Patent ID: 6458741
Filing Date: 2002-10-01
Classification: A62D,B01J,C01B

Abstract:
A catalyst composition for destruction of VOCs in a gas comprising one or more first metals selected from the group consisting of Ce and Zr and at least one of:(a) one or more second metals selected from the group consisting of: Gd, La, Sr and Sc; or (b) one or more third metals selected from the group consisting of: Ti, V, Mn, Fe, Co, Cr, Ni, Au, Ag and Cu; and optionally (c) one or more fourth metals selected from the group consisting of: Pt, Pd, Rh, Ru, Re, Os and Ir with the formula: nN/Cetâˆ’xZrcAaAâ€²aâ€²Aâ€³aâ€³BbBâ€²bâ€²Bâ€³bâ€³O2âˆ’&dgr;â€ƒwherein n is a percentage from 0 to 25; N is selected from the group consisting of fourth metals and mixtures thereof; x=a+aâ€²+aâ€³+b+bâ€²+bâ€³+c; a, aâ€², aâ€³, b, bâ€², bâ€³ and c are each, independently of one another, 0 to 0.9; &dgr; is a number which renders the composition charge neutral; A, Aâ€² and Aâ€³ are independently selected from the group consisting of second metals; B, Bâ€² and Bâ€³ are independently selected from the group consisting of third metals; and provided that when n is zero, at least one of a, aâ€², aâ€³, b, bâ€², bâ€³ or c is nonzero.