The hydrogen removal and carbon formation effects in dense palladium (Pd)-based membrane reactors for dry reforming of methane (DRM) performance is numerically analyzed in this study. The steady-state membrane reactor operation is described using a three-dimensional, heterogeneous, non-isothermal mathematical model. Based on the numerical simulation results for reaction temperature and pressure varied in the 400–600 °C and 1–30 atm ranges, methane conversion and hydrogen yield were found enhanced using the membrane reactor. However, carbon formation, which affects catalyst activity and limits the benefits of using a membrane reactor is also enhanced. A parametric study using reaction pressure as the primary parameter for the membrane reactor operation found that the CH 4 conversion, hydrogen yield, H 2 recovery, and carbon formation can be enhanced by increasing the reaction temperature, inlet CO 2 /CH 4 ratio, and sweep gas flow rate. With the enhanced H 2 removal, carbon formation is also enhanced. Because membrane permeance is inversely proportional to the membrane thickness, membrane thickness can be used as a parameter to control the carbon formation under given operating conditions.

中文翻译：

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使用膜反应器在低温下进行甲烷干法重整以生产氢气的模型

在这项研究中，数值分析了用于干法重整甲烷（DRM）性能的致密钯（Pd）基膜反应器中的氢去除和碳形成效应。使用三维，非均质，非等温数学模型描述稳态膜反应器的运行。根据反应温度和压力在400–600°C和1–30 atm范围内变化的数值模拟结果，发现使用膜反应器可提高甲烷转化率和氢产率。但是，也会增加碳的形成，这会影响催化剂的活性并限制使用膜反应器的益处。使用反应压力作为膜反应器操作的主要参数进行的参数研究发现，CH 4转化率，氢产率，H 2回收率，通过增加反应温度，入口CO 2 / CH 4比和吹扫气体流速可以提高碳的形成。随着增强的H 2去除，碳的形成也得到增强。因为膜的渗透率与膜的厚度成反比，所以在给定的操作条件下，膜的厚度可以用作控制碳形成的参数。