A couple of weeks ago Audi made an announcement claiming to have invented a process that manufactured diesel solely from water, carbon dioxide and renewable energy sources. This new sustainable diesel was christened e diesel. Former Oil Drum colleague Robert Rapier (RR) has already run some energy and cost numbers on the process to reveal it in its true colours. Robert I feel was rather conservative in his analysis. In this post I use Robert’s back of envelope calculations as a starting point to expose some of the harsh thermodynamic, economic and social realities.
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