Steel slag, a waste from steelmaking plant, has been proven to be good candidate resources for low-cost calcium-based CO₂ sorbent derivation. In this work, a cheap and sintering-resistance CaO-based sorbent (CaO (SS)) was prepared from low cost waste steel slag and was applied to enhance catalytic steam reforming of coke oven gas for production of high-purity hydrogen. This steel slag-derived CaO possessed a high and stable CO₂ capture capacity of about 0.48 g CO₂/g sorbent after 35 adsorption/desorption cycles, which was mainly ascribed to the mesoporous structure and the presence of MgO and Fe₂O₃. Product gas containing 95.8 vol% H₂ and 1.4 vol% CO, with a CH₄ conversion of 91.3% was achieved at 600 °C by steam reforming of COG enhanced by CaO (SS). Although high temperature was beneficial for methane conversion, CH₄ conversion was remarkably increased at lower operation temperatures with the promotion effects from CaO (SS), and CO selectivity has been also greatly decreased. Reducing WHSV could increase methane conversion and reduce CO selectivity due to longer reactants residence time. Reducing C/A could increase methane conversion and hydrogen recovery factor, and also decrease CO selectivity. When being mixed with catalyst during SE-SRCOG, CaO (SS) with a uniform size distribution favored methane conversion due to the high utilization efficiency of catalyst. Promising stability of CaO (SS) in cyclic reforming/calcination tests was evidenced with a hydrogen recovery factor >2.1 and CH₄ conversion of 82.5% at 600 °C after 10 cycles using CaO (SS) as sorbent.

炼钢厂产生的废钢渣已被证明是低成本钙基CO ₂吸附剂衍生的良好候选资源。在这项工作中，从低成本废钢渣中制备了一种廉价且具有抗烧结性的CaO基吸附剂（CaO（SS）），并将其用于增强焦炉煤气的催化蒸汽重整以生产高纯度氢气。经过35次吸附/解吸循环后，这种源自钢渣的CaO具有约0.48 g CO ₂ / g吸附剂的高且稳定的CO ₂捕集能力，这主要归因于介孔结构以及MgO和Fe ₂ O _3的存在。包含95.8体积％H ₂和1.4体积％CO和CH _4的产物气通过CaO（SS）增强的COG进行蒸汽重整，在600°C时可实现91.3％的转化率。尽管高温有利于甲烷转化，但在较低的操作温度下，由于CaO（SS）的促进作用，CH ₄转化率显着提高，并且CO的选择性也大大降低。由于更长的反应物停留时间，降低WHSV可以提高甲烷转化率并降低CO选择性。降低C / A可以提高甲烷转化率和氢气回收率，还可以降低一氧化碳的选择性。在SE-SRCOG中与催化剂混合时，由于催化剂的高利用率，具有均匀尺寸分布的CaO（SS）有利于甲烷转化。在循环重整/煅烧测试中，CaO（SS）的稳定稳定性得到了证明，其中使用CaO（SS）作为吸附剂，经过10个循环后，氢气回收系数> 2.1，并且在600°C下CH ₄转化率为82.5％。