Catalytic partial oxidation of hydrocarbons
OwnerSatish S. Tamhankar, Narayanan Ramprasad +2inventors
InventorsSatish S. Tamhankar, Narayanan Ramprasad, YuDong Chen, Mark S. Tomczak
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Abstract
A process and a metal catalyst are provided for the partial oxidation of hydrocarbons to produce hydrogen and carbon monoxide. The process is conducted by contacting a mixture of a hydrocarbon-containing gas and an oxygen-containing gas in the presence of a metal catalyst. The metal catalyst is a transition or noble metal supported on a ceria monolith substrate. Partial oxidation of hydrocarbons can be carried out at low initiation temperatures with high product yields.
Claims31
A process for the partial oxidation of hydrocarbons to produce hydrogen and carbon monoxide, the process comprising contacting a mixture of a hydrocarbon containing feed gas and an oxygen containing feed gas with a catalytically effective amount of a reduced metal catalyst consisting essentially of a transition or noble metal selected from the group of nickel, cobalt, iron, platinum, palladium, iridium, rhenium, ruthenium, rhodium, osmium and combinations thereof supported on or in a ceria monolith substrate at a pressure of between 1 and 20 atmospheres, a feed gas standard gas hourly space velocity of about 50,000 to about 500,000 hr−1, and a linear velocity of about 0.5 to 5.0 ft/s;
- wherein a product gas mixture comprising hydrogen and carbon monoxide with less than 3% carbon dioxide is produced.
A process for the partial oxidation of hydrocarbons to produce hydrogen and carbon monoxide comprising first contacting a metal catalyst consisting essentially of a transition or noble metal selected from the group of nickel, cobalt, iron, platinum, palladium, iridium, rhenium, ruthenium, rhodium, osmium and combinations thereof supported on or in a ceria monolith substrate with a reducing environment to substantially reduce said metal catalyst and its support materials and subsequently contacting said substantially reduced metal catalyst with a mixture of a hydrocarbon-containing feed gas and an oxygen-containing feed gas;
- wherein said hydrocarbon-containing feed gas contains hydrocarbons having between one and five carbon atoms, and said partial oxidation of hydrocarbons can be initiated at temperatures less than about 200° C.
A monolith substrate for supporting a catalyst for catalytic reactions, comprising between about 0.1% and about 3% titania and between about 75% and about 99.9% ceria.
A metal catalyst for catalytic reactions, comprising:
- a metal supported by a monolith substrate comprising between about 0.1% and about 3% titania and between about 75% and about 99.9% ceria;
- wherein said metal is selected from the group consisting of transition metals and noble metals.
A process for partial oxidation of hydrocarbons, comprising:
- (a) providing a feed gas mixture comprising a hydrocarbon-containing gas and an oxygen-containing gas to a reactor;
- (b) contacting said feed gas mixture with a transitional or noble metal supported by a monolith substrate comprising about 1% by weight of titania and about 99% of ceria;
- and
- (c) initiating a partial oxidation reaction for said feed gas mixture at temperatures less than about 200° C.
Dependencies are inferred from the claim text.