초록 ▼

A combustion catalyst is disclosed which is composed of a durable support containing a plurality of mutually partitioned and independent combustion gas flow paths and an active catalyst formed mainly of palladium and/or palladium oxide and deposited in the form of a coating on the inner wall surface

A combustion catalyst is disclosed which is composed of a durable support containing a plurality of mutually partitioned and independent combustion gas flow paths and an active catalyst formed mainly of palladium and/or palladium oxide and deposited in the form of a coating on the inner wall surfaces of the combustion gas flow paths and characterized in that the deposition of the active catalyst in the form of a coating on all the inner wall surfaces is omitted in part of the whole of the combustion gas flow paths. The mutually partitioned and independent combustion gas flow paths which are provided for the durable support jointly form an aggregate of opening parts in the pattern of gratings and these opening parts have a square, rectangular, triangular, or hexagonal cross section. Thus, the durable support constitutes a so-called honeycomb structure.

대표청구항 ▼

A combustion catalyst, comprising: a honeycomb shaped durable support containing a plurality of mutually partitioned and independent combustion gas flow paths; and an active catalyst comprised mainly of palladium and/or palladium oxide and deposited on inner wall surfaces of a portion of said combus

A combustion catalyst, comprising: a honeycomb shaped durable support containing a plurality of mutually partitioned and independent combustion gas flow paths; and an active catalyst comprised mainly of palladium and/or palladium oxide and deposited on inner wall surfaces of a portion of said combustion gas flow paths; wherein said deposition of said active catalyst is omitted from all the inner wall surfaces of another portion of said combustion gas flow paths so that inner wall surfaces of some of said combustion gas flow paths contain the active catalyst and inner wall surfaces of other gas flow paths are free of the active catalyst. A combustion catalyst according to claim 1, wherein said flow paths are partitioned in a lattice fashion and include openings of square cross-section.