Simultaneous removal of SO2 and NO using a spray dryer absorption (SDA) method combined with O3 oxidation for sintering/pelleting flue gas

Cai, Maoyu; Liu, Xiaolong; Zhu, Tong; Zou, Yang; Tao, Wenliang; Tian, Mengkui

doi:10.1016/j.jes.2020.04.018

Cited by 21 publications

(3 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The NO concentration in industrial sinter flue gas is often variable due to the uneven distribution of fossil-fuel nitrogen and incomplete combustion [51]. The different sinter raw mix and ratio also affect NO emission [52]. Herein, the influence of NO initial concentration on NOx removal was investigated, and the results are shown in Figure 8.…”

Section: Investigation Of No Initial Concentrationmentioning

confidence: 99%

Collaborative Effect of In-Plasma Catalysis with Sequential Na2SO3 Wet Scrubbing on Co-Elimination of NOx and VOCs from Simulated Sinter Flue Gas

Li,

Zhao,

Sun

et al. 2023

Processes

View full text Add to dashboard Cite

Sinter flue gas produced by the iron-ore sinter process in steel plants is characterized by a large gas volume and complex components. Among the major air pollutants, preliminary emissions of volatile organic compounds (VOCs) and nitrogen oxides (NOx) exhibit an inevitable contribution to secondary aerosol and ozone formation. Herein, oxidation–absorption collaborative technology for in-plasma catalysis with sequential Na2SO3 wet scrubbing, aiming at co-elimination of NOx and VOCs from sinter flue gas, is proposed. Experimental parameters, including plasma discharge status, NO initial concentration, gas feed flux, Na2SO3 concentration, pH value, and absorption ions, were systematically investigated. The VOC and NOx removal performance of the integrated system was further investigated by taking simulated sinter flue gas as model pollutants. The results showed that the collaborative system has satisfactory performance for TVOC and NO removal rates for the effective oxidation of in-plasma catalysis and Na2SO3 absorption. The integration of plasma catalysis with Na2SO3 scrubbing could be an alternative technology for the co-elimination of sinter flue gas multi-compounds.

show abstract

Section: Investigation Of No Initial Concentrationmentioning

confidence: 99%

Collaborative Effect of In-Plasma Catalysis with Sequential Na2SO3 Wet Scrubbing on Co-Elimination of NOx and VOCs from Simulated Sinter Flue Gas

Li,

Zhao,

Sun

et al. 2023

Processes

View full text Add to dashboard Cite

show abstract

“…In addition, de-NOx was unaffected by the concentration of NaOH, and because the SO concentration of 1.0% was sufficient for NOx removal, the removal efficiency was 574% regardless of the concentration of NaOH. When there is little to no SO in the spray liquid, the lack of NaOH leads to SO2 dissolving in water to become HSO , and the reaction of NO2 and HSO converts NO2 to NO (Cai et al, 2020). Because of this, de-NOx does not decrease significantly, even when there is a lack of sulfite.…”

Section: Effect Of Naoh Concentration and Concentration On Simultaneomentioning

confidence: 99%

Performance evaluation of semi-dry flue gas desulfurization and denitration from flue gas of a glass melt using nonthermal plasma combined process

Yamasaki

Mizuguchi

Maeda

et al. 2021

Mechanical Engineering Journal

View full text Add to dashboard Cite

The semi-dry plasma and chemical hybrid process (PCHP) has been used for the simultaneous removal of NO x and SO x emitted from a glass melting furnace. In this study, PCHP was conducted through a laboratory-scale model experiment that simulated the aftertreatment system of a full-scale semi-dry glass bottle manufacturing system. The process consisted of two methods: the plasma process in which NO is oxidized using nonthermal plasma and the chemical process in which NO 2 produced from NO oxidation is removed using Na 2 SO 3 resulting from the reaction between SO 2 and NaOH. Herein, the position of ozone injection was transferred to the inside wall of the reactor to improve the efficiency of simultaneous denitrification and desulfurization through the efficient oxidation of NO. First, NO removal experiments were conducted by changing the spray position, spray liquid flow rate, and flow rate of a mixed simulated gas of NO and SO 2. Therefore, over the gas flow rate range from 5 to 15 L/min, the localized cooling area where NO and O 3 could be efficiently reacted at the nozzle spray position of z = 400 mm was formed. A NO x removal efficiency of 74% with a ratio of decreased NO to injected O 3 (ΔNO/O 3) of 88% and SO 2 removal efficiency of 100% were achieved by injecting O 3 from the inside wall of the reactor when the liquid-gas ratio was 1.17 L/m 3 .

show abstract

“…However, WFGD generates a large amount of desulfurization wastewater, the treatment of which involves the use of complex equipment and high economic cost [3]. Compared to WFGD, the SDA and DSI techniques have lower energy consumption and better fuel economy [4]. The desulfurization efficiency of the SDA technique has reached more than 90 %, there are no scaling and corrosion problems, and the water consumption is relatively low, requiring less space [5].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Desulfurization Characteristics of Dry Sorbent Injection at Low SO₂ Concentrations

Liu,

Song,

Kang

et al. 2024

Chem Eng & Technol

View full text Add to dashboard Cite

To effectively reduce SO2 emissions, flue gas desulfurization methods are widely used in coal‐fired power plants. In desulfurization, the dry sorbent injection (DSI) technology has the advantages of high desulfurization efficiency, simple operation, convenient adjustment, and low initial investment. Here, a pilot‐scale experimental system was designed and built to investigate the desulfurization characteristics of the DSI technology. The influence of the residence time of the desulfurizer, the reaction temperature, the stoichiometric ratio of the desulfurization reaction, the particle size of the desulfurizer, the inlet SO2 concentration, the dust concentration, and the water vapor content in the flue gas on the desulfurization efficiency at low SO2 concentrations was studied by injecting NaHCO3 into the pipeline. The desulfurization efficiency can be significantly improved by reducing the desulfurizer particle size or increasing the water vapor content in the flue gas at low SO2 concentration. An empirical formula describing the dependence of the desulfurization efficiency on experimental parameters is given.

show abstract

Simultaneous removal of SO2 and NO using a spray dryer absorption (SDA) method combined with O3 oxidation for sintering/pelleting flue gas

Cited by 21 publications

References 30 publications

Collaborative Effect of In-Plasma Catalysis with Sequential Na2SO3 Wet Scrubbing on Co-Elimination of NOx and VOCs from Simulated Sinter Flue Gas

Collaborative Effect of In-Plasma Catalysis with Sequential Na2SO3 Wet Scrubbing on Co-Elimination of NOx and VOCs from Simulated Sinter Flue Gas

Performance evaluation of semi-dry flue gas desulfurization and denitration from flue gas of a glass melt using nonthermal plasma combined process

Experimental Study on Desulfurization Characteristics of Dry Sorbent Injection at Low SO₂ Concentrations

Contact Info

Product

Resources

About

Simultaneous removal of SO2 and NO using a spray dryer absorption (SDA) method combined with O3 oxidation for sintering/pelleting flue gas

Cited by 21 publications

References 30 publications

Collaborative Effect of In-Plasma Catalysis with Sequential Na2SO3 Wet Scrubbing on Co-Elimination of NOx and VOCs from Simulated Sinter Flue Gas

Collaborative Effect of In-Plasma Catalysis with Sequential Na2SO3 Wet Scrubbing on Co-Elimination of NOx and VOCs from Simulated Sinter Flue Gas

Performance evaluation of semi-dry flue gas desulfurization and denitration from flue gas of a glass melt using nonthermal plasma combined process

Experimental Study on Desulfurization Characteristics of Dry Sorbent Injection at Low SO2 Concentrations

Contact Info

Product

Resources

About

Experimental Study on Desulfurization Characteristics of Dry Sorbent Injection at Low SO₂ Concentrations