초록 ▼

An oxygen storing material with high thermal stability is disclosed which contains cerium oxide and at least one stabilizer from the group praseodymium oxide, lanthanum oxide, yttrium oxide and neodymium oxide, wherein the stabilizer(s) and optionally cerium oxide are present in highly dispersed for

An oxygen storing material with high thermal stability is disclosed which contains cerium oxide and at least one stabilizer from the group praseodymium oxide, lanthanum oxide, yttrium oxide and neodymium oxide, wherein the stabilizer(s) and optionally cerium oxide are present in highly dispersed form on the specific surface area of a high surface area support material from the group aluminum oxide, zirconium oxide, titanium oxide, silicon dioxide, cerium oxide and mixed oxides thereof and the oxygen storing material still has a specific surface area of more than 20, preferably more than 30 m2/g, after calcination in air at 900° C. for a period of 10 hours.

대표청구항 ▼

An oxygen storing material with high thermal stability is disclosed which contains cerium oxide and at least one stabilizer from the group praseodymium oxide, lanthanum oxide, yttrium oxide and neodymium oxide, wherein the stabilizer(s) and optionally cerium oxide are present in highly dispersed for

An oxygen storing material with high thermal stability is disclosed which contains cerium oxide and at least one stabilizer from the group praseodymium oxide, lanthanum oxide, yttrium oxide and neodymium oxide, wherein the stabilizer(s) and optionally cerium oxide are present in highly dispersed form on the specific surface area of a high surface area support material from the group aluminum oxide, zirconium oxide, titanium oxide, silicon dioxide, cerium oxide and mixed oxides thereof and the oxygen storing material still has a specific surface area of more than 20, preferably more than 30 m2/g, after calcination in air at 900° C. for a period of 10 hours. 10. The reformer according to claim 9, wherein said one or more catalyst components contain a heat-resistant oxide and at least one metal element selected from the group consisting of those of groups VB to VIII, IB and IIB of the long-form periodic table. 11. The reformer according to claim 10, wherein said at least one metal element is at least one of those selected from the group consisting of metal elements of group VIII, V, Cr, Mo, W, Re, metal elements of group IB, and Zn. 12. The reformer according to claim 10, wherein said heat-resistant oxide is selected from the group consisting of Al2O3,SiO2,TiO2,ZrO2,MgO, zeolite, SAPO, ALPO, a layer structure compound and a compound oxide thereof. 13. The reformer according to claim 1, wherein one of said two or more catalyst units disposed at the most upstream position is positioned just after and downstream from said inlet for a feed reactant fluid whereby the catalyst treats only said feed reactant fluid. 14. A reformer for generating hydrogen from a reactant fluid containing an organic compound or carbon monoxide disposed in the flow path of a reactant fluid wherein the reactant fluid flows from an upstream position to a downstream position, said reformer comprising a reactant fluid supply means for supplying a hydrogen generating reactant fluid containing an organic compound or carbon monoxide, an inlet connected to said reactant fluid supply means for feeding said reactant fluid to said reformer, two or more catalyst units of a honeycomb structure in series in the reformer for generating hydrogen from the reactant fluid containing an organic compound or carbon monoxide, by catalysis, and an outlet for a reformed gas containing hydrogen downstream of the catalyst units , wherein at least two of said two or more catalyst units satisfy the following relationship: Cell density of the upstream-side catalyst unit