Catalyst and process of hydrocarbon feedstock reformation to hydrogen and carbon monoxide
AssigneeThe United States of America as represented by the Secretary of the Army
InventorIvan Chihang Lee
Life of this patent
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Abstract
A catalytic composition is particularly well suited for hydrocarbon conversion to synthesis gas at a temperature of between 800 and 1000° Celsius. The catalytic composition includes a noble metal cluster having an X-Y-Z axial mean linear dimension of between 2 and 15 Angstroms and a super cage structure surrounding the noble metal cluster. The super cage structure stabilizes the noble metal cluster against aggregation at temperatures of 1000° Celsius. A process for reforming hydrocarbon feedstock to hydrogen and carbon monoxide is also provided that conversion to greater than 80% of theoretical yield.
Claims24
A catalytic composition for increasing the rate of conversion of a sulfur-containing hydrocarbon feedstock and an oxygen donor to hydrogen and carbon monoxide at temperatures less than or equal to 1000° Celsius, the catalytic composition comprising:
- a Y-zeolite that comprises
- an exterior surface,
- an interior volume having an interior cross-sectional area ranging from 36 to 225 square Angstroms, and
- a passage providing fluid communication for a hydrocarbon having at least 6 carbon atoms between the exterior surface and the interior volume;
- and
- a noble metal cluster having an X-Y-Z axial mean linear dimension of between 2 and 15 Angstroms within the interior volume,
- wherein the Y-zeolite stabilizes the X-Y-Z axial mean linear dimension of the noble metal cluster against aggregation at temperatures up to 1000° Celsius
- and further wherein the catalytic composition increases the rate of conversion of a sulfur-containing hydrocarbon feedstock and an oxygen donor to hydrogen and carbon monoxide at temperatures less than or equal to 1000° Celsius at a yield of said conversion of at least 80 percent.
A catalytic composition for increasing the rate of conversion of a hydrocarbon feedstock to hydrogen and carbon monoxide at temperatures less than or equal to 1000° Celsius, the catalytic composition comprising a Y zeolite comprising
- an exterior surface having a surface area of between 170 and 350 meters2 per gram at 925° Celsius, and having cages containing a rare earth atom selected from the group consisting of samarium, dysprosium, and erbium,
- an interior volume having a cross-sectional area ranging from 36 to 225 square Angstroms, and
- a passage adapted to provide fluid communication for a hydrocarbon having at least 6 carbon atoms between the exterior surface and the interior volume;
- and
- a rhodium cluster having an X-Y-Z axial mean linear dimension of between 2 and 15 Angstroms, within the interior volume,
- wherein the Y zeolite stabilizes the X-Y-Z axial mean linear dimension of the rhodium cluster against aggregation at temperatures up to 1000° Celsius and further wherein the catalytic composition increases the rate of conversion of a hydrocarbon feedstock to hydrogen and carbon monoxide at temperatures less than or equal to 1000° Celsius to a yield of said conversion of at least 84 percent.
Dependencies are inferred from the claim text.