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To: wpckr who wrote (4214)	5/23/1999 11:41:00 AM
From: gg cox	Respond to of 5827

Subject 14466

To: wpckr who wrote (4214)	5/23/1999 12:04:00 PM
From: gg cox	Respond to of 5827

From Praxair web site. "Hydrogen Production Hydrogen is produced industrially as a gas or a liquid by several methods. These include: Steam reforming, a reaction of natural gas (methane) or other light hydrocarbons (ethane or propane) with steam in the presence of a catalyst Electrolysis of water, a process which transforms water into its elemental parts through the use of an electric current Ammonia dissociation, the breaking up of ammonia into its simpler components, namely hydrogen and nitrogen Partial oxidation, a reaction of hydrocarbons (such as natural gas, naphtha, petroleum coke or coal) with oxygen to produce hydrogen and carbon monoxide In addition, hydrogen is obtained as a by-product of some refining and chemical production processes. Manufacturers use pressure swing adsorption (PSA), cryogenic separation and membrane gas separation technology to purify crude hydrogen."