Coal char was gasified using subcritical steam with/without a CO2 sorbent (CaO) and/or a hydrogen separation membrane (palladium-23% silver) in a batch/semibatch autoclave reactor to investigate the kinetics in terms of the effect of hydrogen separation at 590-650 °C and 1.9-2.4 MPa in order to support a hydrogen production process of the HyPr-RING method. CO2 sorption by CaO affects the production rate of H2 but scarcely affected the carbon conversion to gas. Hydrogen separation promotes the hydrogen production in spite of the absence of CO2 sorption. The effect of hydrogen separation on hydrogen yield and carbon conversion was higher than that of CO2 sorption. A higher gasification temperature increased the hydrogen yield and carbon conversion. Using a first-order reaction form in parallel, the gasification reaction mechanism was explained for the components of the volatile matter and char in coal char. A higher reaction temperature results in an increase of the values of any kinetic constant for subcritical steam gasification of Adaro coal char with/without CaO and/or a hydrogen separation membrane. CO2 sorption promoted hydrogen production due to the tar from volatiles with the catalytic effects of CaO, whereas hydrogen separation promoted hydrogen production due to char.

中文翻译：

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氢分离对基于钙的CO2吸收剂在亚临界蒸汽下进行煤焦气化的影响。

在分批/半分批高压釜反应器中，使用具有/不具有CO2吸附剂（CaO）和/或氢气分离膜（钯23％的银）的亚临界蒸汽将煤焦气化，以研究在氢气分离效果方面的动力学590-650°C和1.9-2.4 MPa，以支持HyPr-RING方法的制氢过程。CaO吸收CO2会影响H2的产生速率，但几乎不会影响碳向气体的转化。尽管没有CO 2吸附，但是氢分离促进了氢的产生。氢分离对氢产率和碳转化率的影响高于CO 2吸附。较高的气化温度提高了氢气产率和碳转化率。并行使用一阶反应形式，解释了煤焦中挥发性物质和焦炭成分的气化反应机理。较高的反应温度导致具有/不具有CaO和/或氢分离膜的Adaro煤焦的亚临界蒸汽气化的任何动力学常数的值增加。由于CaO的催化作用，CO 2的吸附促进了焦油的挥发分，而氢的分离则促进了焦炭的产生。