An integrated high purity hydrogen generation process, short-cut chemical looping hydrogen generation, was proposed in this study. Iron dust of the steel industry, as the feedstock of iron-based material, was employed as the oxygen carrier. This study used second-metallurgy-reduced iron and analytical-reduced iron to validate the feasibility of oxidation performance with air and steam at different reaction temperatures. To obtain the fundamental data, thermogravimetric analyzer and packed-bed reactor had been used. Due to the difference in carbon composition and trace metal in the second-metallurgy-reduced iron, the reaction behaved completely different under different experiment conditions, especially at different converting temperatures. According to the apparent solid conversion and outlet gas concentration profiles, the oxidized reaction with air and steam would be divided into two stages, kinetically controlled regime and product diffusion regime. Besides, the purity of hydrogen produced by second-metallurgy-reduced iron and analytical-reduced iron could reach 99.2% and 99.9%, respectively. Overall, compared to analytical-reduced iron, using second-metallurgy-reduced iron provides a link between the waste recycling in steel industry to generate hydrogen with chemical looping concepts in the industrial level.

在这项研究中提出了一个集成的高纯度制氢过程，即短程化学循环制氢。钢铁行业的铁粉作为铁基材料的原料被用作氧气载体。本研究使用第二冶金还原铁和分析还原铁来验证在不同反应温度下用空气和蒸汽进行氧化性能的可行性。为了获得基本数据，使用了热重分析仪和填充床反应器。由于第二冶金还原铁中碳成分和痕量金属的差异，在不同的实验条件下，特别是在不同的转化温度下，反应的表现完全不同。根据表观固体转化率和出口气体浓度曲线，与空气和蒸汽的氧化反应分为两个阶段，动力学控制阶段和产物扩散阶段。此外，第二冶金还原铁和分析还原铁产生的氢气纯度分别可达到99.2％和99.9％。总体而言，与分析还原铁相比，使用第二冶金还原铁在钢铁行业的废物回收利用工业级的化学循环概念产生氢气之间提供了联系。