Barrier discharge conversion of SO2 and NOx to acids
October 9, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3745751 3856476 Process for utilizing collected material removed from effluent gas Method for removing sulfur dioxide from a gas stream Method for corona discharge enhanced flue gas clean-up Combined electrostatic precipitator and acidic gas removal system Removal of nitric oxide from waste gases and recovery as nitric acid Process and apparatus for electrostatic purification of dust- and pollutant-containing exhaust gases in multiple-field precipitators NOx reduction by sulfur tolerant coronal-catalytic apparatus and method Pulse method for sulfur dioxide electrolysis InventorsAssigneeApplicationNo. 948268 filed on 10/09/1997US Classes:423/210, MODIFYING OR REMOVING COMPONENT OF NORMALLY GASEOUS MIXTURE204/157.3, Removing a component from normally gaseous mixture204/174, Sulfur-oxygen compounds204/177, Nitrogen compounds423/235, Nitrogen or nitrogenous component423/243.01, Utilizing aqueous reactant to remove or modify sulfur or sulfur containing component423/393, Utilizing nitrogen oxide as reactant423/522Sulfuric acidExaminersPrimary: Bos, StevenAssistant: DiMauro, Peter Attorney, Agent or FirmInternational ClassesC25B 001/22B01D 053/60 B01D 053/64 AbstractA process and apparatus for reducing particulate, nitrogen oxides ("NOx"), sulfur dioxide ("SO2 "), and mercury ("Hg") emissions from the combustion exhaust of fossil fuel fired plants while producing an end product that is commercially useful, comprising the steps of oxidizing Hg, NOx and SO2 using a barrier, pulse, corona, or electron beam electrical discharge apparatus to produce HgO and the acids HNO3 and H2 SO4, collecting the HgO, acids and particulates in a wet ESP, and separating the particulates from the collected acid mixture, then separating and concentrated the acids for industrial use.Other References
Field of SearchMODIFYING OR REMOVING COMPONENT OF NORMALLY GASEOUS MIXTURENitrogen or nitrogenous component Utilizing nitrogen oxide as reactant Sulfuric acid Sulfur or sulfur containing component Utilizing aqueous reactant to remove or modify sulfur or sulfur containing component Removing a component from normally gaseous mixture Nitrogen containing product produced Sulfur containing product produced Sulfur-oxygen compounds Nitrogen compounds |
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