US4793797A
Expired / Lapsed
US
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Method of catalytic combustion using heat-resistant catalyst
Assignee: Hitachi Ltd
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Filing: 1987-09-10
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Granted: 1988-12-27
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Expires: 2007-09-10
Abstract
Abstract This invention relates to a method of catalytic combustion using a heat-resistant catalyst and, in particular, relates to a method of catalytic combustion using a heat-resistant catalyst suitable for combustion at a temperature ranging from 800° C. to 1500° C.
Inventors
- 👤 Akira Kato
- 👤 Hisao Yamashita
- 👤 Hiroshi Kawagoshi
- 👤 Noriko Watanabe
- 👤 Shinpei Matsuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:37
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: 11
Claim 1
Independent Claim
138 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 comprised 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, palladium, rhodium and ruthenium 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, thin, chromium, and zirconium dispersed on said particles of catalytically active component, wherein the atomic ratio of said base metal to said catalytically active component is 0.1 to 10.
Claim 2
Independent Claim
138 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 comprised 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, palladium, rhodium and ruthenium 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, thin, chromium, and zirconium dispersed on said particles of catalytically active component, wherein the atomic ratio of said base metal to said catalytically active component is 0.1 to 10.
Claim 3
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 comprised 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, palladium, rhodium and ruthenium 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, wherein the atomic ratio of said base metal to said catalytically active component is 0.1 to 10.
Claim 4
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 comprised 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, palladium, rhodium and ruthenium 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, wherein the atomic ratio of said base metal to said catalytically active component is 0.1 to 10.
Claim 5
Dependent Claim
18 words
A method according to claim 2, wherein said base metal is at least one of magnesium and manganese.
Claim 6
Dependent Claim
19 words
A method according to claim 2, wherein said catalytically active component is at least one of platinum and palladium.
Claim 7
Dependent Claim
18 words
A method according to claim 4, wherein said base metal is at least one of magnesium and manganese.
Claim 8
Dependent Claim
37 words
A method according to claim 2, wherein said rare earth element-β-alumina includes at least one rare earth element selected from the group consisting of lanthanum, cerium, praseodymium, promethium, samarium, europium, gadolinium, erbium, ytterbium, yttrium, scandium and lutetium.
Claim 9
Dependent Claim
13 words
A method according to claim 6, wherein said rare earth element is lanthanum.
Claim 10
Dependent Claim
19 words
A method according to claim 7, wherein said catalytically active component is at least one of platinum and palladium.
Claim 11
Dependent Claim
18 words
A method according to claim 8, wherein said base metal is at least one of magnesium and manganese.
References Cited (Backward Citations)
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