Resources Contact Us Home
Metal/metal oxide doped oxide catalysts having high deNOx selectivity for lean NOx exhaust aftertreatment systems

Image Number 3 for United States Patent #6706660.

A lean NOx catalyst and method of preparing the same is disclosed. The lean NOx catalyst includes a ceramic substrate, an oxide support material, preferably .gamma.-alumina, deposited on the substrate and a metal promoter or dopant introduced into the oxide support material. The metal promoters or dopants are selected from the group consisting of indium, gallium, tin, silver, germanium, gold, nickel, cobalt, copper, iron, manganese, molybdenum, chromium, cerium, vanadium, oxides thereof, and combinations thereof. The .gamma.-alumina preferably has a pore volume of from about 0.5 to about 2.0 cc/g; a surface area of between about 80 to 350 m.sup.2 /g; an average pore size diameter of between about 3 to 30 nm; and an impurity level of less than or equal to 0.2 weight percent. In a preferred embodiment the .gamma.-alumina is prepared by a sol-gel method, with the metal doping of the .gamma.-alumina preferably accomplished using an incipient wetness impregnation technique.

  Recently Added Patents
Method and/or apparatus for navigating mobile robot using virtual sensor
Light-emitting element, light-emitting device, and electronic device
Anomalous data detection method
Information processing apparatus, information outputting method and computer program storage device
Means to securely fixate pacing leads and/or sensors in vessels
Methods and systems for automatically identifying a logical circuit failure in a data network
Display device and projector
  Randomly Featured Patents
Video tape recorder with particular format chrominance and luminance information
High frequency vertical spring probe
Layout technique for C3MOS inductive broadbanding
Process and apparatus for managing use of a peripheral bus among a plurality of controllers
Hard disk drive medical monitor with security encryption
Retrovirus from the HIV group and its use
Paw-shaped pet bed
Method for secure communication between two devices
Method for solving intermission of streaming data and associated device thereof
Smart skin array woven fiber optic ribbon and arrays and packaging thereof