Katalysator zur Entfernung von Stickoxiden

A catalyst for removing nitrogen oxides whose activity deterioration due to volatile poisons contained in exhaust gases is prevented and which has a superior endurance, and a process for producing the catalyst are provided, which catalyst comprises a titania having a surface area of 20 m2/g or less...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	AKAMA, HIROSHI, KURE, HIROSHIMA, JP, MATSUDA, TOSHIAKI, KURE, HIROSHIMA, JP, TESHIMA, NOBUE, KURE, HIROSHIMA, JP, ITO, MEIJI, KURE, HIROSHIMA, JP, KAMIGUCHI, TAIJI, KURE, HIROSHIMA, JP, KATO, YASUYOSHI, KURE, HIROSHIMA, JP, KONISHI, KUNIHIKO, KURE, HIROSHIMA, JP
Format:	Patent
Sprache:	ger
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	A catalyst for removing nitrogen oxides whose activity deterioration due to volatile poisons contained in exhaust gases is prevented and which has a superior endurance, and a process for producing the catalyst are provided, which catalyst comprises a titania having a surface area of 20 m2/g or less and a zeolite having 0.01 to 20% by weight of copper supported thereon; having an average pore diameter of 10 ANGSTROM or less; and having a silica/alumina molar ratio of 10 or more, and which process comprises mixing powder of the zeolite with the titania or its precursor, followed by molding the mixture into a predetermined shape, followed by calcining the resulting material at 800 DEG C. or higher.