Abstract: Catalysts for the decomposition of N2O into nitrogen and oxygen in the gas phase, which comprises a porous support composed of polycrystalline or vitreous inorganic material, a cerium oxide functional layer applied thereto and a layer of oxidic cobalt-containing material applied thereto are described. The catalysts can be used, in particular, as secondary or tertiary catalysts in nitric acid plants.

Abstract: Catalysts for the decomposition of N2O into nitrogen and oxygen in the gas phase, which comprises a porous support composed of polycrystalline or vitreous inorganic material, a cerium oxide functional layer applied thereto and a layer of oxidic cobalt-containing material applied thereto are described. The catalysts can be used, in particular, as secondary or tertiary catalysts in nitric acid plants.

Abstract: Composites and methods useful for oxygen sorption and other uses are presented, the composites comprising: (A) one or more crystalline ceramic oxides selected from compounds within general formula (1): AxA?x?ByB?y?O3-? and ??(1) (B) one or more crystalline ceramic oxides selected from compounds within general formulas (2), (3), (4), (5), (6), (7), and (8): A2BO4-???(2) A2B2O5-???(3) AO(ABO3-?)n??(4) AM2Cu3O7-???(5) Bi4V2(1-x)Me2xO11-3x,??(6) A?B?O3??(7) A2B2O7-?.

Abstract: Compositions and methods useful for oxygen sorption and other uses are presented, the compositions A composite material comprising components (A) and (B), wherein component (A) is selected from crystalline ceramic materials capable of forming a stable, reversible perovskite crystal phase at elevated temperatures (T>500° C.), and combinations thereof, and component (B) comprises a metal selected from rhodium (Rh), platinum (Pt), palladium (Pd), nickel (Ni) and silver (Ag), and combinations and alloys of these metals.

Abstract: Compositions and methods useful for oxygen sorption and other uses are presented, the compositions being within the general formulas (1), (2), (3), and (4): AxByO3-?, ??(1) AxA?x?ByB?y?O3-?, and ??(2) AxA?x?A?x?ByB?y?B?y?O3-?, ??(3) MOn ??(4) and combinations thereof, especially those where the B sites are independently selected from cations of the d block transition metals Cr, Mn, Fe, Co, Ni, and Cu. One desirable set of compositions of the invention are combinations of any one or more of the compounds of generals formulas (1), (2), or (3) with one or more compounds of the general formula (4). In combination with an active support or matrix oxide within general formulas (1), (2), and (3), stability of the binary metal oxides within general formula (4) can be enhanced, while extending the oxygen sorption/desorption capacities of the matrix oxide.

Abstract: Composites and methods useful for oxygen sorption and other uses are presented, the composites comprising: (A) one or more crystalline ceramic oxides selected from compounds within general formula (1): AxA?x?ByB?y?O3-???(1) and (B) one or more crystalline ceramic oxides selected from compounds within general formulas (2), (3), (4), (5), (6), (7), and (8): A2BO4-???(2) A2B2O5-???(3) AO(ABO3-?)n ??(4) AM2Cu3O7-???(5) Bi4V2(1-x)Me2xO11-3x, ??(6) A?B?O3 ??(7) A2B2O7-???(8)

Abstract: Compositions and methods useful for oxygen sorption and other uses are presented within the general formulas (1), (2), (3), (4), (5), (6), and (7): A2BO4?? (1) A2B2O5?? (2) AO(ABO3??)n (3) AM2Cu3O7?? (4) Bi4V2(1?x)Me2xO11?3x, (5) A?B?O3 where B? is W or Mo; (6) A2B2O7??, (7) and combinations thereof, wherein: A is a cation of atoms having atomic numbers ranging from 57-71, inclusive, a cation of yttrium, cations of Groups 1 and 2 atoms, and combination thereof; B is a cation of a d-block transition metal; A? is a cation of Na or Li; M is a metal cation selected from cations of Group 2 atoms; Me is a metal cation of Cu, Bi, and Co atoms; x ranges from 0.01 to 1.00; and ? ranges from 0.05 to 0.30. The compounds (1)-(7) may function as active supports for binary metal oxides to enhance the oxygen sorption/desorption capacity of the composites.

Abstract: Compositions and methods useful for oxygen sorption and other uses are presented, the compositions A composite material comprising components (A) and (B), wherein component (A) is selected from crystalline ceramic materials capable of forming a stable, reversible perovskite crystal phase at elevated temperatures (T>500° C.), and combinations thereof, and component (B) comprises a metal selected from rhodium (Rh), platinum (Pt), palladium (Pd), nickel (Ni) and silver (Ag), and combinations and alloys of these metals.

Abstract: It is the object of the present invention to provide a catalyst for the selective decomposition of N2O in a mixture of nitrous gases which is adapted to be applied in a temperature range of from 700° C. to at least 1000° C. without any impairment of the catalyst activities. This object is achieved by a catalyst consisting of a porous ceramic support material and a catalytic active phase, wherein said support material consists of at least 95 percent by weight of one or a plurality of alkaline earth compound/s. The catalyst according this invention is preferably used in the production of nitric acid.