Dependence of N 2 O/NO Decomposition and Formation on Temperature and Residence Time in Thermal Reactor

Sang Ji Lee, Jae Geun Yun, Han Min Lee, Ji Yeop Kim, Jin Han Yun and Jung Goo Hong
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Sang Ji Lee: School of Mechanical Engineering, Kyungpook National University, Buk-gu, Daegu 41566, Korea
Jae Geun Yun: School of Mechanical Engineering, Kyungpook National University, Buk-gu, Daegu 41566, Korea
Han Min Lee: School of Mechanical Engineering, Kyungpook National University, Buk-gu, Daegu 41566, Korea
Ji Yeop Kim: School of Mechanical Engineering, Kyungpook National University, Buk-gu, Daegu 41566, Korea
Jin Han Yun: Department of Environmental Machinery, Korea Institute of Machinery & Materials, Yuseong-gu, Daejeon 34103, Korea
Jung Goo Hong: School of Mechanical Engineering, Kyungpook National University, Buk-gu, Daegu 41566, Korea

Energies, 2021, vol. 14, issue 4, 1-11

Abstract: Nitrogen dioxide (N 2 O) is a greenhouse gas that is harmful to the ozone layer and contributes to global warming. Many other nitrogen oxide emissions are controlled using the selective non-catalytic reaction (SNCR) process, but N 2 O reduction methods are few. To avoid future air pollution problems, N 2 O reduction from industrial sources is essential. In this study, a N 2 O decomposition and NO formation under an argon atmospheric N 2 O gas mixture were observed in a lab-scale SNCR system. The reaction rate and mechanism of N 2 O were calculated using a reaction path analyzer (CHEMKIN-PRO). The residence time of the gas mixture and the temperature in the reactor were set as experimental variables. The results confirmed that most of the N 2 O was converted to N 2 and NO. The change in the N 2 O reduction rate increased with the residence time at 1013 and 1113 K, but decreased at 1213 K due to the inverse reaction. NO concentration increased with the residence time at 1013 and 1113 K, but decreased at 1213 K owing to the conversion of NO back to N 2 O.

Keywords: nitrous oxide (N 2 O); nitric oxide (NOx); argon (Ar) ambient; thermal decomposition; residence time; rate of progress; GRI-Mech 3.0 (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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