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US 7,998,455 B2Granted
Process for hydrogen gas production from carbohydrate feedstocks
AssigneeArcher Daniels Midland Company
InventorsCharles A. Abbas, Thomas P. Binder, Leif P. Solheim, Mark Matlock
Life of this patent
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Abstract
A method for producing hydrogen from a plant source is disclosed. The method includes contacting a crude carbohydrate material obtained from the plant source with water and a catalyst at a temperature and pressure sufficient to decompose at least a portion of the crude carbohydrate material to form a vapor mixture of gases including hydrogen, and separating hydrogen from other gases present in the vapor mixture.
Claims17
A method for producing hydrogen from a plant source, comprising:
- obtaining a plant fiber material obtained by separating the fiber material from starchy material of an agricultural grain;
- if needed, adding water to bring the fiber material to a moisture level of about 70%;
- heating the fiber material in a sealed reactor to a temperature of between about 135° C. and 225° C. for about 30 to 60 minutes to form a heat and pressure treated plant fiber material;
- separating from the heat and pressure treated fiber material an aqueous liquid mixture containing oligosaccharides and a solids fraction;
- contacting the aqueous liquid mixture containing oligosaccharides with a catalyst at a temperature and pressure sufficient to decompose at least a portion of the oligosaccharides in the mixture to form a vapor mixture of gases including hydrogen;
- and
- separating hydrogen from other gases present in the vapor mixture.
4 more elements
A method for producing hydrogen from plant fiber source, comprising:
- a. pressurizing an autoclave containing said plant fiber source, water and a catalyst with steam;
- b. heating said plant fiber source at a temperature of at least about 500° C. and pressure sufficient to convert said plant fiber source into an oligosaccharide containing aqueous liquid;
- and
- c. contacting said oligosaccharide containing aqueous liquid with a catalyst at a temperature and pressure sufficient to decompose said oligosaccharides to form hydrogen.
1 more element
Dependencies are inferred from the claim text.