Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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 apparatus for modeling computer program behaviour for behavioural detection of malicious program
Controlling a video window position relative to a video camera position
Method and device for monitoring and analyzing signals
Note tab
Monitoring heap in real-time by a mobile agent to assess performance of virtual machine
Aspect ratio enhancement
Etching method, etching apparatus, and computer-readable recording medium
  Randomly Featured Patents
Tubular Heating element with elastic electrode
Integrated circuit with a measuring circuit and method of configuring an integrated circuit with a measuring circuit
Laser beam target
Apparatus for storing a variable quantity of moving strand material
Pushbutton tuner
Memory controller, nonvolatile storage system, and data management method
Drained face seal
Method and apparatus for I/O resonance compensation
Antenna layout for contactless data card
Apparatus for manufacturing coil spring