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Effectiveness of nitric oxide ozonation

Kinga Skalska, Jacek S. Miller, and Stanisław Ledakowicz

Faculty of Process and Environmental Engineering, Technical University of Lodz, Wolczanska 213/215, 90-924 Lodz, Poland

 

E-mail: kiniaska@wp.pl

Abstract: Attempts to develop new technologies of NO x (NO + NO2) emission reduction are still carried out all around the world. One of the relatively new approaches is the application of ozone injection into the exhaust gas stream followed by the absorption process. Ozone is used to transform NO x to higher nitrogen oxides which yield nitric acid with better effectiveness. The main objective of this paper was to study the influence of mole ratio (MR) O3/NO used in the ozonation process of NO x on the effectiveness of NO x oxidation to higher oxides. The ozonation process was carried out in a flow reactor for concentrations of nitric oxide in the range of 1.5 × 10−5−7.7 × 10−5 mol dm−3 and varying O3/NO mole ratios. Measurements were conducted with the use of a FTIR spectrometer. The results obtained prove that for MR higher than 1, the oxidation effectiveness of nitric oxides generally reaches 95 %, whereas for MR higher than 2, oxidation of NO x to higher nitrogen oxides is completed.

Keywords: air pollution – nitrogen oxides – ozone

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-010-0082-y

 

Chemical Papers 65 (2) 193–197 (2011)

Tuesday, August 04, 2020

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