High-temperature electrolysis (HTE) is a key to link the electricity sector with other industries and to evolve the electricity transition into a full energy transition. After years of development, HTE is now on the threshold to reach market readiness. The present work shows the latest achievements of Sunfire's development based on the results of the project GrInHy2.0 demonstrating hydrogen production (solid oxide electrolysis cell [SOEC]) in an industrial environment and the project SynLink demonstrating co-electrolysis (Co-SOEC) for renewable synthesis gas production. The GrInHy2.0 system is a 720 kW_AC electrolyzer operating in the iron-and-steel works Salzgitter (Germany). It is now in operation for approx. 14,500 h and achieved a mean degradation rate below 23 mOhm cm² kh⁻¹ and an electrical efficiency of up to 84%_LHV. It also proved that HTE now reached industrial-relevant availability of over 90%. While the HTE system in Salzgitter consists of eight modules, a single module was tested in co-electrolysis mode within the project SynLink. It demonstrated synthesis gas generation via Co-SOEC with a flexible H₂/CO ratio between 1 and 4. The work provides insight into how HTE will play a major role in the near future to efficiently produce renewable feedstock for an economy with a drastically reduced carbon footprint.

中文翻译：

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高温电解系统的示范和放大

高温电解（HTE）是将电力行业与其他行业联系起来并将电力转型发展为全面能源转型的关键。经过多年的发展，HTE 现在已迈入市场准备阶段。目前的工作展示了 Sunfire 的最新开发成果，该成果基于 GrInHy2.0 项目（演示工业环境中的制氢（固体氧化物电解槽 [SOEC]））和 SynLink 项目（演示共电解（Co-SOEC））的成果。可再生合成气生产。GrInHy2.0 系统是一台 720 kW_交流电解槽，在萨尔茨吉特钢铁厂（德国）运行。它现在运行了大约。14,500小时，平均降解率低于23 mOhm cm ² kh ^-1，电效率高达84% _LHV。它还证明，HTE 目前的工业相关可用性已达到 90% 以上。虽然 Salzgitter 的 HTE 系统由八个模块组成，但在 SynLink 项目中以共电解模式对单个模块进行了测试。它展示了通过 Co-SOEC 生成合成气，其 H ₂ /CO 比例在 1 到 4 之间。这项工作深入了解了 HTE 将如何在不久的将来发挥重要作用，为经济大幅减少的经济体高效生产可再生原料。碳足迹。