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 (${\mathrm{CO}}_2$) from the atmosphere of the planet for subsequent processing. To explore this application, ${\mathrm{CO}}_2$ 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 ${\mathrm{CO}}_2$ 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 ${\mathrm{CO}}_2$ 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 ${\mathrm{CO}}_2$.

室温离子液体为在火星上使用现场资源生产推进剂提供了一种潜在的技术途径。这些独特的盐可用于优先捕获二氧化碳（${\mathrm{一氧化碳}}_2$）从行星大气中进行后续处理。要探索此应用程序，${\mathrm{一氧化碳}}_2$氩气溶解度实验是在0-84 kPa的分压下，用三氟甲磺酸1-丁基-3-甲基咪唑鎓盐（[BMIM] [Tfo]）和乙酸1-丁基-3-甲基咪唑鎓盐（[BMIM] [Ac]）进行的。然后将台式数据外推到火星飞行规模捕获系统所需的预期规格。人为增加${\mathrm{一氧化碳}}_2$从局部大气条件（0.8 kPa）到84 kPa的分压将显着降低离子液体的所需质量，因为吸收量增加了。同时，[BMIM] [Ac]的质量和体积规格比[BMIM] [Tfo]更具竞争力。的时间间隔${\mathrm{一氧化碳}}_2$ [BMIM] [Ac]的捕集也是所需质量的驱动因素，因为最大吸收容量的81％在将离子液体完全充满所需的大约三分之一时间内被吸收了。 ${\mathrm{一氧化碳}}_2$。