Re: least polluting rocket fuel

Re: least polluting rocket fuel
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Re: least polluting rocket fuel Ten Quidado 01-27-2006
Posted by Ten Quidado on January 27, 2006, 12:41 pm
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Um, hydrogen isn't polluting. Rockets burning pure H2 and O2 generate
water.



Posted by Ian Woollard on January 30, 2006, 2:17 pm
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Hydrogen is quite polluting since it takes a lot of energy to
manufacture; and a lot of CO2 and doubtless other pollutants get
generated. The fact that it produces very little pollution when the
rocket flies isn't really the point.

Fuels like bioethanol and don't produce net CO2 since the plants suck
an equal amount of CO2 out of the air when they grow, so you're left
with essentially no pollution - from the fuel anyway.

The rocket itself is a different story- aluminium needs quite a bit of
energy to produce and CO2 is liberated during the electrolysis that
makes it from the ore. Still, a BOTE calculation suggests that this is
a much smaller amount of pollution than the fuel.


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