초록 ▼

An arsenic-resistant composite oxide catalyst containing oxides of at least the metals vanadium and molybdenum, in particular for reducing nitrogen oxides in flue gases in the presence of a reducing agent, such as ammonia or carbon monoxide, includes at least one composite oxide phase with a general

An arsenic-resistant composite oxide catalyst containing oxides of at least the metals vanadium and molybdenum, in particular for reducing nitrogen oxides in flue gases in the presence of a reducing agent, such as ammonia or carbon monoxide, includes at least one composite oxide phase with a general formula VxMoyO32, where x+y≤12 and where x≥1 and y≥1, and optionally a MoO3 phase. A method for producing an arsenic-resistant composite oxide catalyst includes mixing vanadium oxide and molybdenum oxide or a precursor thereof with one another to form a mixture, heating the mixture to a temperature at which a mixture of oxides is present, preferably in completely molten form, then cooling down the mixture to form at least one composite oxide phase with a general formula VxMoyO32, and then subjecting the composite oxide phase to a reducing treatment to prepare a lower-oxygen composite oxide phase with the same structure.

대표청구항 ▼

An arsenic-resistant catalyst, comprising at least the metals vanadium and molybdenum in an oxygen lattice, having at least one relatively lower-oxygen phase obtained by reduction-treating of a relatively higher-oxygen phase of a general formula VxMoyO32 in a given structure, where x+y≤12 and where

An arsenic-resistant catalyst, comprising at least the metals vanadium and molybdenum in an oxygen lattice, having at least one relatively lower-oxygen phase obtained by reduction-treating of a relatively higher-oxygen phase of a general formula VxMoyO32 in a given structure, where x+y≤12 and where x≥1 and y≥1, and a partly reduced molybdenum oxide phase, wherein said relatively lower-oxygen phase has said given structure.