Abstract: Disclosed is a method for preparing a zeolite-based catalyst for application on a substrate. The method consists of the steps of: preparing a chemical composition comprising tin oxide, zirconium oxide, cerium oxide, and lanthanum oxide; combining the composition with a catalyst comprising a two-phase hydrocarbon NOx reduction catalyst comprising one or more transition metals supported on a molecular sieve with a coating of one or more stabilizing oxides; and applying the resulting catalyst material to a substrate. The ratio of the catalyst to chemical composition may vary from greater than 1 to 1 to less than 50 to 1. A washcoat may be prepared using the chemical composition, which washcoat is then combined with the catalyst. The washcoat may be combined with the zeolite catalyst using high power density mixing. The resulting catalyst material will then be applied to the substrate.

Abstract: An apparatus for removing soot from diesel engine exhaust streams at temperatures below 150° C. is provided. Although the use of particulate filters for removing carbonaceous soot from such exhaust streams is known, such systems are either active or operate under high temperatures, i.e. in excess of 300° C. The claimed apparatus includes a flow through support device composed of ceramic, such as cordierite or silicon carbide, or a primarily nonferrous metal or stainless steel and coated with an oxide formation comprising hematite and bixbyite in a ratio from 1:1 to 9:1. The claimed apparatus can also include a diesel particulate filter coated with a coating comprising tin, aluminum and zirconium oxides prepared by a co-precipitation process and thereafter coated with platinum or other precious metal.

Abstract: In setting tighter emissions standards for nitrogen oxides, legislative bodies limit the amount of nitrogen dioxide (NO2) permitted in exhaust. The disclosed catalysts can be coated on a support device in a diesel engine exhaust system to increase the reduction of NO2 to nitric oxide (NO). The disclosed coating comprises titanium dioxide, preferably in the form of rutile, comprising approximately 94% titanium dioxide and also comprising zirconium dioxide, silicon dioxide, iron(III) oxide, chromium oxide, vanadium oxide and aluminum oxide. In certain embodiments, a second coating comprised of palladium may be placed over the first coating of titanium dioxide or rutile.

Abstract: An apparatus for removing soot from diesel engine exhaust streams at temperatures below 150° C. is provided. Although the use of particulate filters for removing carbonaceous soot from such exhaust streams is known, such systems are either active or operate under high temperatures, i.e. in excess of 300° C. The claimed apparatus includes a flow through support device composed of ceramic, such as cordierite or silicon carbide, or a primarily nonferrous metal or stainless steel and coated with an oxide formation comprising hematite and bixbyite in a ratio from 1:1 to 9:1. The claimed apparatus can also include a diesel particulate filter coated with a coating comprising tin, aluminum and zirconium oxides prepared by a co-precipitation process and thereafter coated with platinum or other precious metal.