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CO2还原是目前国际空间站CO2处理的一个重要环节。CO2还原技术不仅可以实现对人体代谢产生的CO2进行处理,还可以与电解水技术结合起来实现氧气的再生。空间站所采用的CO2还原技术包括Sabatier、Bosch、CO2电解、CO2热解等还原方法。经过三十多年的理论与实验研究,最终Sabatier还原法被确定为国际空间站的CO2还原方案。然而,Sabatier方法的循环闭合度较低,难以应用在宇宙深空探测等更长期的载人航天任务中。其他可实现完全闭合的还原法仍有可能在技术充分发展后,取代Sabatier成为性能更优的还原技术。
CO2 reduction is currently an important part of the CO2 treatment of the International Space Station. CO2 reduction technology can not only realize the CO2 produced by human metabolism, but also combine with electrolyzed water technology to realize the oxygen regeneration. CO2 reduction technologies used in space stations include Sabatier, Bosch, CO2 Electrolysis and CO2 Pyrolysis. After more than thirty years of theoretical and experimental research, the final Sabatier reduction method has been identified as the CO2 reduction program for the International Space Station. However, the Sabatier method has a low degree of loop closure and is difficult to apply to longer-term manned space missions such as deep space exploration in the universe. Other restorative methods that can achieve full closure are still likely to replace Sabatier as a better performing reduction technology when technology is fully developed.