"In this case; how do they recombine..." that is exactly what the article is about. E-fuels are atmospheric carbon dioxide that is electrolyzed using renewable sources and combined with additional hydrogen in order to produce octane. So, my original parent is saying the process we should focus on is sequestration (Atmospheric carbon dioxide -> electrolyze to carbon and oxygen [this is the energy intensive step] -> bury the carbon and leave the oxygen -> harvest natural hydrocarbons / oil -> distill into various weights -> burn the octane). I propose achieving similar atmospheric carbon balance with similar energy inputs with the cycle (Atmospheric carbon dioxide -> electrolyze to carbon and oxygen [same energy per carbon] -> hydogenate the carbon to octane for portability and compatibility reasons -> burn the octane). The only point in doing all of this of course is the huge installed user base for engines that burn octane, a portable and stable fuel.
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