Abstract—

A model is proposed for steam reforming of methane in a catalytic reactor, the working section of which includes two cylindrical chambers separated by a palladium foil membrane of the Pd, Pd–23% Ag, Pd–6% Ru, Pd–10% Ru, Pd–6% In–0.5% Ru, and Pd–6% In compositions. The upper chamber is evacuated and the atmospheric pressure is maintained in the lower chamber. Upon uniform feed of raw materials to the lower chamber, the problems are reduced to determination of the CH₄, H₂O, CO₂, CO, and H₂ flows from the solution of a system of first-order nonlinear ordinary differential equations. The 100% conversion of methane is achieved only when the ratio of water steam and methane input flows is more than two. Calculations are performed in the temperature range 700 \( < T < \) 1000 K at the ratio of steam/methane input flows belonging to this range [2, 10]. The optimum values of input flows of raw materials, at which the yield of hydrogen and the conversion of methane reach 100%, are determined. At optimum flows and specified temperature, the maximum hydrogen flow through the membrane is observed at the minimum permissible ratios of steam and methane input flows.

中文翻译：

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镍催化剂和钯合金箔氢过滤膜模块中甲烷蒸汽重整的优化

摘要-

提出了一种用于催化反应器中甲烷蒸汽重整的模型，其工作部分包括两个圆柱形腔室，由 Pd、Pd–23% Ag、Pd–6% Ru、Pd–10% Ru 的钯箔膜隔开、Pd–6% In–0.5% Ru 和 Pd–6% In 成分。上腔室被抽空，下腔室中保持大气压力。将原料均匀地送入下室后，问题就减少到测定 CH ₄、H ₂ O、CO ₂、CO 和 H ₂来自一阶非线性常微分方程组的解。只有当水蒸汽和甲烷输入流量之比大于二时，才能实现甲烷的100%转化。计算在温度范围 700 \( < T < \) 1000 K 内以蒸汽/甲烷输入流量的比率属于该范围 [2, 10]。确定了氢气收率和甲烷转化率达到100%的原料输入流量的最佳值。在最佳流量和指定温度下，通过膜的最大氢气流量是在蒸汽和甲烷输入流量的最小允许比率下观察到的。