Patents Assigned to Powerspan Corp.
  • Sulfur dioxide removal using ammonia
    Publication number: 20030108469
    Abstract: A process and apparatus for removing SO2 from a gas stream having the steps of scrubbing the SO2 with an ammonia scrubbing solution and removing any aerosols generated by the scrubbing in a wet electrostatic precipitator. Ammonium sulfate, a valuable fertilizer, can be withdrawn from the scrubbing solution.
    Type: Application
    Filed: January 31, 2002
    Publication date: June 12, 2003
    Applicant: Powerspan Corp.
    Inventors: Francis R. Alix, Joanna L. Duncan, Christopher R. McLarnon
  • Barrier discharge conversion of SO.sub.2 and NOx to acids
    Patent number: 6132692
    Abstract: A process for reducing particulate, Hg, NOx, and SO.sub.2 emissions from the combustion of fossil fuel while providing the capability of producing an end product that is commercially useful comprising the steps of oxidizing Hg, NOx and SO.sub.2 using a barrier discharge reactor to produce the HgO and acids HNO.sub.3 and H.sub.2 SO.sub.4, collecting the HgO, acids and particulates in a wet ESP, and then draining them from the wet ESP to remove them from the flue gas stream.
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: October 17, 2000
    Assignee: Powerspan Corp.
    Inventors: Francis R. Alix, S. Edward Neister, Christopher R. McLarnon, Phillip D. Boyle