Exhaust pipes get pretty hot. Or perhaps we might reuse/recycle the steam from engine exhaust. Note: ambient air need not be extremely hot to be saturated (100% humidity.)
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United States Patent Application 20050029120
Kind Code A1
Bar-Gadda, Ronny February 10, 2005
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Radiant energy dissociation of molecular water into molecular hydrogen
Can be viewed at:
http://www.freshpatents.com/Radiant-ene ... molecular-
water-into-molecular-hydrogen-dt20050210ptan20050029120.php
and
http://appft1.uspto.gov/netacgi/nph-Par ... ct2=HITOFF
&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=
50&s1=%2220050029120%22.PGNR.&OS=DN/20050029120&RS=DN/2005
0029120