Experimental study on removal performance of SO2 and NOx in marine exhaust gas using seawater/urea peroxide solution and analysis of ions concentration change

Zhou, Jinxi; Ma, J.; Wang, Zhanguang

doi:10.1016/j.fuproc.2021.107133

Cited by 15 publications

(4 citation statements)

References 18 publications

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“…To date, the catalytic oxidation method has emerged as the predominant purification technique employed in the industry owing to its remarkable efficacy. [5][6][7] Common catalysts include metallic oxide, carbon-based catalysts, single-atom catalysts, and so forth. [8][9][10] Recently, the liquid phase catalytic oxidation denitration technology has garnered increasing attention.…”

Section: Introductionmentioning

confidence: 99%

Ozone oxidation of nitric oxide: Promoting effect of phosphorus and inhibitory effect of phosphoric acid

Yang,

Tian,

Ning

et al. 2024

Can J Chem Eng

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This work presents experimental and density functional theory theoretical methods to carry out the catalytic role and reaction mechanism of phosphorus (P4) for liquid phase catalytic oxidation nitric oxide. Meanwhile, it carries out the promoting effect of phosphorus and inhibitory effect of phosphoric acid in the ozone oxidation of nitric oxide. The work reveals the significant involvement of P4 in facilitating the NO catalytic oxidation process by generating O3. Meanwhile, the presence of phosphoric acid (H3PO4) hindered the NO catalytic removal process. The calculation results highlight that P4 promoted the formation of O3 and favoured the oxidation pathway (oxidation‐hydration, NO ➔ NO2 ➔ HNO3). During the liquid‐phase NO catalytic removal process, O2 and NO dissolved into the solution, where O2 exhibited preferential adsorbed on P4, promoting the O3 formation. Subsequently, O3 first oxidized NO to NO2. Then, HNO2 and HNO3 were generated under the hydration reaction of NO2 and H2O. Next, O3 further oxidized the generated HNO2 to HNO3, realizing the complete oxidation of NO. The hydration step of NO2 was identified as the key step in the O3 oxidation processes. Furthermore, the generation of H3PO4 led to the consumption of P4 and inhibited the NO removal process. O3 played the crucial role in liquid phase NO oxidation.

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Section: Introductionmentioning

confidence: 99%

Ozone oxidation of nitric oxide: Promoting effect of phosphorus and inhibitory effect of phosphoric acid

Yang,

Tian,

Ning

et al. 2024

Can J Chem Eng

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“…1 Although some new energy sources are emerging as alternative fuels for vessels at present, fossil fuels are still the main fuel type for on-going vessels, which brings about a large amount of CO 2 emission. [2][3][4] The Fourth Greenhouse Gas Study 2020 released by International Maritime Organization (IMO) reports that, total CO 2 emission from global maritime industry has reached up to 1076 million tons in 2018. 5 Since it requires to reduce marine greenhouse gas emissions more than 50% by 2050 for massive vessels, it is impending to explore new techniques to solve this problem.…”

Section: Introductionmentioning

confidence: 99%

“…It is well known that, maritime transport always plays an important role in global trade transport, which undertakes more than 90% in value of international trade logistics 1 . Although some new energy sources are emerging as alternative fuels for vessels at present, fossil fuels are still the main fuel type for on‐going vessels, which brings about a large amount of CO 2 emission 2‐4 . The Fourth Greenhouse Gas Study 2020 released by International Maritime Organization (IMO) reports that, total CO 2 emission from global maritime industry has reached up to 1076 million tons in 2018 5 .…”

Section: Introductionmentioning

confidence: 99%

An investigation on the effects of organic additives on CO₂ capture performance of Na₂CO₃ solution

Wang,

Han,

Liu

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUNDThe large‐scale practical application of CO2 capture using carbonate solutions is mainly limited by their low CO2 absorption rate. In view of this, it is feasible to improve CO2 capture performance of carbonate solution by adding additives. In this paper, low‐cost sodium carbonate (Na2CO3) solution was selected as the main CO2 absorbent, and the effects of different organic additives on CO2 capture performance of Na2CO3 solutions were systematically investigated.RESULTSThe results showed that 0.04 mol/L tetrabutylammonium bromide (TBAB) could achieve a better enhancement effect on CO2 capture performance of Na2CO3 solution. After addition of TBAB, the maximum CO2 absorption rate of Na2CO3 solution was improved to 2.52 × 10−3 mol/min, which increased by 105%. And the maximum CO2 desorption rate could also be improved by 45%. TBAB/Na2CO3 system not only realized a high CO2 absorption capacity of 0.769 mol/mol, but also maintained 82% of the initial CO2 absorption capacity after three cyclic tests. The regeneration heat duty of TBAB/Na2CO3 solution was calculated to be 1136.6 kJ/mol, which was significantly lower than that of single Na2CO3 solution and conventional MEA aqueous solution. The promotion mechanism of TBAB in Na2CO3 solution was explored using Fourier transform infrared spectra (FTIR) and 13C nuclear magnetic resonance (NMR) analysis.CONCLUSIONThe introduction of TBAB additive could significantly improve CO2 capture performance of Na2CO3 solution and reduce regeneration heat duty, making it a possible option in the field of post‐combustion CO2 capture. © 2023 Society of Chemical Industry (SCI).

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“…Improving adsorbent formulas may realistically enhance NO 2 absorption efficiencies. There are reports on various absorbents such as redox solutions, ionic liquids, and metal complexes for efficient denitrification: Zhou et al 14 employing a sulfite/urea absorbent obtained an optimized NO 2 removal efficiency of >80%. Duan et al 15 reported a NO 2 absorption capacity of 0.0854 mole fraction solubility using CPL/TBAB.…”

Section: Introductionmentioning

confidence: 99%

Mechanism and Kinetic Study of Cyclodextrin Use to Facilitate NO₂ Absorption in Sulfite Solutions

Lian

Zhang

et al. 2022

Environ. Sci. Technol.

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An innovative strategy to control nitrogen oxide emission from flue gas was developed using the wet flue gas denitrification technology. The use of cyclodextrin (CD) as an additive facilitated NO2 absorption by the sulfite absorbent. Compared with absorption by a sulfite solution (59.12%), the instantaneous absorption efficiencies employing CD improved to 94.57%. Moreover, 48 h of continuous absorption indicated cyclic utilization of CD. The favorable role of CD was ascribed to facilitating the limiting step for the entire NO2 absorption–dissolution process which included both water solubility and gas–liquid mass transfer. Furthermore, we propose a potential mechanism of CD/sulfite mixed solution absorbing NO2, among which the favorable role of the additive is related to its amphiphilic behavior toward gas and liquid phases. Additionally, a kinetic model describing the rates of gas–liquid transfer and macro absorption was established based on various operating conditions. This model explains the absorption improvement in the kinetic aspect and provides theoretical guidance for practical applications.

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Experimental study on removal performance of SO2 and NOx in marine exhaust gas using seawater/urea peroxide solution and analysis of ions concentration change

Cited by 15 publications

References 18 publications

Ozone oxidation of nitric oxide: Promoting effect of phosphorus and inhibitory effect of phosphoric acid

Ozone oxidation of nitric oxide: Promoting effect of phosphorus and inhibitory effect of phosphoric acid

An investigation on the effects of organic additives on CO₂ capture performance of Na₂CO₃ solution

Mechanism and Kinetic Study of Cyclodextrin Use to Facilitate NO₂ Absorption in Sulfite Solutions

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Experimental study on removal performance of SO2 and NOx in marine exhaust gas using seawater/urea peroxide solution and analysis of ions concentration change

Cited by 15 publications

References 18 publications

Ozone oxidation of nitric oxide: Promoting effect of phosphorus and inhibitory effect of phosphoric acid

Ozone oxidation of nitric oxide: Promoting effect of phosphorus and inhibitory effect of phosphoric acid

An investigation on the effects of organic additives on CO2 capture performance of Na2CO3 solution

Mechanism and Kinetic Study of Cyclodextrin Use to Facilitate NO2 Absorption in Sulfite Solutions

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Product

Resources

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An investigation on the effects of organic additives on CO₂ capture performance of Na₂CO₃ solution

Mechanism and Kinetic Study of Cyclodextrin Use to Facilitate NO₂ Absorption in Sulfite Solutions