Abstract

Synthesis gas is the cornerstone of many chemical processes for manufacturing a broad range of petrochemical products. In this work, a mathematical model was developed for investigation of the CO₂ reforming of methane in a catalytic packed bed reactor. To simulate the reformer, a pseudo homogenous two-dimensional mathematical model was developed and the resulting nonlinear second order partial differential equations were solved using the finite difference method. It was assumed that equilibrium reverse water-gas shift reaction always takes place in the reactor to adjust H₂/CO ratio (≤1). The effect of operating conditions, including bulk density, porosity, inlet gas and wall temperature, reactor diameter, total molar flow of gas and inlet CH₄/CO₂ ratio on the reactor performance were investigated. Finally, the study investigated the effect of H₂/CO ratio on the outlet synthesis gas product at the range of 0.7–1. The validity of the model was investigated and the deviation between the model results and the experimental data was acceptable.

中文翻译：

---

逆水煤气变换反应甲烷 CO2 重整的数学模型

摘要

合成气是制造各种石化产品的许多化学工艺的基石。在这项工作中，开发了一个数学模型来研究催化填充床反应器中甲烷的CO _2重整。为了模拟重整器，开发了伪齐次二维数学模型，并使用有限差分法求解所得非线性二阶偏微分方程。假设反应器中总是发生平衡逆水煤气变换反应来调节H ₂ /CO比(≤1)。操作条件的影响，包括堆积密度、孔隙率、入口气体和壁温、反应器直径、气体总摩尔流量和入口CH ₄ /CO ₂研究了比率对反应器性能的影响。最后，研究了H ₂ /CO比在0.7-1范围内对出口合成气产物的影响。考察了模型的有效性，模型结果与实验数据的偏差在可接受的范围内。