EP0266875A1
Expired / Lapsed
EP
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Method of catalytic combustion using heat-resistant catalyst
Assignee: Hitachi Ltd
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Filing: 1987-09-09
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Granted: —
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Expires: 2007-09-09
Abstract
Abstract A method of catalytic combustion using a heat-resistant catalyst suitable for combustion at a temperature ranging from 800°C tp 1500°C is disclosed. The catalyst has a carrier which may be La-β-Al₂O₃ or another rear earth-alumina or a Group IIa, IIIa or IV oxide, nitride or carbide. Particles of a platinum group metal are dispersed on the carrier as active component. Dispersed on the particles of active component are particles of base metal selected from Mg, Mn, Ni, Co, Sr, Nb, Zn, Sn, Cr and Zr. The base metal has the effect of suppressing agglomeration of the active component at high temperature.
Inventors
- 👤 Akira Kato
- 👤 Hisao Yamashita
- 👤 Hiroshi Kawagoshi
- 👤 Noriko Watanabe
- 👤 Shinpei Matsuda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 06:01
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/864; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
119 words
A method of catalytic combustion which comprises contacting a hydrocarbon gas fuel at a temperature of 800 to 1500°C in the presence of oxygen with a heat-resistant catalyst composed of at least one heat-resistant inorganic carrier selected from the group consisting of oxides, carbides and nitrides of elements belonging to Groups IIa, IIIa and IV of the periodic table, particles of at least one catalytically active component selected from the group consisting of platinum group elements dispersed and carried on said carrier, and particles of an oxide of at least one base metal selected from the group consisting of magnesium, manganese, nickel, cobalt, strontium, niobium, zinc, tin, chromium, and zirconium dispersed on said par ticles of catalytically active component.
Claim 2
Independent Claim
119 words
A method of catalytic combustion which comprises contacting a hydrocarbon gas fuel at a temperature of 800 to 1500°C in the presence of oxygen with a heat-resistant catalyst composed of at least one heat-resistant inorganic carrier selected from the group consisting of oxides, carbides and nitrides of elements belonging to Groups IIa, IIIa and IV of the periodic table, particles of at least one catalytically active component selected from the group consisting of platinum group elements dispersed and carried on said carrier, and particles of an oxide of at least one base metal selected from the group consisting of magnesium, manganese, nickel, cobalt, strontium, niobium, zinc, tin, chromium, and zirconium dispersed on said par ticles of catalytically active component.
Claim 3
Dependent Claim
23 words
A method according to claim 1, wherein the atomic ratio of said base metal to said catalytically active component is 0.1 to 10.
Claim 4
Independent Claim
99 words
A method of catalytic combustion which comprises contacting a hydrocarbon gas fuel at a temperature of 800 to 1500°C in the presence of oxygen with a heat-resistant catalyst composed of at least one heat-resistant inorganic carrier comprising rare earth element-β-alumina, particles of at least one catalytically active component selected from the group consisting of platinum group elements dispersed and carried on said carrier, and particles of an oxide of at least one base metal selected from the group consisting of magnesium, manganese, nickel, cobalt, strontium, niobium, zinc, tin, chromium, and zirconium dispersed on said particles of catalytically active component.
Claim 5
Independent Claim
99 words
A method of catalytic combustion which comprises contacting a hydrocarbon gas fuel at a temperature of 800 to 1500°C in the presence of oxygen with a heat-resistant catalyst composed of at least one heat-resistant inorganic carrier comprising rare earth element-β-alumina, particles of at least one catalytically active component selected from the group consisting of platinum group elements dispersed and carried on said carrier, and particles of an oxide of at least one base metal selected from the group consisting of magnesium, manganese, nickel, cobalt, strontium, niobium, zinc, tin, chromium, and zirconium dispersed on said particles of catalytically active component.
Claim 6
Dependent Claim
23 words
A method according to claim 3, wherein the atomic ratio of said base metal to said catalytically active component is 0.1 to 10.
References Cited (Backward Citations)
US4025606A
Cited
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