Title:
PHOSPHORIC ACID-BASED COMPOSITION AND CATALYST FOR REDUCTION CRACKING OF NOX USING THIS COMPOSITION
Document Type and Number:
Japanese Patent JP3152681
Kind Code:
B2
Abstract:
PURPOSE: To provide the novel compsn. suitable for the catalyst which can make reduction cracking of NOx in gases having a high oxygen content.
CONSTITUTION: This compsn. consists of a multi-component oxide contg. metal elements M which have bivalent valency and can attain univalent or trivalent valency (for example, Cu, Fe, Co, Ni), bivalent or trivalent metal elements M' (for example, Ca, Y, Er, Yb), Zr, P, and Si. The entire compsn. satisfies MaM'bZr4P6-xSiyO24-z (where 0<a≤1.0, 0≤b<1.0, a=1-(valency of M')×b/2, 0<x≤1.0. 0<y≤1.0). The catalyst powder is obtd. by weighing the oxides and compds. of the respective elements, then treating the oxide and compds. at 700 to 1400°C.
Inventors:
Masanobu Ishida
Application Number:
JP17644791A
Publication Date:
April 03, 2001
Filing Date:
July 17, 1991
Export Citation:
Assignee:
Kyocera Corporation
International Classes:
B01J27/182; C01B33/20; C04B35/00; C04B35/447; B01D53/94; C04B35/48; (IPC1-7): C01B33/20; B01D53/94; B01J27/182; C04B35/447