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1. Overview of Workshop Goals An ongoing challenge in the long-term campaign to explore Mars is the mass and complexity involved in transporting consumables from Earth to the Martian surface. Key mission consumables are oxygen and fuel, which are planned to be used for crewed ascent from the Mars surface. These consumables are also critical for providing a breathable atmosphere, as a reactant for power generation from fuel cells, and for the production of other consumables necessary for human missions on Mars. Previous studies have shown that in-situ resource utilization (ISRU) provides a viable pathway for supplying fuel and oxygen to these mission applications by reducing readily available carbon dioxide from the Martian atmosphere for oxygen and producing fuel with either locally-obtained water or hydrogen brought from Earth. Ambient carbon dioxide reduction is likely to minimize or even eliminate the need to transport large quantities of oxygen from Earth to Mars. To successfully support crewed ascent from the Mars surface, large amounts of fuel and oxygen (e.g., 15 to 20 metric tons per Martian year) will be needed, necessitating development of approaches to carbon dioxide reduction. This Keck Institute for Space Sciences (KISS) study examined the viability of the photoelectro- chemical (PEC) or electrochemical (EC) production of fuel (e.g., carbon monoxide or methane) and oxygen from atmospheric carbon dioxide and, if available, mined and purified water on Mars. Rather than using a high-temperature solid oxide electrolysis process, sunlight would either be used directly with a catalytic process to effect the low temperature conversion of carbon dioxide to fuel and oxygen using large-area deployable PEC panels, or photovoltaic-powered electrochemical conversion would be employed at near-Mars surface ambient temperatures.PDF Image | ISRU Challenge Production of O2 and Fuel from CO2
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