These methane-liquid oxygen systems, often termed "methalox," provide multiple benefits. Methane is more suitable for reusable propulsion as it produces less carbon buildup compared to kerosene, which fuels SpaceX’s Falcon 9. It is simpler to manage than hydrogen, which tends to escape and requires extreme cooling near minus 423°F (minus 253°C). While methane also operates at cryogenic conditions, its storage temperature is milder—closer to that of liquid oxygen, ranging from minus 260°F to minus 297°F (minus 162°C to minus 183°C).
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