A cerium-zirconium-aluminum-based composite material, a cGPF catalyst and a preparation method thereof are provided. The cerium-zirconium-aluminum-based composite material adopts a stepwise precipitation method, firstly preparing an aluminum-based pre-treated material, then coprecipitating the aluminum-based pre-treated material with zirconium and cerium sol, and finally roasting at high temperature to obtain the cerium-zirconium-aluminum-based composite material. The cerium-zirconium-aluminum-based composite material has better compactness and higher density, and when it is used in cGPF catalyst, it occupies a smaller volume of pores on the catalyst carrier, such that cGPF catalyst has lower back pressure and better ash accumulation resistance, which is beneficial to large-scale application of cGPF catalyst.

A three-way catalyst article, and its use in an exhaust system for internal combustion engines, is disclosed. The catalyst article for treating exhaust gas comprising: a substrate comprising an inlet end and an outlet end with an axial length L, a first catalytic region comprising a first platinum group metal (PGM) component and a first metal component, wherein the first PGM component comprises platinum, palladium, or a combination thereof; wherein the first metal component is Mn, Mg, Fe, Cu, Zn, or a combination thereof; and wherein the molar ratio between the first metal component and the first PGM component in the first catalytic region is from 120:1 to 1:5.

The invention discloses use of a catalyzed particulate filter loaded with a silver-zirconia catalyst prepared by citric acid-assisted sol-gel method for soot removal from engine exhaust. The invention discloses a method of making xAg/ZrO.sub.2 where x is 20 mol %, said method comprises: mixing aqueous solutions of AgNO.sub.3 and ZrO(NO.sub.3).sub.2 hydrate to produce a first mixture, adding an aqueous solution of citric acid to the first mixture, wherein the molar ratio of metal ions to citric acid is about 1:3 to produce a second mixture; heating the second mixture to about 80-90 C. to evaporate excess water in the second mixture to form a viscous gel, charring the viscous gel at about 200 C. for about 12 hours to produce a foam-like material, grounding the foam-like material to form a grounded material, and calcinating the grounded material at 500 C. for about 10 hours.

The present invention relates to a particulate filter, which comprises a substrate, comprising a plurality of porous walls extending longitudinally to form a plurality of parallel channels extending from an inlet end to an outlet end, wherein a quantity of the channels are inlet channels that are open at the inlet end and closed at the outlet end, and a quantity of channels are outlet channels that are closed at the inlet end and open at the outlet end; and a layer of inorganic particles loaded on surfaces of the porous walls in the inlet channels and/or outlet channels, preferably in at least the inlet channels, wherein the inorganic particles have a D.sub.90 in the range of 5.0 to 14.0 microns.

A refrigerator includes a cabinet coupled to one or more doors forming a storage compartment and an air purifying duct system positioned in the storage compartment. The air purifying duct system includes an air duct in fluid communication with the storage compartment; a fan configured to circulate air between the storage compartment and air duct; a photocatalyst disposed on a portion of the interior surface; one or more LEDs positioned to project light across the air duct and onto the photocatalyst; and an air circulation path configured to direct pathogens within the storage compartment into the air duct using the fan and circulate purified air into the storage compartment.

An exhaust gas purification filter is used so as to support a NO.sub.X purification catalyst. The exhaust gas purification filter includes a honeycomb structure portion and a plug portion. The honeycomb structure portion includes a partition wall and cells. Numerous pores are formed in the partition wall. The cells are partitioned by the partition walls and form a flow path for an exhaust gas. The plug portion alternately seals an inflow end surface or an outflow end surface for the exhaust gas in the cells. The partition wall has a gas permeability coefficient that is equal to or greater than 0.3510.sup.12 m.sup.2, a pore volume ratio of pore diameters of 9 m or less that is equal to or less than 25%, and an average pore diameter that is equal to or greater than 12 m.

A three-way catalyst article, and its use in an exhaust system for internal combustion engines, is disclosed. The catalyst article for treating exhaust gas comprising: a substrate comprising an inlet end and an outlet end with an axial length L; and a first catalytic region on the substrate; wherein the first catalytic region comprises a first PGM component and a first alumina, wherein the first alumina is doped with a first dopant of at least 5 wt. %, and wherein the first dopant is selected from the group consisting of Zr, Ta, Mo, W, Ti, Nb, and a combination thereof.

CeO.sub.2 nanoparticles having a copper domain disposed on at least a portion of the nanoparticle. The material can catalyze a nitrogen oxide decomposition, such as a deN.sub.xO.sub.y reaction. Methods of making and using the material are also provided.

Close-coupled catalysts (CCC) for TWC applications are disclosed. The novel CCCs are implemented using light-weighted ceramic substrates in which a thin coating employing a low loading of Iron (Fe)-activated Rhodium (Rh) material composition, with Iron loadings and an OSM of Ceria-Zirconia, are deposited onto the substrates. Different CCC samples are produced to determine and/or verify improved light-off (LO) and NO.sub.X conversion of the CCCs. Other CCC samples produced are a CCC including a standard (non-activated) Rh thin coating and a heavily loaded CCC with a single coating of Pd/Rh material composition. The CCC samples are aged under dyno-aging using the multi-mode aging cycle and their performance tested using a car engine with ports on the exhaust to measure the emissions, according to the testing protocol in the Environmental Protection Agency Federal Test Procedure 75. During testing, the thin coatings of Fe-activated Rh exhibit improved light-off and NO.sub.x conversion efficiency.

Embodiments described herein generally relate to apparatus and methods for reducing CO.sub.2 from flue gas. Methods may include performing a chemisorption process in a first reactor comprising using at least a chemisorption solution comprising a sorbent. Methods may also include performing a desorption process treating the chemisorption solution with a powdered desorption catalyst after the chemisorption process has been performed.