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Influence of Oxygenated Compounds on Reaction Products in a Microwave Plasma Methane Pyrolysis Assembly for Post-Processing of Sabatier Methane

機(jī)譯:含氧化合物對(duì)微波等離子體甲烷熱解裝置中Sabatier甲烷后處理反應(yīng)產(chǎn)物的影響

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摘要

The state-of-the-art Carbon Dioxide Reduction Assembly (CRA) was delivered to the International Space Station (ISS) in April 2010. The system is designed to accept carbon dioxide from the Carbon Dioxide Removal Assembly and hydrogen from the Oxygen Generation Assembly. The two gases are reacted in the CRA in a Sabatier reactor to produce water and methane. Venting of methane results in an oxygen resupply requirement of about 378 lbs per crew member per year. If the oxygen is supplied as water, the total weight for resupply is about 476 lb per crew member per year. For long-term missions beyond low Earth orbit, during which resupply capabilities will be further limited, recovery of hydrogen from methane is highly desirable. For this purpose, NASA is pursuing development of a Plasma Pyrolysis Assembly (PPA) capable of recovering hydrogen from methane. Under certain conditions, water vapor and carbon dioxide (nominally intended to be separated from the CRA outlet stream) may be present in the PPA feed stream. Thus, testing was conducted in 2010 to determine the effect of these oxygenated compounds on PPA performance, particularly the effect of inlet carbon dioxide and water variations on the PPA product stream. This paper discusses the test set-up, analysis, and results of this testing.
機(jī)譯:最新的二氧化碳減排裝置(CRA)于2010年4月交付給國(guó)際空間站(ISS)。該系統(tǒng)的設(shè)計(jì)目的是接受來(lái)自二氧化碳清除裝置的二氧化碳和來(lái)自氧氣產(chǎn)生裝置的氫氣。兩種氣體在Sabatier反應(yīng)器中的CRA中反應(yīng)生成水和甲烷。甲烷排放導(dǎo)致每位機(jī)組成員每年需補(bǔ)充氧氣約378磅。如果以水的形式提供氧氣,則每名機(jī)組人員每年的補(bǔ)給總重量約為476磅。對(duì)于超出低地球軌道的長(zhǎng)期任務(wù),在此期間補(bǔ)給能力將進(jìn)一步受到限制,非常需要從甲烷中回收氫。為此,美國(guó)國(guó)家航空航天局(NASA)正在尋求開(kāi)發(fā)一種能夠從甲烷中回收氫的等離子體熱解組件(PPA)。在某些條件下,PPA進(jìn)料流中可能存在水蒸氣和二氧化碳(通常打算與CRA出口流分離)。因此,在2010年進(jìn)行了測(cè)試,以確定這些含氧化合物對(duì)PPA性能的影響,特別是入口二氧化碳和水分變化對(duì)PPA產(chǎn)品物流的影響。本文討論了測(cè)試設(shè)置,分析和測(cè)試結(jié)果。

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