you can't possibly make that process self-sustaining.
from an energy point of view. the only way to do it and "make" energy is biologically.

"Divert enough of the energy back to get it self sustaining" - you're talking the equivalent of a perpetual motion machine. Only one that actually makes motion out of nothing.
( the mighty badger Aphrodite, on a bar stool, by your side, Wed 14 Mar 2012, 11:33, 1 reply, 13 years ago)

I know where you're coming from
but it's not perpetual motion because there's a whole shitload of feeder fuel coming in.
(PsychoChomp, Wed 14 Mar 2012, 11:55, Reply)

what they are doing is catalytic hydrocarbon cracking by another name
it's energy negative. always has been and always will be.
( the mighty badger Aphrodite, on a bar stool, by your side, Wed 14 Mar 2012, 12:15, Reply)