A Study of Nitrous Oxide Decomposition over Calcium Oxide

Dowon Shun; Hyo Sup Chang; Yeong Seong Park; Dal-Hee Bae; Gyoung Tae Jin

Korean Journal of Chemical Engineering, Vol.18, No.5, 630-634, September, 2001

DOI10.1007/BF02706378 Export Citation

A Study of Nitrous Oxide Decomposition over Calcium Oxide

Dowon Shun^†, Hyo Sup Chang¹, Yeong Seong Park¹, Dal-Hee Bae , and Gyoung Tae Jin

Fluidization Technology Research Center, KIER, Daejeon 305-343, Korea
¹Department of Environmental Engineering, Daejeon University, Daejeon 300-716, Korea

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A study of N2O decomposition reaction in a fixed bed a reactor over bed of CaO particles has been conducted. Effects of parameters such as concentration of inlet N2O gas, reacting temperature and content of CO2/CO gas present in the reacting materials on the decomposition reaction have been investigated. The results showed that the conversion of N2O decomposition was accelerated by the increase of reaction temperature, and the existence of CO, while the rate was hindered by the existence of CO2. Heterogeneous gas solid reaction kinetics was proposed for N2O decomposition and compared with homogeneous reaction kinetics.

Keywords:N2O Decomposition;Heterogeneous Kinetics

[References]

Amand LE, Andersson, "Emissions of Nitrous Oxide from Fluidized Bed Boilers," Proceedings of the 10th International Conference on Fluidized Bed Combustion, 1, 49 (1989)
Federal Energy Technology Center U.S. Department of Energy, "Green House Gases" (1999)
Goel S, Morihara A, Tullin CJ, Sarofim AF, "Effect of NO and O2 Concentration on N2O Formation During Coal Combustion in a Fluidized Bed Combustor," 25th Symposium on Combustion, 1051 (1994)
Hiltunen M, Kilpinen P, Hupa M, Lee YY, "N2O Emissions from CFB Boilers," Proceedings of the 11th International Conference on Fluidized Bed Combustion, 1, 687 (1991)
Iisa K, Tullin C, Hupa M, "Simultaneous Sulfation and Recarbonation of Calcined Limestone under PFBC Conditions," Proceedings of the 11th International Conference on Fluidized Bed Combustion, 83 (1991)
Johnsson JE, Dam-Johansen K, "Reduction of N2O over Char and Bed Material from CFBC," Proceedings of the 13th International Conference on Fluidized Bed Combustion, 859 (1995)
Johnsson JE, Johansen KD, "Reduction of N2O over Char and Bed Material from CFBC," Proceedings of the 6th International Workshop on N2O Emissions (1994)
Kim H, Park D, Korean J. Chem. Eng., 4(2), 143 (1987)
Kim DM, Rhee YW, Korean J. Chem. Eng., 16(6), 848 (1999)
Lee YY, Tsuo YP, Khan T, "Significant Factors Influencing N2O Emission from CFBC," Proceedings of the 6th International Workshop on N2O Emissions, 43 (1994)
Michael EC, Michael DM, Brian CY, "The Effect of Coal-Fuel Properties on N2O Emissions in Fluidized Bed Combustion," Proceedings of the 12th International Conference on Fluidized Bed Combustion, 1, 619 (1993)
Moritomi H, Suzuki Y, Kido N, Ogisu Y, "Nox Formation Mechanism of Circulating Fluidized Bed Combustion," Proceedings of the 11th International Conference on Fluidized Bed Combustion, 1005 (1991)
Peter FB, Johansen KD, "Limestone Catalyzed Reduction of NO and N2O under Fluidized Bed Combustion Conditions," Proceedings of the 12th International Conference on Fluidized Bed Combustion, 779 (1993)
Satterfield CN, "Heterogeneous Catalysis in Practice," McGraw-Hill (1993)
Shimizu T, Fujita D, Ishizu K, Kobayashi K, Inagaki M, "Effect of Limestone Feed on Emissions of Nox and N2O from a Circulating Fluidized Bed Combustor," Proceedings of the 12th International Conference on Fluidized Bed Combustion, 611 (1993)
Shimizu T, Tachiyama Y, Fujita D, Kumazawa K, Wakayama O, Ishizu K, Kobayashi S, Sikada S, Inagaki M, Energy Fuels, 6, 753 (1992)
Smith JM, "Chemical Engineering Kinetics," McGraw-Hill (1981)
de Soete GG, "Heterogeneous N2O and NO Formation from Bound Nitrogen Atoms during Coal Char Combustion," Proceedings of the 6th International Workshop on Nitrous Oxide Emissions, Turku/Abo, Finland, June 7-9, 5 (1994)

[Referenced By]

[Related Articles]

[1] Amand LE, Andersson, "Emissions of Nitrous Oxide from Fluidized Bed Boilers," Proceedings of the 10th International Conference on Fluidized Bed Combustion, 1, 49 (1989)

[2] Federal Energy Technology Center U.S. Department of Energy, "Green House Gases" (1999)

[3] Goel S, Morihara A, Tullin CJ, Sarofim AF, "Effect of NO and O2 Concentration on N2O Formation During Coal Combustion in a Fluidized Bed Combustor," 25th Symposium on Combustion, 1051 (1994)

[4] Hiltunen M, Kilpinen P, Hupa M, Lee YY, "N2O Emissions from CFB Boilers," Proceedings of the 11th International Conference on Fluidized Bed Combustion, 1, 687 (1991)

[5] Iisa K, Tullin C, Hupa M, "Simultaneous Sulfation and Recarbonation of Calcined Limestone under PFBC Conditions," Proceedings of the 11th International Conference on Fluidized Bed Combustion, 83 (1991)

[6] Johnsson JE, Dam-Johansen K, "Reduction of N2O over Char and Bed Material from CFBC," Proceedings of the 13th International Conference on Fluidized Bed Combustion, 859 (1995)

[7] Johnsson JE, Johansen KD, "Reduction of N2O over Char and Bed Material from CFBC," Proceedings of the 6th International Workshop on N2O Emissions (1994)

[8] Kim H, Park D, Korean J. Chem. Eng., 4(2), 143 (1987)

[9] Kim DM, Rhee YW, Korean J. Chem. Eng., 16(6), 848 (1999)

[10] Lee YY, Tsuo YP, Khan T, "Significant Factors Influencing N2O Emission from CFBC," Proceedings of the 6th International Workshop on N2O Emissions, 43 (1994)

[11] Michael EC, Michael DM, Brian CY, "The Effect of Coal-Fuel Properties on N2O Emissions in Fluidized Bed Combustion," Proceedings of the 12th International Conference on Fluidized Bed Combustion, 1, 619 (1993)

[12] Moritomi H, Suzuki Y, Kido N, Ogisu Y, "Nox Formation Mechanism of Circulating Fluidized Bed Combustion," Proceedings of the 11th International Conference on Fluidized Bed Combustion, 1005 (1991)

[13] Peter FB, Johansen KD, "Limestone Catalyzed Reduction of NO and N2O under Fluidized Bed Combustion Conditions," Proceedings of the 12th International Conference on Fluidized Bed Combustion, 779 (1993)

[14] Satterfield CN, "Heterogeneous Catalysis in Practice," McGraw-Hill (1993)

[15] Shimizu T, Fujita D, Ishizu K, Kobayashi K, Inagaki M, "Effect of Limestone Feed on Emissions of Nox and N2O from a Circulating Fluidized Bed Combustor," Proceedings of the 12th International Conference on Fluidized Bed Combustion, 611 (1993)

[16] Shimizu T, Tachiyama Y, Fujita D, Kumazawa K, Wakayama O, Ishizu K, Kobayashi S, Sikada S, Inagaki M, Energy Fuels, 6, 753 (1992)

[17] Smith JM, "Chemical Engineering Kinetics," McGraw-Hill (1981)

[18] de Soete GG, "Heterogeneous N2O and NO Formation from Bound Nitrogen Atoms during Coal Char Combustion," Proceedings of the 6th International Workshop on Nitrous Oxide Emissions, Turku/Abo, Finland, June 7-9, 5 (1994)