Patents Assigned to University of North Dakota Energy and Environmental Research Center Foundation
  • Leonardite char adsorbents
    Patent number: 5405593
    Abstract: A method of removing polluting noxious substances from a flow of flue-gas including sulfur dioxide, nitric oxides and heavy metals is disclosed. The method consists of passing the flue-gas material through sized-reduced leonardite to assure that it will have a high display of adsorption capacities. The Leonardite is superior to commercially available carbonized char products such as activated carbon, as well as the traditional lignite coke material.
    Type: Grant
    Filed: July 2, 1993
    Date of Patent: April 11, 1995
    Assignee: University of North Dakota Energy and Environmental Research Center Foundation
    Inventor: Curtis L. Knudson