| Hydrogen, the lightest element, is a colorless, odorless, tasteless
and flammable gas found at concentrations of about 100 ppm (0.01%) in
the air.
Sources for this gas are numerous, including dissociation of ammonia,
electrolysis of water, and extraction from by-product streams of
chemical and petroleum processing.
Hydrogen is widely used in the petroleum refinery processes of
hydro treating and hydrocracking, and serves the food industry by
turning inedible grease into soaps and animal feeds.
In the welding industry, Hydrogen is used as a fuel in
underwater oxy-hydrogen torches, and for metal welding and
brazing. The space program also uses hydrogen as a rocket fuel
when weight and energy considerations are paramount. |
