Sabatier反应器的小型化研究

Investigation on Miniaturation of Sabatier Reactor

针对中长期载人航天CO2处理与02循环再生问题,在Sabatier反应热力学分析的基础上,通过优化反应器高低温区的反应温度及进出口温度并预测冷却气体的最佳流量及出口温度,提出了适于载人航天的Sabatier反应流程及基于微化工技术的微反应器设计方案,制造出一套地面Sabatier反应试验样机.在H2/CO2摩尔比为3.5、原料气流量为4.3L/min、高温反应器温度为260-268℃、低温反应器温度为210-235℃的条件下,头现了4500小时稳定运行、耳转化率大于98%、系统压力降小于4kPa的结果,为未来实用微反应器的设计奠定了技术基础.

At present, Sabatier reaction was considered the main technology of the oxygen recycling in the long-duration manned spaceflights. In this paper, the thermodynamics of the Sabatier reaction was analyzed in detail. By optimizing the reaction temperature of high or low temperature region in the reactor and the temperature in the outlet, and by predicting the optimal flow rate and the outlet temperature of cooling gas, the technological process suitable for manned space flight and the novel design of system based on Microchemical Engineering and Technology for Sabatier reaction were proposed .Moreover, a prototype ground Sabatier reactor was manufactured. For H2/CO2 molar ratio of 3.5, the feed gas flow of 4. 3 L/min, the high temperature reactor of 260-268℃ , low temperature reactor of 210 -235℃ ,and the stable operation of at least 4,500 hours were achieved under the conditions of 9 8 % H2 conversion and 4 kPa pressure drop. The results may establish a good foundation for the design of lighter, smaller, more compact, and more efficient microreactor in the future