Kinetic model of NOx ozonation and its experimental verification

Skalska, Kinga; Miller, Jacek S.; Ledakowicz, S.

doi:10.1016/j.ces.2011.01.028

Cited by 46 publications

(26 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Therefore, to fully understand the ozonation process studies in the batch reactor were conducted. Based on the obtained experimental data the kinetic model for the ozonation process of NO x was proposed, and the reaction rate constants were determined and experimentally verified (Skalska et al 2011b).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Nitrogen Oxides Ozonation as a Method for NO_xEmission Abatement

Skalska

Miller

Wilk³

et al. 2012

Ozone: Science & Engineering

Self Cite

View full text Add to dashboard Cite

Attempts to develop new technologies of reduction of NO x emission are still carried out all around the world. However, most of them as literature survey suggests is focused on NO x emission control from power plants and mobile vehicles. Fewer investigations are conducted on the NO x emission abatement from the chemical industry. One of the relatively new approaches is the application of ozone injection into exhaust gas stream followed by an absorption process. Ozone is used to transform NO x to higher nitrogen oxides that are more soluble in water, and therefore the higher yield of nitric acid is expected. The main objective of this article is to present results of our studies in which the effectiveness of the ozonation process, as well as the dependence of the conversion rate and the selectivities of NO ozonation into NO 2 , N 2 O 5 and HNO 3 on the residence time of reagents in the reactor space were studied. Results of laboratory investigations were confirmed during ozonation experiments with real exhaust gases from a nitric acid pilot plant in

show abstract

Section: Resultsmentioning

confidence: 99%

“…As a result the residence time was in the range from 10 to 30 seconds. An overview of the experimental setup was described in previous articles (Skalska et al 2010b(Skalska et al , 2011a(Skalska et al , 2011b.…”

Section: Methodsmentioning

confidence: 99%

Nitrogen Oxides Ozonation as a Method for NO_xEmission Abatement

Skalska

Miller

Wilk³

et al. 2012

Ozone: Science & Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…In fact, NO 2 solubility is low (0.3÷0.5 g/l for p NO2 = 0.1 MPa), which is only one order higher than the solubility of NO [10]. The absorbed NO 2 reacts with water producing nitrous and nitric acid [18]:…”

Section: Mechanism Of No Oxidation By Ozonementioning

confidence: 99%

Pilot Plant Studies on Nox Removal Via No Ozonation and Absorption

Kordylewski¹,

Jakubiak²,

Hardy³

2013

Archives of Environmental Protection

View full text Add to dashboard Cite

Abstract:The results of experimental investigations on the removal of NO x from gases applying ozone as the oxidizing agent and the absorption of higher nitrogen oxides in the sodium hydroxide solutions are presented. The experiment was conducted using a pilot plant installation with the air fl ow rate 200 m 3 /h, being a prototype of a boiler fl ue gas duct and a FGD scrubber. It was shown that in the range of [NO ref ] = 50 ÷ 250 ppm the mechanism of NO ozonation depends on the molar ratio X = O 3 /NO ref : for X ≤ 1.0 oxidation of NO to NO 2 predominates and NO 2 is poorly absorbed, for X >> 1.0 NO 2 undergoes further oxidation to N 2 O 5 , which is effi ciently absorbed in the scrubber. The stoichiometric molar ratio of complete conversion of NO into N 2 O 5 is X = 1.5, in these studies to reach the effectiveness η ≥ 90% the molar ratio X was much higher (2.75).

show abstract

Section: The Mechanisms Of Chemical Reactions Of Nox and So2 With Ozonementioning

confidence: 99%

“…The basic reaction scheme of NOx oxidation by ozone in gaseous phase is as follows (Skalska et al, 2011) The products of NOx oxidation in gaseous phase are determined by the molar ratio O3/NO in the temperature range of 20−100 °C. For O3/NO ≈ 1 the main nitrogenous component of flue gas after ozonation remains NO2, because the reaction (1) is fast (Skalska et al, 2011) and the product of reaction (2) N2O3 is unstable. However, the role of N2O3 in the absorber cannot be overestimated, because N2O3 is well-soluble, while NO and NO2 are only weakly-soluble (Sander, 1999 (9) However, the efficiency NOx capture in this way (8, 9) from flue gas is limited to about 60% due to the reactions of disproportionation of nitrous acid with release of NO (Joshi et al, 1985) (11) Further increasing the molar ratio O3/NO > 1 results in oxidation of NO2 to NO3 in reaction (3), which combined with NO2 gives a very well-soluble dinitrogen pentoxide (N2O5) (Wang et al, 2015).…”

Section: The Mechanisms Of Chemical Reactions Of Nox and So2 With Ozonementioning

confidence: 99%

Influence of Oxidizing Reactor on Flue Gas Denitrification by Ozonation and Possibility of by-Product Separation

Kordylewski

Hałat

Łuszkiewicz

2017

Chemical and Process Engineering

View full text Add to dashboard Cite

Results of laboratory scale research have been presented on the effects of an oxidizing reactor on ozone consumption and by-producs composition and separation of simultaneous NOx and SO2 removal from a carrier gas by ozonation method and absorption in an alkaline solution. The additional Dreschel washer added before two washers containing 100 ml of 0.1 molar NaOH solution played the role of an oxidation reactor. Its effect was investigated using an empty (dry or wetted) or filled with packing elements washer. The measured by-products in a scrubber and in the oxidizing reactor were SO3 2-, SO4 2-, NO2 -and NO3 -ions, respectively. It has been shown that use of oxidizing reactor improves NOx removal efficiency reducing ozone consumption. Wetting of the oxidation reactor with water enables a preliminary separation of sulphur and nitrogen species between the oxidizing reactor and an alkaline absorber. Application of packing elements in the oxidizing reactor allows to retain 90% of nitrogen compounds in it. Some results were confirmed by tests in pilot scale.

show abstract

Kinetic model of NOx ozonation and its experimental verification

Cited by 46 publications

References 20 publications

Nitrogen Oxides Ozonation as a Method for NO_xEmission Abatement

Nitrogen Oxides Ozonation as a Method for NO_xEmission Abatement

Pilot Plant Studies on Nox Removal Via No Ozonation and Absorption

Influence of Oxidizing Reactor on Flue Gas Denitrification by Ozonation and Possibility of by-Product Separation

Contact Info

Product

Resources

About

Kinetic model of NOx ozonation and its experimental verification

Cited by 46 publications

References 20 publications

Nitrogen Oxides Ozonation as a Method for NOxEmission Abatement

Nitrogen Oxides Ozonation as a Method for NOxEmission Abatement

Pilot Plant Studies on Nox Removal Via No Ozonation and Absorption

Influence of Oxidizing Reactor on Flue Gas Denitrification by Ozonation and Possibility of by-Product Separation

Contact Info

Product

Resources

About

Nitrogen Oxides Ozonation as a Method for NO_xEmission Abatement

Nitrogen Oxides Ozonation as a Method for NO_xEmission Abatement