Study on efficient removal of SOx and NOx from marine exhaust gas by wet scrubbing method using urea peroxide solution

Zhou, Jinxi; Wang, Hewen

doi:10.1016/j.cej.2020.124567

Cited by 47 publications

(17 citation statements)

References 29 publications

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“…As an oxidant with a high water content (the moisture content of industrial grade H 2 O 2 is up to 72.5%), H 2 O 2 has several disadvantages in the large-scale transportation/storage and liquid products concentration by heating after the reaction. Some researchers − used solid peroxides such as potassium peroxymonosulfate (or oxone), persulfate, and urea peroxide, which are easier to transport/store and concentrate the product, to remove pollutants such as SO 2 , NO, Hg 0 , and As 2 O 3 . Adewuyi et al .…”

Section: Peroxide Oxidationmentioning

confidence: 99%

“…The oxidation products were mainly nitrate and a small amount of nitrite. Zhou et al proposed a process capable of removing NO x and SO x in marine exhaust gas, which can achieve higher NO x and SO x removal efficiency and lower nitrate concentration using urea peroxide in a countercurrent scrubber. They explored the effects of several key parameters on NO removal, which indicated that temperature and liquid–gas ratio played key roles, and the NO x removal efficiency increased with the increase of temperature and liquid–gas ratio.…”

Section: Peroxide Oxidationmentioning

confidence: 99%

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Review on Removal of SO₂, NO_x, Mercury, and Arsenic from Flue Gas Using Green Oxidation Absorption Technology

Wang

Liu

2021

Energy Fuels

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Emission of SO2, NO x , mercury (Hg), and arsenic (As) from flue gas has become a great public concern due to their hazards for human health and ecosystems. Simultaneous removal of multipollutants (two or more of SO2, NO x , Hg, and As) has good development prospects due to its simple system and low cost. Although many multipollutant simultaneous removal technologies have been developed, green oxidation absorption is one of the most promising technologies because it can not only make full use of the existing WFGD devices, but also its treatment process is clean. This review analyzes the latest research advances in the removal of SO2, NO x , Hg, and As from flue gas using green oxidation absorption technologies. The performance, mechanism, and kinetics of SO2, NO x , Hg, and As removal are reviewed. The merits and drawbacks of these green oxidation absorption technologies and the potential research directions are commented on. This review indicates that each technology has its own advantages and disadvantages in terms of removal efficiency, cost, reliability, and product post-treatment. Photochemical and electrochemical removal technologies have a high free radical yield and pollutant removal efficiency, but they have complex systems, high energy consumption, or unreliable systems. Metal oxide-activated peroxide oxidation technology has a good prospect due to its simple process, low device requirements, and recyclability of catalysts. However, it also has shortcomings such as a low free radical yield and easy deactivation of catalysts. Other technologies also have some disadvantages, such as high cost, low free radical yield, difficult separation of products, complex equipment, and/or low reliability. Synergic use of multitechnologies may be a promising strategy because it can make up for the shortcomings of each technology.

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Section: Peroxide Oxidationmentioning

confidence: 99%

Section: Peroxide Oxidationmentioning

confidence: 99%

Review on Removal of SO₂, NO_x, Mercury, and Arsenic from Flue Gas Using Green Oxidation Absorption Technology

Wang

Liu

2021

Energy Fuels

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“…The use of only one device for cleaning pollutants is not always effective; in addition, it is important to develop a comprehensive and effective technology for the simultaneous removal of pollutants. In combination with a countercurrent scrubber, a catalytic process using urea peroxide can be additionally applied, which can remove both SO x and NO x from marine exhaust gas [53].…”

Section: So X Scrubber Technologymentioning

confidence: 99%

Materials for CO2, SOx, and NOx Emission Reduction

Shelyapina

Rodrı́guez-Iznaga

Petranovskii

2020

Handbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications

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Industrial development and urbanization require effective constant monitoring and effective removal of major air pollutants. Three of them, the fight against which is discussed in this chapter, appear in the process of burning fuel, although their genesis is different. Sulfur oxide is formed as a result of the combustion of impurities either in hydrocarbons, and in this case, the fight against it should begin with a deep cleaning of the fuel, or by burning coal, and then you have to deal with the desulfurization of exhaust gases. Nitrogen oxide pollutants are formed at high temperatures from nitrogen present in the air, and purification, respectively, occurs in the exhaust gases of heat engines. Carbon dioxide is the main product of the combustion of any fuel and, accordingly, requires special methods for its removal. The environmental impact of these gases is also different. SO x and NO x are pollutants that form smog and acid rain. CO 2 is greenhouse gas, and its removal is becoming one of the main goals for climate stabilization. Given these differences, this review of existing materials and processes to eliminate the three main gaseous air pollutants has been made.

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“…There are many research works focused on simultaneous removal technologies for multiple air pollutants. − Among these technologies, ozone oxidation and absorption is believed to be an effective technique because it removes NOx and SO 2 simultaneously with high efficiency and low cost. − It is widely used in lots of industrial fields for NOx removal. , Meanwhile, it was also reported that Hg 0 could be oxidized by ozone. − Therefore, it may be a good choice to remove Hg 0 and NOx simultaneously by ozone oxidation and adsorption. However, there is a drawback that the oxidation efficiency of Hg 0 is less than 40.0% in the presence of NO. − The possible reason for this could be that the Hg 0 oxidation reaction by ozone was restrained because of the competition reaction between O 3 and NO.…”

Section: Introductionmentioning

confidence: 99%

“…21−23 It is widely used in lots of industrial fields for NOx removal. 24,25 Meanwhile, it was also reported that Hg 0 could be oxidized by ozone. 26−28 Therefore, it may be a good choice to remove Hg 0 and NOx simultaneously by ozone oxidation and adsorption.…”

Section: Introductionmentioning

confidence: 99%

Radical-Induced Oxidation Removal of Mercury by Ozone Coupled with Bromine

et al. 2020

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Ozone oxidation and absorption is an effective technique for air pollutant removal from industrial flue gas. However, it is hard to remove Hg 0 because of the competition reaction between O 3 and NOx. In order to enhance the mercury removal by O 3 in the presence of NO, SO 2 , and other flue gas components, bromine was used as the oxidation promoter in this research. The experimental data showed that the mercury removal efficiency was improved significantly when Br 2 was introduced into the reaction system. The mechanism and main factors of mercury removal by O 3 and Br 2 were studied. The box model calculation showed that the O radical inspired the generation of Br and BrO radicals. And, the Br and BrO radicals were the key factors which enhanced the Hg 0 oxidation by O 3 in the presence of NO. In the full-scale experiments, mercury removal efficiency was near 90% when only 0.68 ppmv bromine was injected into the real coal-fired flue gas with 101 ppmv O 3 . Therefore, it is helpful through introducing bromine to enhance the mercury removal by excess ozone during the NOx removal process.

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Study on efficient removal of SOx and NOx from marine exhaust gas by wet scrubbing method using urea peroxide solution

Cited by 47 publications

References 29 publications

Review on Removal of SO₂, NO_x, Mercury, and Arsenic from Flue Gas Using Green Oxidation Absorption Technology

Review on Removal of SO₂, NO_x, Mercury, and Arsenic from Flue Gas Using Green Oxidation Absorption Technology

Materials for CO2, SOx, and NOx Emission Reduction

Radical-Induced Oxidation Removal of Mercury by Ozone Coupled with Bromine

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Study on efficient removal of SOx and NOx from marine exhaust gas by wet scrubbing method using urea peroxide solution

Cited by 47 publications

References 29 publications

Review on Removal of SO2, NOx, Mercury, and Arsenic from Flue Gas Using Green Oxidation Absorption Technology

Review on Removal of SO2, NOx, Mercury, and Arsenic from Flue Gas Using Green Oxidation Absorption Technology

Materials for CO2, SOx, and NOx Emission Reduction

Radical-Induced Oxidation Removal of Mercury by Ozone Coupled with Bromine

Contact Info

Product

Resources

About

Review on Removal of SO₂, NO_x, Mercury, and Arsenic from Flue Gas Using Green Oxidation Absorption Technology

Review on Removal of SO₂, NO_x, Mercury, and Arsenic from Flue Gas Using Green Oxidation Absorption Technology