Record Display for the EPA National Library Catalog


Main Title Reduction of nitric oxide with metal sulfides.
Author McCandless, F. P. ; Hodgson, Kent
CORP Author Montana State Univ., Bozeman. Dept. of Chemical Engineering.;Industrial Environmental Research Lab., Research Triangle Park, NC.
Publisher U.S. Environmental Protection Agency,
Year Published 1978
Report Number EPA-600/7-78-213; EPA-R-800682; PB289450
Stock Number PB-289 450
OCLC Number 39044709
Subjects Nitric oxide ; Oxidation-reduction reaction ; Metal sulfides ; Metal sulphides
Additional Subjects Air pollution control ; Nitrogen oxide(NO) ; Inorganic sulfides ; Surface area ; Catalysis ; Reduction reaction ; Feasibility ; Nitrogen oxides ; Iron sulfides ; Absorbers(Materials) ; Thermodynamics ; Laboratory equipment ; Oxygen ; Flue gases ; Combustion products ; Industrial wastes ; Stationary sources ; Strontium sulfides ; Barium sulfides ; Calcium sulfides
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EKBD  EPA-600/7-78-213 Research Triangle Park Library/RTP, NC 12/12/2003
ELBD ARCHIVE EPA 600-7-78-213 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELBD RPS EPA 600-7-78-213 repository copy AWBERC Library/Cincinnati,OH 03/28/2018
ESAD  EPA 600-7-78-213 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-289 450 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 83 pages
The report gives results of research to determine the technical feasibility of using metal sulfide for the chemical reduction of NOx to N2. Nineteen different metal sulfides were investigated, using a test gas of pure NO. Although most sulfides resulted in some NO reduction, BaS, CaS, SrS, and FeS were the most promising. Several catalysts reduced the temperature at which the reduction process proceeds by as much as 200 C. A further temperature reduction was obtained by impregnating the sulfide and catalyst on high surface area supports of activated alumina or molecular sieves. The most promising catalysts were NaF, NiC 12, and FeC 12. All combinations of the most promising sulfide and catalysts were tested for NO reduction, using a synthetic flue gas containing 1000 ppm NO and 1% O2. The capacities of the six best were FeS-FeC 12 > SrS-NaF > CaS-NaF > BaS-FeC 12 > FeS-NiCl > CaS-FeC 12, and ranged from 0.0372 to 0.0134 g NO reduced/g initial sulfide present. Capacities of 0.91 and 0.76 g NO/g sulfide were obtained when using 5% CaS (only) impregnated on alumina and molecular sieves, respectively. It was concluded that these sulfides can reduce NO in the presence of O2, but more research is required to establish the economic feasibility.