Sabatier CO<sub>2</sub> Reduction System Design Status

Murdoch, Karen; Scull, Timothy D.; Carrasquillo, Robyn L.; Graf, John

doi:10.4271/2002-01-2531

Cited by 2 publications

(2 citation statements)

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“…= Solid Carbon CDRA = Carbon Dioxide Removal Assembly CH 4 = Methane CO = Carbon Monoxide CO 2 = Carbon Dioxide Co-Al = Cobalt on Aluminum Catalyst Co-Sh = Cobalt Shavings Catalyst CRA = Carbon Dioxide Reduction Assembly H 2 = Hydrogen H 2 …”

Section: B-cats = Bosch Catalyst Test Stand C(s)mentioning

confidence: 99%

“…For this purpose, the Carbon Dioxide Reduction Assembly (CRA) was developed and tested in conjunction with Hamilton Sundstrand. [2][3][4][5] The CRA was delivered to ISS in April 2010 and activated in August 2010. The system operates in a CO 2 -rich environment due to limited availability of hydrogen from the the Oxygen Generation Assembly (OGA).…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Bosch-Based Systems Using Non-Traditional Catalysts at Reduced Temperatures

Abney

Mansell

2011

41st International Conference on Environmental Systems

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Oxygen and water resupply make open loop atmosphere revitalization (AR) systems unfavorable for long-term missions beyond low Earth orbit. Crucial to closing the AR loop are carbon dioxide reduction systems with low mass and volume, minimal power requirements, and minimal consumables. For this purpose, NASA is exploring using Boschbased systems. The Bosch process is favorable over state-of-the-art Sabatier-based processes due to complete loop closure. However, traditional operation of the Bosch required high reaction temperatures, high recycle rates, and significant consumables in the form of catalyst resupply due to carbon fouling. A number of configurations have been proposed for next-generation Bosch systems. First, alternative catalysts (catalysts other than steel wool) can be used in a traditional single-stage Bosch reactor to improve reaction kinetics and increase carbon packing density. Second, the Bosch reactor may be split into separate stages wherein the first reactor stage is dedicated to carbon monoxide and water formation via the reverse water-gas shift reaction and the second reactor stage is dedicated to carbon formation. A series system will enable maximum efficiency of both steps of the Bosch reaction, resulting in optimized operation and maximum carbon formation rate. This paper details the results of testing of both single-stage and two-stage Bosch systems with alternative catalysts at reduced temperatures. These results are compared to a traditional Bosch system operated with a steel wool catalyst.

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