Patents by Inventor Dong-Sup Doh

Dong-Sup Doh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for removing nitrogen oxides using natural manganese ores
    Patent number: 6641790
    Abstract: There is disclosed a method for removing nitrogen oxides of exhaust gas using natural manganese ores. In the method, ammonia is used as a reductant to selectively reduce the nitrogen oxides in the presence of a catalyst prepared from the natural manganese ores. The catalyst allows nitrogen oxides to be completely removed from exhaust gas at a relatively low temperature of 130-250° C. without discharging unreacted ammonia through oxidation reaction. The catalyst is superior in economic terms in addition to preventing the deleterious effects which occur when discharging ammonia.
    Type: Grant
    Filed: September 6, 2001
    Date of Patent: November 4, 2003
    Assignee: Korea Power Enginering Company
    Inventors: Sung-Ho Hong, Hyun-Young Chang, Seok-Joo Hong, Dong-Won Kim, Sung-Chang Hong, Tae-Sung Park, Dong-Sup Doh, Soon-Kwan Jung
  • Method for removing nitrogen oxides using natural manganese ores
    Publication number: 20020155049
    Abstract: There is disclosed a method for removing nitrogen oxides of exhaust gas using natural manganese ores. In the method, ammonia is used as a reductant to selectively reduce the nitrogen oxides in the presence of a catalyst prepared from the natural manganese ores. The catalyst allows nitrogen oxides to be completely removed from exhaust gas at a relatively low temperature of 130-250° C. without discharging unreacted ammonia through oxidation reaction. The catalyst is superior in economic terms in addition to preventing the deleterious effects which occur when discharging ammonia.
    Type: Application
    Filed: September 6, 2001
    Publication date: October 24, 2002
    Inventors: Sung-Ho Hong, Hyun-Young Chang, Seok-Joo Hong, Dong-Won Kim, Sung-Chang Hong, Tae-Sung Park, Dong-Sup Doh, Soon-Kwan Jung