Simulation of a Reverse FlowReactor for the Catalytic Combustion of Lean Methane Emissions

doi:10.1016/j.cjche.2014.06.005

Abstract

Abstract: Thiswork is focused on the performance prediction of pilot scale catalytic reverse flow reactors used for combustion of lean methane-air mixtures. An unsteady one-dimensional heterogeneous model for the reactor was established to account for the influence of the reactor wall on the heat transfer. Results of the simulation indicate that feed concentration, switch time and compensatory temperature impose important influence on the performance of the reactor. The amount of the heat extracted from the mid-section of the reactor can be optimized via adjusting the parameters mentioned above. At the optimal operating conditions, i.e. switching time of 400 s, feed concentration of 1% (by volume), and insulation layer temperature of 343 K, the axial temperature of the reactor revealed a comparatively symmetrical "saddle" distribution, indicating a favorable operating status of the catalytic reverse flow reactor.

Key words: Methane, Catalytic combustion, Reverse flow reactor, Modeling

摘要： Thiswork is focused on the performance prediction of pilot scale catalytic reverse flow reactors used for combustion of lean methane-air mixtures. An unsteady one-dimensional heterogeneous model for the reactor was established to account for the influence of the reactor wall on the heat transfer. Results of the simulation indicate that feed concentration, switch time and compensatory temperature impose important influence on the performance of the reactor. The amount of the heat extracted from the mid-section of the reactor can be optimized via adjusting the parameters mentioned above. At the optimal operating conditions, i.e. switching time of 400 s, feed concentration of 1% (by volume), and insulation layer temperature of 343 K, the axial temperature of the reactor revealed a comparatively symmetrical "saddle" distribution, indicating a favorable operating status of the catalytic reverse flow reactor.

关键词: Methane, Catalytic combustion, Reverse flow reactor, Modeling

Jiajin Zhang, Zhigang Lei, Jianwei Li,Biaohua Chen, Jiajin Zhang, Zhigang Lei, Jianwei Li, Biaohua Chen. Simulation of a Reverse FlowReactor for the Catalytic Combustion of Lean Methane Emissions[J]. Chin.J.Chem.Eng., 2014, 22(8): 843-853.

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