Recycling oxygen from spaceflight solid waste for life support system: Potential of pyrolysis process
Recycling oxygen from spaceflight solid waste for life support system: Potential of pyrolysis process
复制标题
从航天固体废物中回收氧气用于生命维持系统：热解过程的潜力
DOI：
10.1016/j.cej.2017.10.024
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发表时间：
2018-02
影响因子：
15.1
通讯作者：
Zhi-Yuan Zhang
中科院分区：
文献类型：
--
作者：
Rui Shi;Fu-Shen Zhang;Zhi-Yuan Zhang
在载人航天器中回收固体废物以回收氧气在长期太空任务中极其重要。在当前的研究中，对热解过程进行了评估，以研究从航天固体废物（SSW）中回收氧气的潜力。采用低保真废物替代物（LFWS）来模拟长期太空任务中产生的固体废物，并研究了各种热解产物中的氧气分布和含氧物质。与陆地城市固体废物相比，SSW的氧、氮、硫含量较高，但碳含量却低得多。通过热解处理从SSW中回收的氧气量高于从陆地固体废物中回收的氧气量。此外，通过调节处理温度，SSW中更多的氧气可以很容易地转化为气相，用于氧气回收。 SSW中近50%的氧气以气态产物的形式被回收，700℃时最佳氧气回收效率为29.54%。从SSW回收氧气是提高生命维持系统中氧气循环闭合水平的理想方法。这项工作为长期太空任务期间从 SSW 回收氧气提供了基础信息。
Recycling of solid waste for oxygen recovery in manned spacecraft is extremely important during long-term space missions. In the current study, pyrolysis process was evaluated to investigate the recovery potential of oxygen from spaceflight solid waste (SSW). A low fidelity waste surrogate (LFWS) was employed to simulate the solid waste produced during long-term space missions, and the oxygen distribution and oxygen-containing species in various pyrolysis products were investigated. In comparison with terrestrial municipal solid waste, SSW has higher content of oxygen, nitrogen and sulfur, but the content of carbon is much lower. The amount of oxygen recovered from SSW was higher than from terrestrial solid waste by pyrolysis treatment. Moreover, much more oxygen in SSW could be easily converted into the gaseous phase for oxygen recovery by adjusting treatment temperature. Nearly 50% of oxygen in SSW was recovered in the form of the gaseous product, and the optimal oxygen recovery efficiency was 29.54% at 700 °C. Recycling oxygen from SSW is a desirable approach to improve the closure level of oxygen cycle in the life support system. This work provides fundamental information for oxygen recycling from SSW during long-term space missions.
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