The effect of ozone feeding mode on the effectiveness of NO oxidation

Jakubiak, Maciej; Kordylewski, W.

doi:10.2478/v10176-011-0018-2

Cited by 11 publications

(7 citation statements)

References 15 publications

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“…Ozone was produced by the ozone generator 6 of the type OZAT CFS-3 2G of Degremont Technologies Ltd (Ozonia) which was fed by oxygen (2.6 m 3 /h) from the steel cylinder 5. The ozone flow rate into the flue gas duct was controlled by the method described elsewhere (Jakubiak and Kordylewski, 2011).…”

Section: Methodsmentioning

confidence: 99%

Pilot-scale studies on NOx removal from flue gas via NO ozonation and absorption into NaOH solution

Jakubiak¹,

Kordylewski²

2012

Chemical and Process Engineering

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The paper presents results of experimental studies on removal of NOx from flue gas via NO ozonation and wet scrubbing of products of NO oxidation in NaOH solutions. The experiment was conducted in a pilot plant installation supplied with flue gas from a coal-fired boiler at the flow rate 200 m3/h. The initial mole fraction of NOx,ref in flue gas was approx. 220 ppm, the molar ratio X = O3/NOref varied between 0 and 2.5. Ozone (O3 content 1÷5% in oxygen) was injected into the flue gas channel before the wet scrubber. The effect of the mole ratio X, the NaOH concentration in the absorbent, the liquid-to-gas ratio (L/G) and the initial NOx concentration on the efficiency of NOx removal was examined. Two domains of the molar ratio X were distinguished in which denitrification was governed by different mechanisms: for X ≤ 1.0 oxidation of NO to NO2 predominates with slow absorption of NO2, for X >> 1.0 NO2 undergoes further oxidation to higher oxides being efficiently absorbed in the scrubber. At the stoichiometric conditions (X = 1) the effectiveness of NO oxidation was better than 90%. However, the effectiveness of NOx removal reached only 25%. When ozonation was intensified (X ≥ 2.25) about 95% of NOx was removed from flue gas. The concentration of sodium hydroxide in the aqueous solution and the liquid-to-gas ratio in the absorber had little effect on the effectiveness of NOx removal for X > 2.

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Section: Methodsmentioning

confidence: 99%

Pilot-scale studies on NOx removal from flue gas via NO ozonation and absorption into NaOH solution

Jakubiak¹,

Kordylewski²

2012

Chemical and Process Engineering

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“…Experimental research was carried out in the laboratory apparatus presented in details in previous studies (Jakubiak and Kordylewski, 2011). The oxidation flow reactor was made from a Plexiglas tube of the inner diameter D = 60 mm and the length L = 2 m. In order to provide uniform flow velocity profile and generate turbulence a steel grid with the mesh 0.5×0.5 mm was installed at the inlet of the reactor.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore the performance of NO oxidation with ozone is important, because NO x cannot be effectively captured in an absorber without conversion of NO into higher oxides. Currently numerous publications describing chemical process of nitrogen monoxide oxidation with ozone are available (Jakubiak and Kordylewski, 2011;Jaroszyńska-Wolińska, 2009;Mok and Lee, 2006;Nelo et al, 1997;Puri, 1995;Skalska et al, 2011;Wang et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of O3 and NO Reacting in a Tubular Flow Reactor

Modliński¹,

Kordylewski²,

Jakubiak³

2013

Chemical and Process Engineering

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A process capable of NO x control by ozone injection gained wide attention as a possible alternative to proven post combustion technologies such as selective catalytic (and non-catalytic) reduction. The purpose of the work was to develop a numerical model of NO oxidation with O 3 that would be capable of providing guidelines for process optimisation during different design stages. A Computational Fluid Dynamics code was used to simulate turbulent reacting flow. In order to reduce computation expense a 11-step global NO -O 3 reaction mechanism was implemented into the code. Model performance was verified by the experiment in a tubular flow reactor for two injection nozzle configurations and for two O 3 /NO ratios of molar fluxe. The objective of this work was to estimate the applicability of a simplified homogeneous reaction mechanism in reactive turbulent flow simulation. Quantitative conformity was not completely satisfying for all examined cases, but the final effect of NO oxidation was predicted correctly at the reactor outlet.

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“…It mainly takes place in the transformation of hemicelluloses, or in the transformation of cellulose and lignin. The result of this process is a 30% weight loss, the release of so-called torgas, and the obtaining of biochar [116,117]. Biochar has very interesting properties, such as the ability to bind organic and inorganic pollutants and the ability to retain nutrients and water-the raw material can be used as a soil improver or a sorbent to remove pollutants [118].…”

Section: The Use Of Biocharmentioning

confidence: 99%

The Reuse of Biomass and Industrial Waste in Biocomposite Construction Materials for Decreasing Natural Resource Use and Mitigating the Environmental Impact of the Construction Industry: A Review

Ryłko-Polak

Komala²,

Białowiec

2022

Materials

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The construction industry is the world’s largest emitter of greenhouse gases. The CO2 emission levels in the atmosphere are already reaching a tipping point and could cause severe climate change. An important element is the introduction of a technology that allows for the capture and sequencing of carbon dioxide levels, reducing both emissions and the carbon footprint from the production of Portland cement and cement-based building materials. The European Union has started work on the European Climate Law, establishing the European Green Deal program, which introduces the achievement of climate neutrality in the European Union countries. This includes a new policy of sustainable construction, the aim of which is to develop products with a closed life cycle through proper waste management. All efforts are being made to create generated waste and thus to support their production and/or use as substitutes for raw materials to produce biocomposites. This article reviews environmental issues and characterizes selected waste materials from the agri-food, mineral, and industrial sectors with specific properties that can be used as valuable secondary raw materials to produce traditional cements and biocomposite materials, while maintaining or improving their mechanical properties and applications.

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The effect of ozone feeding mode on the effectiveness of NO oxidation

Cited by 11 publications

References 15 publications

Pilot-scale studies on NOx removal from flue gas via NO ozonation and absorption into NaOH solution

Pilot-scale studies on NOx removal from flue gas via NO ozonation and absorption into NaOH solution

Numerical Simulation of O3 and NO Reacting in a Tubular Flow Reactor

The Reuse of Biomass and Industrial Waste in Biocomposite Construction Materials for Decreasing Natural Resource Use and Mitigating the Environmental Impact of the Construction Industry: A Review

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