis <br>and a Detailed Kinetic Model

Constantin Muscalu, Gheorghe Maria
Setting Correlated Runaway Boundaries of the Catalytic Reactor
for Benzene Oxidation Using a Parametric Sensitivity Analysis
and a Detailed Kinetic Model

Abstract:

The safety concerns in the operation of chemical and petrochemical plants are growing more and more nowadays. The contrary process optimization objectives involve not only economic aspects, but also safety characteristics, such stability, controllability and runaway risk, all being necessary to be considered and somehow optimized to result an optimised reactor operation, when the safety aspects must always to prevail. One example is the operation of a fixed bed catalytic reactor, when a highly exothermic reaction is conducted. The nominal operating conditions need to be set at a certain distance from the safety operating limits in order to achieve a certain control on the hot spot into the tubular reactor and to avoid excessive thermal sensitivity to random variations in the process parameters. In this paper, a precise and robust sensitivity criterion, i.e. the model-based generalized criterion of Morbidelli & Varma, is used to determine the runaway boundaries in the operating variable space for the catalytic reactor used for benzene oxidation to maleic anhydride in vapour phase using a detailed kinetic model in order to increase the results precision. The used method sets the global runaway conditions corresponding to the maximum increase of the temperature peak inside the reactor versus operating parameters. Keywords: runaway boundaries; benzene oxidation; maleic anhydride production, catalytic reactor

Issue: 2016, Volume 67, Issue 11

Pages:

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