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Method for converting hydrocarbon fuel into hydrogen gas and carbon dioxide

United States Patent

September 26, 2000
View the Complete Patent at the US Patent & Trademark Office
A method is disclosed for synthesizing hydrogen gas from hydrocarbon fuel. A first mixture of steam and a first fuel is directed into a first tube 208 to subject the first mixture to a first steam reforming reaction in the presence of a first catalyst 214. A stream of oxygen-containing gas is pre-heated by transferring heat energy from product gases. A second mixture of the pre-heated oxygen-containing gas and a second fuel is directed into a second tube 218 disposed about the first tube 208 to subject the second mixture to a partial oxidation reaction and to provide heat energy for transfer to the first tube 208. A first reaction reformate from the first tube 208 and a second reaction reformate from the second tube 218 are directed into a third tube 224 disposed about the second tube 218 to subject the first and second reaction reformates to a second steam reforming reaction, wherein heat energy is transferred to the third tube 224 from the second tube 218.
Clawson; Lawrence G. (Dover, MA), Mitchell; William L. (Belmont, MA), Bentley; Jeffrey M. (Westford, MA), Thijssen; Johannes H. J. (Cambridge, MA)
Arthur D. Little, Inc. (Cambridge, MA)
09/ 185,325
November 3, 1998
GOVERNMENT RIGHTS The Government has rights in this invention pursuant to Contract No. DE-AC02-92CE50343, awarded by the U.S. Department of Energy.