In this paper we present the first systematic review of Power to X processes applied to the iron and steel industry. These processes convert renewable electricity into valuable chemicals through an electrolysis stage that produces the final product or a necessary intermediate. We have classified them in five categories (Power to Iron, Power to Hydrogen, Power to Syngas, Power to Methane and Power to Methanol) to compare the results of the different studies published so far, gathering specific energy consumption, electrolysis power capacity, CO₂ emissions, and technology readiness level. We also present, for the first time, novel concepts that integrate oxy-fuel ironmaking and Power to Gas. Lastly, we round the review off with a summary of the most important research projects on the topic, including relevant data on the largest pilot facilities (2–6 MW).

在本文中，我们将首次对应用于钢铁行业的Power to X流程进行系统的综述。这些过程通过可产生最终产品或必要中间体的电解阶段将可再生电力转化为有价值的化学物质。我们将它们分为五个类别（电力转化为铁，电力转化为氢气，电力转化为合成气，电力转化为甲烷和电力转化为甲醇），以比较迄今为止发表的不同研究的结果，收集比能耗，电解功率，CO ₂排放量和技术准备水平。我们还首次提出了将氧燃料炼铁和电力制气相结合的新颖概念。最后，我们以该主题最重要的研究项目作为总结，包括最大试点设施（2–6 MW）的相关数据。