In Situ Resource Utilization constitutes an enabling technology for future, long-term human space exploration. The potentiality of oxygen extraction from dry lunar regolith by means of carbothermal reduction is analyzed in this work. Focus is placed on the scarcely investigated temperature range 1273–1373 K, looking at the possibility to operate below the regolith melting point. The first aspect to consider is to properly identify candidate species and reaction paths that can lead to oxides reduction. This is achieved by modeling the Gibbs free energy $\Delta G^{\circ }$ trend for suitable reactions, looking at which species can react in the temperature range of interest among the minerals and oxides present in the regolith. A more detailed investigation is presented for the SiO₂ and TiO₂ oxides families, being both particularly attractive: the former for its ubiquitous presence in the lunar soil, the latter for its importance in past ISRU literature and its local peaks of concentration in specific areas on the Moon. Finally, a preliminary indication on the expected contribution of each species to the total yield is given.

原位资源利用构成了未来长期人类太空探索的使能技术。本文分析了通过碳热还原从干燥的月球表土中提取氧气的潜力。重点放在很少研究的温度范围 1273-1373  K 上，研究在风化层熔点以下操作的可能性。要考虑的第一个方面是正确识别可导致氧化物还原的候选物质和反应路径。这是通过模拟吉布斯自由能来实现的$\Delta G^{\circ }$合适反应的趋势，查看哪些物种可以在风化层中存在的矿物质和氧化物之间在感兴趣的温度范围内发生反应。_{对 SiO 2}和 TiO ₂氧化物家族进行了更详细的研究，它们都特别有吸引力：前者因其在月球土壤中无处不在，后者因其在过去的 ISRU 文献中的重要性及其在特定区域的局部浓度峰值在月球上。最后，给出了每个物种对总产量的预期贡献的初步说明。