A catalyst support comprising samarium, zirconium and aluminum is disclosed. The catalyst support may have a general formula of Sm.sub.2xZr.sub.xAl.sub.2xO.sub.4, in which x is a molar ratio that may be between 0.3 and 0.6.

The present invention relates to a process for producing mixed oxide catalysts on the basis of molybdenum and bismuth oxides in which the precursor compounds of the components of mixed oxide catalysts provided in the form of a solution and/or suspension are subjected to a spray-drying with a specific temperature regime and the spray particles obtained in this way are then calcined to yield a catalytic active mass, and to the mixed oxide catalysts obtainable by this process and to the use of these catalysts in the partial oxidation of olefms, in particular in the partial gas phase oxidation of propene to acrolein and acrylic acid. The spray drying of the precursor compounds containing solution or suspension is performed in concurrent with a gas stream having a specific entrance temperature. Alternatively, when the main gas stream has a higher entrance temperature, an additional colder gas stream can be fed in downstream. The thus obtained mixed oxide catalysts give lower a maximum temperature in the hot spot of catalyst fixed bed when they are used in the partial gas phase oxidation of olefms.

The present invention relates to a process for producing mixed oxide catalysts on the basis of molybdenum and bismuth oxides in which the precursor compounds of the components of mixed oxide catalysts provided in the form of a solution and/or suspension are subjected to a spray-drying with a specific temperature regime and the spray particles obtained in this way are then calcined to yield a catalytic active mass, and to the mixed oxide catalysts obtainable by this process and to the use of these catalysts in the partial oxidation of olefms, in particular in the partial gas phase oxidation of propene to acrolein and acrylic acid. The spray drying of the precursor compounds containing solution or suspension is performed in concurrent with a gas stream having a specific entrance temperature. Alternatively, when the main gas stream has a higher entrance temperature, an additional colder gas stream can be fed in downstream. The thus obtained mixed oxide catalysts give lower a maximum temperature in the hot spot of catalyst fixed bed when they are used in the partial gas phase oxidation of olefms.

A fuel synthesis catalyst of an embodiment for hydrogenating a gas includes at least one selected from the group consisting of; carbon dioxide and carbon monoxide, the catalyst comprising, an oxide base material containing at least one oxide selected from the group consisting of; Al.sub.2O.sub.3, MgO, TiO.sub.2, and SiO.sub.2, first metal particles containing at least one metal selected from the group consisting of; Ni, Co, Fe, and Cu and brought into contact with the oxide base material, and a porous oxide layer containing at least one selected from the group consisting of; CeO.sub.2, ZrO.sub.2, TiO.sub.2, and SiO.sub.2 and having an interface with each of the first metal particles and the oxide base material.

A fuel synthesis catalyst of an embodiment for hydrogenating a gas includes at least one selected from the group consisting of; carbon dioxide and carbon monoxide, the catalyst comprising, an oxide base material containing at least one oxide selected from the group consisting of; Al.sub.2O.sub.3, MgO, TiO.sub.2, and SiO.sub.2, first metal particles containing at least one metal selected from the group consisting of; Ni, Co, Fe, and Cu and brought into contact with the oxide base material, and a porous oxide layer containing at least one selected from the group consisting of; CeO.sub.2, ZrO.sub.2, TiO.sub.2, and SiO.sub.2 and having an interface with each of the first metal particles and the oxide base material.

The present invention provides an additive composition having the general formula: A.sub.xB.sub.yC(.sub.1-y)D.sub.zO.sub.m wherein: A is one or more metal elements selected from the group consisting of Group IIA of the periodic table; B, C is one or more metal elements selected from the lanthanide group, series of the periodic table or Yttrium; D is one or more metal elements selected from the group consisting of Manganese, Cobalt, Copper, Nickel or Ruthenium; x is a number defined by 0.5<x<4; y is a number defined by 0<=y<=1; z is a number defined by 2<z<6; m is a number which renders the catalyst substantially neutral. The present invention also provides a process for preparing the afore-mentioned additive composition. The present invention further provides mixed metal oxide catalysts comprising additive composition and its use in hydrocarbon conversion processes.

The present invention provides an additive composition having the general formula: A.sub.xB.sub.yC(.sub.1-y)D.sub.zO.sub.m wherein: A is one or more metal elements selected from the group consisting of Group IIA of the periodic table; B, C is one or more metal elements selected from the lanthanide group, series of the periodic table or Yttrium; D is one or more metal elements selected from the group consisting of Manganese, Cobalt, Copper, Nickel or Ruthenium; x is a number defined by 0.5<x<4; y is a number defined by 0<=y<=1; z is a number defined by 2<z<6; m is a number which renders the catalyst substantially neutral. The present invention also provides a process for preparing the afore-mentioned additive composition. The present invention further provides mixed metal oxide catalysts comprising additive composition and its use in hydrocarbon conversion processes.

A NO.sub.x adsorber catalyst composition, a NO.sub.x adsorber catalyst and its use in an emission treatment system for internal combustion engines, is disclosed. The NO.sub.x adsorber catalyst composition a support material and one or more platinum group metals disposed on the support material, wherein the support material comprises a mixed dopant NO.sub.x storage enhancer.

A NO.sub.x adsorber catalyst composition, a NO.sub.x adsorber catalyst and its use in an emission treatment system for internal combustion engines, is disclosed. The NO.sub.x adsorber catalyst composition a support material and one or more platinum group metals disposed on the support material, wherein the support material comprises a mixed dopant NO.sub.x storage enhancer.

Provided are a catalyst treatment device and a method of manufacturing the catalyst treatment device. In the catalyst treatment device, the catalyst component can be used in a smaller amount and at a lower cost without need of equipment such as casing, and can suppress excessive pressure loss with adequate voids occurring when the supported catalyst is loaded for use. The catalyst treatment device of the present invention includes a supported catalyst having a corrugated and fragmentary form, wherein the supported catalyst includes a glass paper having a corrugated and fragmentary form, a catalyst activity component supported on the glass paper and having catalytic action, and an inorganic binder necessary to cause the catalyst activity component to be supported on the glass paper and make the glass paper into a corrugated form.