Gm Global Technolgoy Operations, Inc.

The Administrators of the Tulane Educational Fund

John T Johnson

Kenneth B Gross

Daniel Dziedzic

Wei Ping Li

Gongshin Qi

Mei Cai

Michael P Balogh

Yunfeng Lu

Belabbes Merzougui

Se Hyuck Oh

Frederick T Wagner

Martin S Ruthkosky

Swathy Swathirajan

Gregory Charles Garabedian

Lee Lizhong Feng

Jon C Halalay

Zhiwang Wu

Robert A Gorski

The present technology relates to perovskite materials for oxygen storage. In one aspect, the perovskite material includes at least one platinum group metal (PGM) and at least one perovskite compound selected from the group consisting of formula (a): LaMOand formula (b): LaSrMO, wherein: M is selected from the group consisting of Co, Cu, Fe, Mn and Ni; x is about 0.7 to about 1.1; and y is 0 to about 0.8, and wherein M, x, and y are independently variable for each one of said perovskite compounds. In one exemplary method, the perovskite materials of the technology are employed to treat automotive exhaust gas. In one embodiment, the perovskite materials are included in the washcoat of an automotive catalytic converter.

Perovskite based oxygen storage materials

An exhaust aftertreatment system for purifying exhaust gases from a compression-ignition engine includes a first exhaust aftertreatment device including an oxidation catalyst and a particulate filter element fluidly coupled to an exhaust outlet of the engine. A second exhaust aftertreatment device includes an ammonia-selective catalytic reduction catalyst fluidly coupled to a downstream outlet of the first exhaust aftertreatment device. A reductant injection system is configured to inject urea reductant into the exhaust gas feedstream between the first exhaust aftertreatment device and the second exhaust aftertreatment device.

Exhaust aftertreatment system for a compression-ignition engine

An electrocatalyst for fuel cell applications includes a catalyst support and a noble metal or noble metal-based alloy catalyst supported upon the catalyst support. The catalyst support characteristically includes a Group IV-VI transition metal silicide with or without the mixing of carbon. A fuel cell incorporating the electrocatalyst into the anode and/or cathode is disclosed. Such fuel cell exhibit improved cycling and operating performance.

Supports for fuel cell catalysts based on transition metal silicides

An immobilized protein catalyst is prepared by applying an adhesive to a polymeric support, applying a layer of a globular protein over the layer of adhesive, binding a crosslinking agent to the protein layer, and binding the protein catalyst by reaction with the crosslinking agent.

Process for immobilization of protein catalysts, product, and use

Titanium oxide (usually titanium dioxide) catalyst support particles are doped for electronic conductivity and formed with surface area-enhancing pores for use, for example, in electro-catalyzed electrodes on proton exchange membrane electrodes in hydrogen/oxygen fuel cells. Suitable compounds of titanium and a dopant are dispersed with pore-forming particles in a liquid medium. The compounds are deposited as a precipitate or sol on the pore-forming particles and heated to transform the deposit into crystals of dopant-containing titanium dioxide. If the heating has not decomposed the pore-forming particles, they are chemically removed from the, now pore-enhanced, the titanium dioxide particles.

Making electrocatalyst supports for fuel cells

Ozone and, if necessary, water is added to an exhaust gas, such as air, containing hydrogen- and carbon-containing molecules of a pollutant. The exhaust gas is then continually flowed into one or more oxidizing reaction chamber modules. In the reaction chamber(s) the ozone- and water-containing gas is subjected to intense ultraviolet radiation (wavelength of 254 nm) to promote the formation of hydroxyl radicals to oxidize the pollutant molecules to carbon dioxide and water. The continually discharged gas is analyzed for residual ozone and hydrocarbon content and the analytical data used in feedback control of ozone addition and UV radiation intensity.

Destruction of hydrocarbon emissions

A fluidized-bed reactor comprising a chamber defining a hollow interior region and having a lower surface; a first input for introducing a contaminated gas into the hollow interior region; a plurality of catalyst nanoparticles within the hollow interior region and located on the lower surface, and a fluidizing input for introducing a fluidizing material into the hollow interior region, said fluidizing input having an outlet directed at the lower surface of the chamber, wherein the introduction of the fluidizing material directed at the lower surface fluidizes at least a portion of the catalyst nanoparticles located on the lower surface to create a gaseous dispersion of catalyst nanoparticles that reacts with the contaminated gas to produce a decontaminated gas.

Fluidized-bed reactor system

A process for selectively removing carbon dioxide from a gaseous stream by converting the carbon dioxide to a solid, stable form is provided. In a sequestration process, carbon dioxide enriched air is passed through a gas diffusion membrane to transfer the carbon dioxide to a fluid medium. The carbon dioxide rich fluid is then passed through a matrix containing a catalyst specific for carbon dioxide, which accelerates the conversion of the carbon dioxide to carbonic acid. In the final step, a mineral ion is added to the reaction so that a precipitate of carbonate salt is formed. This solid mineral precipitate can be safely stored for extended periods of time, such as by burying the precipitate in the ground or depositing the precipitate into storage sites either on land or into a body of water. An apparatus for removing carbon dioxide from a gaseous stream is also provided.

Growing community of inventors

Sterling Heights, MI, United States of America

John T Johnson