Catalysts for low-temperature destruction of volatile organic compounds in air
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United States of America Patent
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Oct 1, 2002
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Dec 20, 1999
filing date -
Dec 20, 1999
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Abstract
Catalyst compositions for destruction of volatile organic carbons (VOCs) in an oxygen-containing gas stream at low temperatures 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; (b) one or more third metals selected from the group consisting of: Ti, V, Mn, Fe, Co, Cr, Ni, Au, Ag and Cu; and (c) one or more fourth metals selected from the group consisting of Pt, Pd, Rh, Ru, Re, Os and Ir are provided. Catalyst compositions provided may be single-phase, mixed-metal oxides, or multi-phase. Catalysts of this invention have improved activity for VOC reduction at low temperatures in gaseous systems.
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