On 7/9/2014 11:19 AM, 'Chris de Morsella' via Everything List wrote:
Liquid hydrogen is hard to make and store (it needs to be liquefied to near absolute zero -- an energy intensive process all by itself); the volumetric density of liquid hydrogen is not all that impressive either. Liquid hydrogen is also aggressive chemically and causes metal tank walls to become brittle over time. Biofuels seem superior
Yeah, hydrogen can be no more than an energy delivery medium. It's not a primary power source. As a delivery medium it sucks.
But biofuels, which are primary (solar) energy source, are extremely inefficient. Corn to alcohol barely exceeds one on the EROI. Maybe some genetic engineered algae will do a lot better but I doubt they will come close to wind, hydro, and solar-thermal or even photovoltaic technology.
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