【摘要】 CO₂还原是长期载人航天中生命保障系统的关键技术,针对作为CO₂还原系统核心的反应器及其中的催化剂的效率问题,在耦合原料气预热的Sabatier固定床反应器和Ru/Al2O₃催化剂上,在宽范围的原料气氢碳比（1∶1⁵∶1）和流量（2⁸ L/min）工况下,进行了Sabatier反应拉偏试验,结果表明:反应的起动温度为150℃,在不同原料气流量和氢碳比下,反应器温度梯度分布合理,贫组分的转化率达到98%以上（氢碳比4∶1除外）。耦合原料气预热的Sabatier固定床反应器结构合理,Ru/Al2O₃催化剂活性高,能够高效处理舱室中2⁴人的代谢量。更多还原

【Abstract】 The CO₂ reduction is one of the key technologies of the life-support system in long duration manned space flight. The reactor is the hard core of the CO₂ reduction system. Sabatier reaction was tested under the H₂/CO₂ ratio from 1 ∶ 1 to 5 ∶ 1 and the flow rate of feed gas between 2. 0 ⁸. 0 L/min in a Sabatier fixed-bed reactor coupled with feed gas preheating filled with Ru/Al2O₃ catalysts. The reaction was started successfully at 150 ℃,and the distribution of temperature steps in the reactor was regular under different conditions. The conversion of the lean component reached above 98% except for the ratio of H₂ to CO₂（ 4∶ 1）. The configuration of the Sabatier fixed-bed reactor coupled with feed gas preheating was reasonable,and the activity of Ru/Al2O₃ catalysts was high. The favorable performance was achieved for a crew size of 2 4 persons in the cabin.更多还原