Abstract
Abstract A compact steam methane reforming (SMR) reactor for H 2 production from natural gas was investigated using a steady-state three-dimensional (3D) computational fluid dynamics (CFD) model with heat transfer and chemical reactions. The SMR reactor consisted of two main individual streams including combustion gas for reaction heat supply, and natural gas feed into a porous catalyst bed. The realizable k–epsilon turbulence model with enhanced wall treatment, the discrete ordinates (DO) radiation model, and the volumetric reactions in the species transport model were employed into the CFD model. A reaction kinetics model for SMR of Xu and Froment (1989) was applied to porous media as the catalyst bed. CFD model results for the temperature profile and producer gas composition were validated with experimental data. Optimum sleeve gap sizes between the burner and catalytic reaction zone for various velocities were determined, maximizing the H 2 production rate. The present CFD model showed a potential for the development of new design of the SMR reactor.
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