Abstract A non-isothermal heterogeneous steady-state model was developed for a packed bed reactor for steam methane reforming employing a multi-scale approach. The model consists of two-dimensional fluid-phase mass and heat transport equations accounting for axial and radial dispersion in the reactor tube, as well as accounting for mass and heat transfer resistances at the fluid-solid phase boundary, calculated using empirical equations. Reaction, mass and heat transfer in the catalyst particle are directly coupled with the fluid-phase equations using a 1D pellet model, thus avoiding the use of a catalyst effectiveness factor for reaction. The performance of the packed-bed reactor is compared using three pressure drop equations: the Ergun equation which neglects wall effects and the Eisfeld-Schnitzlein and Di Felice-Gibilaro correlations which include them. This multi-scale model also accounts for the effects of temperature, pressure and molar change of gas species due to reaction on superficial velocity using a separate equation. The impact of neglecting these effects through simplified models is evaluated.

中文翻译：

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用于工业蒸汽甲烷重整的多尺度二维填充床反应器模型

摘要 采用多尺度方法建立了用于蒸汽甲烷重整的填充床反应器的非等温非均相稳态模型。该模型由二维流体相传质和传热方程组成，其中考虑了反应器管中的轴向和径向扩散，以及考虑了使用经验方程计算的流固相边界处的传质和传热阻力。催化剂颗粒中的反应、传质和传热直接与使用 1D 颗粒模型的液相方程耦合，从而避免使用催化剂效率因子进行反应。使用三个压降方程比较填充床反应器的性能：忽略壁效应的 Ergun 方程以及包含它们的 Eisfeld-Schnitzlein 和 Di Felice-Gibilaro 相关性。这种多尺度模型还使用单独的方程解释了由于反应对表观速度的影响，气体种类的温度、压力和摩尔变化的影响。评估通过简化模型忽略这些影响的影响。