Martian resource locations: Identification and optimization

Chamitoff, Gregory; James, G. H.; Barker, Donald G.; Dershowitz, Adam L.

doi:10.1016/j.actaastro.2004.12.004

Cited by 12 publications

(11 citation statements)

References 1 publication

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“…he closed-loop cabin Atmosphere Revitalization System (ARS), which includes the CO 2 Removal Assembly (CDRA), Oxygen Generator Assembly (OGA), and CO 2 Reduction Assembly (CRA), has become an integral part of NASA mission architectures for future long-duration human space exploration to the Moon and Mars. 1,2 In the current International Space Station (ISS) and other low orbit missions, the metabolically generated CO 2 is removed from the cabin air and vented into space, resulting in a net loss of O 2 .…”

Section: Introductionmentioning

confidence: 99%

“…1,2 In the current International Space Station (ISS) and other low orbit missions, the metabolically generated CO 2 is removed from the cabin air and vented into space, resulting in a net loss of O 2 . This requires a continuous resupply of O 2 via water electrolysis, and thus highlights the need for large water storage.…”

Section: Introductionmentioning

confidence: 99%

“…4,5 A highly efficient closed-loop ARS will result in a near complete closure of O 2 , which would significantly reduce the required amount of water resupply, providing cost and logistics savings. Additionally, the use of the Sabatier process as part of the In-Situ Resource Utilization (ISRU) application for on-site production of life support consumables and propellants from Lunar and Martian regolith (i.e., CO 2 and CO from carbothermal reduction of regolith or from the Martian atmosphere) is of interest to NASA. [6][7][8] In the Sabatier or CO 2 methanation process, CO 2 reacts with hydrogen in the presence of catalysts to produce methane and water, as shown in Eq.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Compact and Lightweight Sabatier Reactor for Carbon Dioxide Reduction

Junaedi

Hawley

Walsh

et al. 2011

41st International Conference on Environmental Systems

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Compact and Lightweight Sabatier Reactor for Carbon Dioxide Reduction

Junaedi

Hawley

Walsh

et al. 2011

41st International Conference on Environmental Systems

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“…he CO 2 Reduction Assembly (CRA) along with the CO 2 Removal Assembly (CDRA) and Oxygen Generator Assembly (OGA) have long been an integral part of the closed-loop cabin Atmosphere Revitalization System (ARS) for future long-duration human space exploration to the Moon and Mars. 1,2 In the current International Space Station (ISS) and other low orbit missions, the metabolically generated CO 2 is removed from the cabin air and is vented into space, resulting in a net loss of O 2 .…”

Section: Introductionmentioning

confidence: 99%

“…1,2 In the current International Space Station (ISS) and other low orbit missions, the metabolically generated CO 2 is removed from the cabin air and is vented into space, resulting in a net loss of O 2 . This requires a continuous re-supply of O 2 via water electrolysis, and thus highlights the need for large water storage.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Staged Bosch Process for CO2 Reduction to Produce Life Support Consumables

Vilekar

Hawley

Junaedi

et al. 2012

42nd International Conference on Environmental Systems

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Utilizing carbon dioxide to produce water and hence oxygen is critical for sustained manned missions in space, and to support both NASA's cabin Atmosphere Revitalization System (ARS) and In-Situ Resource Utilization (ISRU) concepts. For long term missions beyond low Earth orbit, where resupply is significantly more difficult and costly, open loop ARS, like Sabatier, consume inputs such as hydrogen. The Bosch process, on the other hand, has the potential to achieve complete loop closure and is hence a preferred choice. However, current single stage Bosch reactor designs suffer from a large recycle penalty due to slow reaction rates and the inherent limitation in approaching thermodynamic equilibrium. Developmental efforts are seeking to improve upon the efficiency (hence reducing the recycle penalty) of current single stage Bosch reactors which employ traditional steel wool catalysts. Precision Combustion, Inc. (PCI), with support from NASA, has investigated the potential for utilizing catalysts supported over short-contact time Microlith substrates for the Bosch reaction to achieve faster reaction rates, higher conversions, and a reduced recycle flows. Proof-of-concept testing was accomplished for a staged Bosch process by splitting the chemistry in two separate reactors, first being the reverse water-gas-shift (RWGS) and the second being the carbon formation reactor (CFR) via hydrogenation and/or Boudouard. This paper presents the results from this feasibility study at various operating conditions. Additionally, results from two 70 hour durability tests for the RWGS reactor are discussed. Nomenclature °C= degree Celsius cm = centimeter d = diameter ft = foot g-cat = gram of metal catalyst GSA = geometric surface area hr = hour in = inch kJ = kilojoules L = liter m = meter ml = milliliter

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Origin of the Excellent Performance of Ru on Nitrogen‐Doped Carbon Nanofibers for CO₂ Hydrogenation to CH₄

2016

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Carbon materials have rarely been used as support for CO methanation, which is usually carried out using catalysts supported on metal oxides. Here, it is shown that Ru nanoparticles supported on nitrogen-doped carbon nanofibers (NCNF) provide competitive CH production rate and stability compared to Al O -supported catalysts. Contrary to the general belief about the inert nature of carbon supports, it is demonstrated that NCNF is a non-innocent spectator in CO methanation due to its ability to store a high amount of CO reaction intermediates. This explains the excellent catalytic behaviour afforded by this unconventional catalyst support.

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Martian resource locations: Identification and optimization

Cited by 12 publications

References 1 publication

Compact and Lightweight Sabatier Reactor for Carbon Dioxide Reduction

Compact and Lightweight Sabatier Reactor for Carbon Dioxide Reduction

Performance Evaluation of Staged Bosch Process for CO2 Reduction to Produce Life Support Consumables

Origin of the Excellent Performance of Ru on Nitrogen‐Doped Carbon Nanofibers for CO₂ Hydrogenation to CH₄

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Martian resource locations: Identification and optimization

Cited by 12 publications

References 1 publication

Compact and Lightweight Sabatier Reactor for Carbon Dioxide Reduction

Compact and Lightweight Sabatier Reactor for Carbon Dioxide Reduction

Performance Evaluation of Staged Bosch Process for CO2 Reduction to Produce Life Support Consumables

Origin of the Excellent Performance of Ru on Nitrogen‐Doped Carbon Nanofibers for CO2 Hydrogenation to CH4

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Origin of the Excellent Performance of Ru on Nitrogen‐Doped Carbon Nanofibers for CO₂ Hydrogenation to CH₄