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NOx Chemistry and Emissions - II

Heterogeneous reactions (N20)

  • Chapter
Pollutants from Combustion

Part of the book series: NATO Science Series ((ASIC,volume 547))

Abstract

Nitrous oxide (N2O) concentrations in the atmosphere increase at an estimated rate of 0.7–0.8 ppb per year. The combustion of solid fuels and waste at lower temperatures (750–900 °C) constitutes a significant source of N2O. During stages of a coal particle combustion (pyrolysis-devolatilisation and char combustion) both volatile-N and char- N are mainly transformed to N2 + NO and partly to N2O. HCN was recognised as the main precursor for N2O in volatile combustion. Char-N conversion to N2O (through various mechanisms) is affected by “in situ” reduction of N2O by the carbon surface and CO.

The temperature is a key parameter for N2O emissions in combustion. At temperatures over 1000 °C, N2O emissions are negligible. In practical combustion systems char and CaO are the most effective catalysts for the thermal decomposition of N2O.

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Authors and Affiliations

  1. Institute of Chemical Process Fundamentals, Academy of Sciences, Rozvojová 135, 165 02, Praha 6, Czech Republic

    K. Svoboda, J. Cermák & V. Veselý

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  1. K. Svoboda
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  2. J. Cermák
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  3. V. Veselý
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Editors and Affiliations

  1. Laboratoire de Combustion et Systèmes Reactifs, CNRS, Orleans, Cedex, France

    Christian Vovelle

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© 2000 Springer Science+Business Media Dordrecht

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Svoboda, K., Cermák, J., Veselý, V. (2000). NOx Chemistry and Emissions - II. In: Vovelle, C. (eds) Pollutants from Combustion. NATO Science Series, vol 547. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4249-6_9

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  • DOI: https://doi.org/10.1007/978-94-011-4249-6_9

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-0-7923-6135-0

  • Online ISBN: 978-94-011-4249-6

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