Estimation of the solar‐to‐fuel energy conversion efficiency (with and without heat recuperation) of the Sm₂O₃/SmO‐based solar‐driven thermochemical CO₂ splitting cycle is reported. HSC Chemistry 9.9 software and its thermodynamic database were utilized for the thermodynamic analysis. The temperatures required for the partial thermal reduction (TR) of Sm₂O₃ and the reoxidation of SmO via CO₂ splitting (CS) reaction were identified. The thermodynamic modeling equations and the process flow configuration for the Sm₂O₃/SmO‐based CO₂ splitting (Sm‐CS) cycle were formulated. The obtained results indicate that a higher quantity of solar energy input was needed to increase the percentage of partial TR of Sm₂O₃. The solar‐to‐fuel energy conversion efficiency (without heat recuperation) was first increased up to 9.13% for 50% of TR‐Sm and then decreased to 6.54% as the %TR‐Sm further enhanced to 100%. The application of heat recuperation was beneficial not only to increase the solar‐to‐fuel energy conversion efficiency but also to decrease the TR temperature required for the attainment of the maximum efficiency value. © 2020 Society of Chemical Industry and John Wiley & Sons, Ltd.

中文翻译：

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估算太阳能驱动的氧化sa基热化学CO2分流循环的太阳能转化为燃料的效率

报告了基于Sm ₂ O ₃ / SmO的太阳能驱动热化学CO ₂分解周期的太阳能转化为燃料的能量转换效率（带或不带热回收）的报告。使用HSC Chemistry 9.9软件及其热力学数据库进行热力学分析。确定了Sm ₂ O ₃的部分热还原（TR）和通过CO ₂分解（CS）反应使SmO再氧化所需的温度。基于Sm ₂ O ₃ / SmO的CO ₂的热力学建模方程和工艺流程配置制定了分裂（Sm-CS）周期。获得的结果表明，需要更多的太阳能输入以增加Sm ₂ O ₃的部分TR的百分比。对于50％的TR-Sm，太阳能到燃料的能量转换效率（不进行换热）首先提高到9.13％，然后随着％TR-Sm进一步提高到100％，降低到6.54％。换热的应用不仅有益于提高太阳能到燃料的能量转换效率，而且有利于降低达到最大效率值所需的TR温度。©2020年化学工业协会和John Wiley＆Sons，Ltd.