| abstract |
A catalyst for neutralizing vapors and aerosols of organic compounds, carbon monoxide, and a variety of other oxidizable materials from an exhaust which contains oxygen. The catalyst has a carrier made either from titanium dioxide and aluminum oxide or from magnesium-aluminum spinel modified with titanium dioxide. The catalyst has a surface film of active components which include copper oxide and copper chromite (or their nickel or cobalt analog) chemically integrated into the carrier surface by Cu-o-Ti and Cr-O-Ti chains (or their nickel or cobalt analog). The catalyst should comprise from about 0.1% to about 15% by weight of copper oxide (CuO), chromium oxide (Cr2O3), or mixtures of those compounds; from about 5% to about 25% by weight of copper chromite (CuCr2O4); from about 3% to about 25% by weight titanium dioxide (TiO2); and from about 60% to about 90% by weight of aluminum oxide (Al2O3), magnesium/aluminum spinel (MgAl2O4), or mixtures of those compounds. Some or all of the copper ingredients can optionally be replaced with the corresponding nickel or cobalt compounds or mixtures thereof. A method of catalytically treating the impurities of exhausts with the present catalysts (particularly organic compounds), and thus converting them into carbon dioxide and water, is disclosed. |