Experiment and Prediction Studies of Marine Exhaust Gas SO<sub>2</sub> and Particle Removal Based on NaOH Solution with a U-Type Scrubber

Zhou, Jinxi; Zhou, Song; Zhu, Yuanqing

doi:10.1021/acs.iecr.7b02397

Cited by 32 publications

(23 citation statements)

References 18 publications

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“…However, function (22) does not take the shape factor into consideration; in other words, the optimized scrubber may be too slender (like a pipe) or too wide. According to the existing applications, it is found that D 1 / H 2 can be used to describe the shape factor constraint and its proper range is 0.3–0.6 . Therefore, function (22) is modified as follows:

F (bold-italicGen e_{j}) = {\begin{array}{c} center & exp true(- \frac{π D_{1}^{2} H_{2}}{4} true), & 0.3 \leq \frac{D_{1}}{H_{2}} \leq 0.6 and η \geq 0.85 \\ center & 0, & \frac{D_{1}}{H_{2}} \leq 0.3 or \frac{D_{1}}{H_{2}} \geq 0.6 or η < 0.85 \end{array}

…”

Section: Resultsmentioning

confidence: 99%

“…The reaction of absorption can be simplified as the following chemical reaction equation, which is a pseudo‐first order reaction with a faster rate . The reaction enhancement factor, E , is determined by this function and is expressed by Equation :

S O_{2} (a q) + H_{2} O (l) + H C O_{3}^{-} (a q) \to H_{3} O^{+} (a q) + S O_{3}^{2 -} (a q) + C O_{2} (a q)

E = \frac{R_{S O_{2}} + R_{S O_{3}^{2 -}}}{R_{S O_{2}}}

where R is the molar flux of the species.…”

Section: Optimization Methodsmentioning

confidence: 99%

“…The reaction of absorption can be simplified as the following chemical reaction equation, which is a pseudo-first order reaction with a faster rate. [18] The reaction enhancement factor, E, is determined by this function and is expressed by Equation (13): [33] SO aq…”

Section: Cfd Simulation Models and Conditionsmentioning

confidence: 99%

“…However, literature concerning the application of seawater desulphurization in ships is still limited, and most of the studies that have been recorded focus on the optimization of the operation parameters. Only a few papers can be found that target the optimization of scrubber structure parameters . Conventional scaling‐up and optimization methods through experiments are too costly; however, the CFD method can simplify and accelerate this process.…”

Section: Introductionmentioning

confidence: 99%

“…Only a few papers can be found that target the optimization of scrubber structure parameters. [17][18][19] Conventional scaling-up and optimization methods through experiments are too costly; however, the CFD method can simplify and accelerate this process. Recently, significant progress has been made in the FGD mathematical model that is based on CFD.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Structure Optimization of Vessel Seawater Desulphurization Scrubber Based on CFD and SVM‐GA Methods

et al. 2019

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The miniaturization of the scrubber used in vessel flue gas desulphurization is a critical issue. In this study, the structure optimization of the vessel desulphurization scrubber based on CFD (computational fluid dynamics) and the SVM‐GA (support vector machine and genetic algorithm) is performed and a miniaturized scrubber design with the same desulphurization efficiency as large scrubbers is obtained. First, the seawater SO2 absorption process in a vessel desulphurization scrubber is investigated using the CFD‐DPM method, and the effects of the operating and structural parameters on the desulphurization efficiency η are discussed in detail. Results show that η is positively correlated to the absorption area height, H2, and the spray level number, N, and η first increases and then decreases with an increase in the scrubber diameter, D1, as well as the inlet flue angle, θ. Then, a prediction model of η considering D1, H2, θ, and N is established and validated using the SVM with the simulation data. Finally, D1, H2, θ, and N are optimized using the GA method based on the SVM model. The results show that the volume of the absorption area, Vab, can be reduced by 30 % while maintaining the same η through the use of this optimization method.

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F (bold-italicGen e_{j}) = {\begin{array}{c} center & exp true(- \frac{π D_{1}^{2} H_{2}}{4} true), & 0.3 \leq \frac{D_{1}}{H_{2}} \leq 0.6 and η \geq 0.85 \\ center & 0, & \frac{D_{1}}{H_{2}} \leq 0.3 or \frac{D_{1}}{H_{2}} \geq 0.6 or η < 0.85 \end{array}

…”

Section: Resultsmentioning

confidence: 99%

S O_{2} (a q) + H_{2} O (l) + H C O_{3}^{-} (a q) \to H_{3} O^{+} (a q) + S O_{3}^{2 -} (a q) + C O_{2} (a q)

E = \frac{R_{S O_{2}} + R_{S O_{3}^{2 -}}}{R_{S O_{2}}}

where R is the molar flux of the species.…”

Section: Optimization Methodsmentioning

confidence: 99%

Section: Cfd Simulation Models and Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Structure Optimization of Vessel Seawater Desulphurization Scrubber Based on CFD and SVM‐GA Methods

et al. 2019

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A cross‐flow rotating packed bed toward desulphurization of marine exhaust gas

Cai

Jia

et al. 2021

Can J Chem Eng

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The marine exhaust gas containing SO2 leads to serious impacts on human health and marine environments. Due to the strict emission standard of marine exhaust gas and the limited space of ships, desulphurization process intensification is urgent. Herein, a cross‐flow rotating packed bed (CF‐RPB) with a compact size was developed toward desulphurization of marine exhaust gas. According to the emission standards of different sea areas, the characteristics of simulated open seawater desulphurization (OSD) and closed alkali desulphurization (CAD) were systematically evaluated. The respective correlations for Kya of OSD and CAD were proposed to predict the height of CF‐RPB. The desulphurization efficiencies of 86% in the OSD and 97% in the CAD were achieved in a three‐stage CF‐RPB, satisfying the emission standard. Compared with the traditional spray tower, the CF‐RPB has a higher mass transfer coefficient with a smaller volume, which has great potential for desulphurization of marine exhaust gas.

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Energy‐saving glass‐melting‐furnace with semi‐dry plasma‐chemical hybrid process

Yamasaki

Nishioka

Fukuda

et al. 2023

Plasma Processes & Polymers

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A low‐cost plasma‐chemical hybrid process (PCHP) is proposed for simultaneous NOx and SOx treatment. PCHP can be integrated into existing desulfurization reactors by combining plasma oxidation and chemical reduction. PCHP is applied to glass melting furnace emissions with limited denitration technology, achieving higher removal efficiencies of NO, NOx, and SO2 (43%, 38%, and 28%, respectively) by optimizing reductant spray and installation angles. PCHP also improves fuel consumption, with a 0.04 increase in air ratio reducing energy consumption by 3.6 kL/day (equivalent to 6.6 t(CO2)/day reduction). In addition, PCHP allows for the collection and reuse of treated SO2 as sodium sulfate particles, making it a suitable aftertreatment technology for glass manufacturing exhaust.

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Experiment and Prediction Studies of Marine Exhaust Gas SO₂ and Particle Removal Based on NaOH Solution with a U-Type Scrubber

Cited by 32 publications

References 18 publications

Structure Optimization of Vessel Seawater Desulphurization Scrubber Based on CFD and SVM‐GA Methods

Structure Optimization of Vessel Seawater Desulphurization Scrubber Based on CFD and SVM‐GA Methods

A cross‐flow rotating packed bed toward desulphurization of marine exhaust gas

Energy‐saving glass‐melting‐furnace with semi‐dry plasma‐chemical hybrid process

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Experiment and Prediction Studies of Marine Exhaust Gas SO2 and Particle Removal Based on NaOH Solution with a U-Type Scrubber

Cited by 32 publications

References 18 publications

Structure Optimization of Vessel Seawater Desulphurization Scrubber Based on CFD and SVM‐GA Methods

Structure Optimization of Vessel Seawater Desulphurization Scrubber Based on CFD and SVM‐GA Methods

A cross‐flow rotating packed bed toward desulphurization of marine exhaust gas

Energy‐saving glass‐melting‐furnace with semi‐dry plasma‐chemical hybrid process

Contact Info

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Experiment and Prediction Studies of Marine Exhaust Gas SO₂ and Particle Removal Based on NaOH Solution with a U-Type Scrubber