Low-Pressure <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msub><mi>CO</mi><mn>2</mn></msub></mrow></math></inline-formula> Capture Using Ionic Liquids to Enable Mars Propellant Production

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Low-Pressure ${CO}_{2}$ Capture Using Ionic Liquids to Enable Mars Propellant Production

Lotto, Michael A. / Nabity, James A. / Klaus, David M.

Room-temperature ionic liquids offer a potential technological approach for propellant production on Mars using in situ resources. These unique salts can be employed to preferentially capture carbon dioxide ( ${CO}_{2}$ ) from the atmosphere of the planet for subsequent processing. To explore this application, ${CO}_{2}$ and argon solubility experiments were performed with 1-butyl-3-methylimidazolium trifluoromethanesulfonate ([BMIM][Tfo]) and 1-butyl-3-methylimidazolium acetate ([BMIM][Ac]) over partial pressures of 0–84 kPa. The benchtop data are then extrapolated to anticipated specifications required for a flight-scale capture system on Mars. An artificial increase in ${CO}_{2}$ partial pressure from local atmospheric conditions (0.8 kPa) to 84 kPa will significantly reduce the required mass of ionic liquid due to enhanced uptake. Meanwhile, the mass and volume specifications of [BMIM][Ac] are more competitive than [BMIM][Tfo]. The time interval for ${CO}_{2}$ capture with [BMIM][Ac] is also shown to be a driving factor in required mass because 81% of the maximum uptake capacity is absorbed in approximately a third of the time needed to fully load the ionic liquid with ${CO}_{2}$ .

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Dokumentinformationen

Titel :

Low-Pressure ${CO}_{2}$ Capture Using Ionic Liquids to Enable Mars Propellant Production

Beteiligte:

Lotto, Michael A. (Autor:in) / Nabity, James A. (Autor:in) / Klaus, David M. (Autor:in)

Erschienen in:

Journal of Propulsion and Power ; 37 , 1 ; 100-107

Erscheinungsdatum :

2020-07-22

Format / Umfang :

8 pages

ISSN :

1533-3876

DOI :

https://doi.org/10.2514/1.B37782

Medientyp :

Aufsatz (Zeitschrift)

Format :

Elektronische Ressource

Sprache :

Englisch

Schlagwörter :

Propellant , Earth , Atmospheric Conditions , In Situ Resource Utilization , Mars Ascent Vehicle , Viscosity , Diminishing Returns , Vapour Pressure , Henry's Law , Cryocooler

Low-Pressure ${CO}_{2}$ Capture Using Ionic Liquids to Enable Mars Propellant Production

Low-Pressure ${CO}_{2}$ Capture Using Ionic Liquids to Enable Mars Propellant Production

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Low-Pressure CO 2 Capture Using Ionic Liquids to Enable Mars Propellant Production

Low-Pressure CO 2 Capture Using Ionic Liquids to Enable Mars Propellant Production

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Dokumentinformationen

Ähnliche Titel

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Low-Pressure ${CO}_{2}$ Capture Using Ionic Liquids to Enable Mars Propellant Production

Low-Pressure ${CO}_{2}$ Capture Using Ionic Liquids to Enable Mars Propellant Production