Simultaneous removal of SO2 and NO by sodium chlorite solution in wetted-wall column

Lee, Hyung-Keun; Deshwal, Bal Raj; Yoo, Kyung-Seun

doi:10.1007/bf02701486

Cited by 50 publications

(39 citation statements)

References 23 publications

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“…Despite the many successful commercial implementations of individual desulfurization and denitrification processes, a considerable amount of attention has recently been focused on the simultaneous removal of SO x and NO x within a single reactor, considering the capital investment, operating cost and space for equipment inherent to the processes [2]. A minor adjustment of the FGD system may prove sufficient for the successful operation of a simultaneous SO x /NO x removal system, and should also prove cost-effective.…”

Section: Introductionmentioning

confidence: 99%

“…A minor adjustment of the FGD system may prove sufficient for the successful operation of a simultaneous SO x /NO x removal system, and should also prove cost-effective. In general, additives must be added to a scrubbing system in order to effect the oxidation of the relatively water-insoluble NO to soluble NO 2 , which can then be removed via alkaline absorbents [1,2]. Therefore, in the development of efficient simultaneous SO x /NO x removal systems, chemical reagents, including FeSO 4 /H 2 SO 4 , FeSO 4 /Na 2 SO 3 , Fe(II)-EDTA, Korean J. Chem.…”

Section: Introductionmentioning

confidence: 99%

“…Postcombustion treatments include a variety of techniques, including selective non-catalytic reduction (SNCR), selective catalytic reduction (SCR), thermal De-NO x , scrubbing and several others [2]. Among these technologies, scrubbing methods are the most economically competitive, and also carry the advantage of simultaneously controlling other acid gases and particulates [2,9].…”

Section: Introductionmentioning

confidence: 99%

“…The most effective technology for the removal of SO 2 is flue gas desulfurization (FGD). Commercial processes for SO 2 removal utilize limestone slurry as a scrubbing solution [2][3][4]. These wet FGD processes have been widely implemented, as a consequence of their generally low cost, ease of operation, and high SO x removal efficiency, in comparison to other processes [2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, a number of research efforts have sought to develop a method for the removal of these oxides, in an attempt to protect the atmosphere against pollution [1,2].…”

Section: Introductionmentioning

confidence: 99%

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Simultaneous removal of SO2, NO and particulate by pilot-scale scrubber system

Jung

Jeong

Lee

et al. 2007

Korean J. Chem. Eng.

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SO x and NO x have both previously been identified as primary precursors of acid rain, and thus the abatement of SO x and NO x emissions constitutes a major target in the field of air pollution control. In this study, the efficacy of a pilot-scale scrubber was evaluated with regard to the simultaneous removal of SO 2 , NO and particulate with wet catalysts. The removal efficiencies of particulate were measured to be 83, 92 and 97% with catalyst flux of 0.5, 0.8 and 1.5 L/min, respectively. The average removal efficiencies of particulate with different nozzles were approximately 94 and 90% with FF6.5 (5/8 in.) and 14 W (1.0 in.) nozzles, respectively. At least 96-98% of particulate and SO 2 were removed, regardless of the stage number of reactor. In a one-stage scrubber, 83.3% removal efficiency of NO was achieved after 48 hours; however, the two-stage scrubber achieved an NO removal efficiency of 95.7%. Regardless of the liquidgas ratio, SO 2 and particulate were removed effectively, whereas NO was removed about 84% and 74% under liquidgas ratio conditions of 39.32 L/m 3 and 27.52 L/m 3 , respectively. In experiments using STS and P.P. pall ring as packing material, particulate and SO 2 removal efficiency values in excess of 98% were achieved; however, NO removal was correlated with the different packing materials tested in this study. With the above optimum operation conditions, even after 20 hours, the removal efficiency for NO stayed at 95% or higher, the removal efficiency for SO 2 stayed at 97% or higher, and the removal efficiency for particulate stayed at 92% or higher. In accordance, then, with the above results, it appears that this process might be utilized in scrubber systems, as well as systems designed to simultaneously remove particulate, SO 2 and NO from flue gas.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Recently, a number of research efforts have sought to develop a method for the removal of these oxides, in an attempt to protect the atmosphere against pollution [1,2].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Simultaneous removal of SO2, NO and particulate by pilot-scale scrubber system

Jung

Jeong

Lee

et al. 2007

Korean J. Chem. Eng.

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Reactive absorption of NO and SO₂ into aqueous NaClO in a counter‐current spray column

Raghunath

Mondal

2015

Asia-Pacific J Chem Eng

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The experiments were performed in a spray column to study the simultaneous absorption of NO and SO2 using NaClO solution from simulated gas stream under various experimental conditions. The effects of various influencing parameters, such as absorbent concentration, reaction temperature, initial SO2 and NO concentration, and initial pH of NaClO solution on simultaneous removal of SO2 and NO, were emphatically investigated in regard to coal‐fired thermal power plant stack gas emission control. The maximum removal efficiencies of SO2 and NO were found as 97% and 87.8%, respectively, at 313 K, initial NaClO solution pH 5.4 and 0.024 M NaClO concentration. The addition of CO2 in simulated gas stream was also carried out to see its influence on removal efficiency of SO2 and NO. The results using a spray column showed that NaClO can be used effectively for simultaneous removal of NO and SO2from coal‐fired thermal power plant simulated gas stream. © 2015 Curtin University of Technology and John Wiley & Sons, Ltd.

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New experimental data for absorption of SO₂ into DMA solution

Rajendra

Raghunath

Mondal

2016

Env Prog and Sustain Energy

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Removal of SO2 and its accurate prediction from the flue gases emitted from various chemical industries in a techno‐econo‐enviro manner is of great importance. The experiments were conducted in a bubble column to study the absorption of SO2 into dimethyl amine (DMA) solution from simulated gas stream as absorption of SO2 in DMA solution yields an ionic liquid. The effects of DMA concentration, initial SO2 concentration, absorbent temperature, and the initial pH value of absorbent on SO2 removal were investigated by using DMA solution. The experimental results showed that the SO2 saturation uptake increased with increase in absorbent concentration. The maximum removal efficiency of approximately 100% was observed at 9.32 mol/dm3 DMA solution, temperature of 303 K and initial DMA solution pH 11. The mass transfer coefficient based on the liquid phase increases with increasing partial pressure of SO2 in inlet gas stream. The lethal air pollutant SO2 is an acidic gas emitted from combustion of fossil fuel. The removal of SO2 from flue gas streams was investigated through absorption by using an organic solvent DMA. Absorption of SO2 into DMA gives di‐methyl ammonium N,N‐dimethyl amidosulfinate an ionic liquid. The absorption of SO2 using DMA has dual benefits in terms of resource generation as ionic liquid production resulting in omission of absorbent regeneration step and SO2 emission control from waste gas stream. The value of kLa increases with increasing partial pressure of SO2 in inlet gas stream. The DMA showed an excellent performance on SO2 absorption. © 2016 American Institute of Chemical Engineers Environ Prog, 35: 1298–1304, 2016

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Simultaneous removal of SO2 and NO by sodium chlorite solution in wetted-wall column

Cited by 50 publications

References 23 publications

Simultaneous removal of SO2, NO and particulate by pilot-scale scrubber system

Simultaneous removal of SO2, NO and particulate by pilot-scale scrubber system

Reactive absorption of NO and SO₂ into aqueous NaClO in a counter‐current spray column

New experimental data for absorption of SO₂ into DMA solution

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Simultaneous removal of SO2 and NO by sodium chlorite solution in wetted-wall column

Cited by 50 publications

References 23 publications

Simultaneous removal of SO2, NO and particulate by pilot-scale scrubber system

Simultaneous removal of SO2, NO and particulate by pilot-scale scrubber system

Reactive absorption of NO and SO2 into aqueous NaClO in a counter‐current spray column

New experimental data for absorption of SO2 into DMA solution

Contact Info

Product

Resources

About

Reactive absorption of NO and SO₂ into aqueous NaClO in a counter‐current spray column

New experimental data for absorption of SO₂ into DMA solution