Scientists have investigated discrete burning, a combustion process where fire jumps between fuel sources, by experimenting with iron powder in a microgravity environment. This research, led by teams from McGill University and Eindhoven University, was conducted aboard parabolic flights and sounding rockets to explore the unique characteristics of burning iron in zero gravity. Unlike traditional fuels that release carbon dioxide, burning iron produces iron oxide, or rust, which is non-toxic and endlessly recyclable. This discovery has paved the way for efficient iron-burning furnaces, leading to the establishment of a carbon-free, circular energy storage system, exemplified by a demonstration plant operating in The Netherlands.
In addition to terrestrial applications, this metal fuel could serve as an energy source for sustainable lunar outposts, utilizing lunar minerals and ice to create the necessary metallic powders and hydrogen for propulsion and water supply. The ongoing advancements in metal fuel technology have attracted multiple start-ups focused on harnessing this carbon-free energy for industrial uses. This innovative approach to energy storage and combustion not only presents solutions for current energy challenges on Earth but also holds promise for future space exploration, potentially revolutionizing how energy is generated and utilized on the Moon.
