Flow-through reaction model of metal hydride powder for hydrogen recovery and purification from industrial by-product hydrogen to high-purity hydrogen is proposed. The hydriding mechanism of hydrogen storage alloy in the flow-through reactor is expounded. The results show that the evolution of bed temperature field leads to a unique increase in outlet hydrogen mole fraction compared to the case of pure hydrogen. In addition, the effects of operating parameters and reactor geometrical parameters are systematically investigated for performance optimization. The indexes of hydrogen absorption efficiency and effective metal hydride utilization ratio are introduced to evaluate the hydrogen recovery and purification performance of reactor. The optimum hydrogen absorption efficiency of 65 % with the effective metal hydride utilization ratio of about 0.8 could be achieved at the cooling water temperature of 373 K. This work contributes to the design and development of advanced hydrogen separation and purification technology.

中文翻译：

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基于金属氢化物粉末的工业废氢高效回收提纯高纯氢气


提出了金属氢化物粉末从工业副产氢回收提纯制取高纯氢气的流通式反应模型。阐述了储氢合金在流通式反应器中的氢化机理。结果表明，与纯氢气的情况相比，床层温度场的演变导致出口氢气摩尔分数的独特增加。此外，还系统地研究了操作参数和反应器几何参数的影响，以优化性能。引入氢气吸收效率和金属氢化物有效利用率指标来评价反应器的氢气回收和净化性能。在冷却水温度为373 K时，最佳吸氢效率为65%，有效金属氢化物利用率约为0.8。这项工作有助于先进氢分离和纯化技术的设计和开发。