Inhibiting oxidation and enhancing absorption characteristics of sodium sulfite for SO2 removal from the non-ferrous smelting flue gas

Yuan, Dongli; Zhang, Xiaojing; Qu, Zan; Huang, Wenjun

doi:10.4491/eer.2020.043

Cited by 3 publications

(3 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…S 2 O 3 2– can also inhibit the chain reaction. S 2 O 3 2– reacts with • SO 3 – to generate • S 2 O 3 – , and further generates inert substances, as shown in eqs – . The effect of Na 2 S 2 O 3 on the circulating Na 2 SO 3 absorption system was studied.…”

Section: Absorbent Evaluationmentioning

confidence: 99%

“…, and further generates inert substances, as shown in eqs R18−R20. 45 The effect of Na 2 S 2 O 3 on the circulating Na 2 SO 3 absorption system was studied. The intrinsic oxidation kinetics results showed that the reaction order of Na 2 S 2 O 3 was −2.22, and the reaction order of Na 2 SO 3 was 2.393.…”

Section: Reducing the Degree Of Oxidation In Sodium-based Buffer Solu...mentioning

confidence: 99%

See 1 more Smart Citation

An Overview of Flue Gas SO₂ Capture Technology Based on Absorbent Evaluation and Process Intensification

Xie,

Wang,

Liu

et al. 2024

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Highly efficient and low-energy SO 2 capture technology is a key measure to control SO 2 pollution and sulfur supply side and demand-side balancing. This paper reviews the current development of SO 2 capture technology by chemical absorption from two aspects of absorbent and process enhancement. The SO 2 absorption mechanism of various absorbents are first described, and it was divided into aqueous solvents and nonaqueous solvents. Four prediction models for the SO 2 absorption capacity of different absorbents are proposed, providing an effective tool for the selection of efficient and low-energy absorbents. The advantages, bottlenecks, and development directions of each absorbent are analyzed. The diversity of organic amines provides a possibility for enhancing the market competitiveness of organic amine aqueous solutions in aqueous solvents, while the high energy consumption in the absorbent regeneration process is a disadvantage. The ionic amino acid aqueous solution reduces the volatilization of the effective components of the absorbent and has better SO 2 absorption potential than the organic amine aqueous solution. The greatest advantage of the nonaqueous solvents is the avoidance of ineffective latent heat consumption. High-throughput screening has become a bridge for the application of aqueous and nonaqueous solvents to industrial SO 2 capture processes. Finally, the application potential of a process intensification strategy in SO 2 capture technology is discussed, in which solvent intensification can avoid latent heat consumption, equipment intensification can improve the efficiency of gas−liquid mass transfer and process matching can recover the available energy of SO 2 capture system. The comprehensive evaluation of SO 2 capture process based on various absorbents is the primary task to promote the development of promising absorbents. It is hoped that this paper can provide reference for the development of SO 2 capture processes.

show abstract

Section: Absorbent Evaluationmentioning

confidence: 99%

Section: Reducing the Degree Of Oxidation In Sodium-based Buffer Solu...mentioning

confidence: 99%

An Overview of Flue Gas SO₂ Capture Technology Based on Absorbent Evaluation and Process Intensification

Xie,

Wang,

Liu

et al. 2024

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…The ion chromatography analysis results suggest that the increase in O 2 concentration led to an increase in the oxidation of SO as shown in Eq. (10-12)[25][26][27]. Therefore, the increased HSO 3…”

mentioning

confidence: 98%

Effect of organic additives on NO2 removal in the simultaneous absorption of SO2 and NO2 into limestone slurry

Jeong,

Cho,

Lee

2023

Environmental Engineering Research

View full text Add to dashboard Cite

When SO2 and NO2 are simultaneously absorbed into limestone slurry, the SO32- (including HSO3 -) ions formed by the hydrolysis of SO2 enhance the absorption rate of NO2. However, NO2 absorption decreases due to the oxidation of SO32- in the presence of O2. To address this issue, simultaneous absorption was performed by adding organic additives: formic, acetic, propionic acid, monoethanolamine (MEA), diethanolamine (DEA), and triethanolamine (TEA). These limestone slurries were denoted FS, AS, PS, MS, DS, and TS, respectively. As the acidity of the organic acid increases, SO32- oxidation inhibition also increases. Accordingly, the denitrification rate of the slurries with added organic acid was in the order of PS < AS < FS. SO32- oxidation inhibition by the ethanolamine additives increased with the number of 2-hydroxyethyl. The denitrification rate within 50 min of reaction was in the order of MS < TS < DS, which is attributed to the basicity and SO32- oxidation inhibition by ethanolamine. The denitrification rate after 50 min of the reaction was in the order of MS < DS < TS, which is presumed to be the result of SO32- oxidation inhibition and degradation due to the CO2 absorption rate.

show abstract

Buffer effect of MgO on Na2SO3 to stabilize S(IV) for the enhancement in simultaneous absorption of NOx and SO2 from non-ferrous smelting gas

Huang

Wang³

et al. 2022

Environ Sci Pollut Res

View full text Add to dashboard Cite

Inhibiting oxidation and enhancing absorption characteristics of sodium sulfite for SO2 removal from the non-ferrous smelting flue gas

Cited by 3 publications

References 27 publications

An Overview of Flue Gas SO₂ Capture Technology Based on Absorbent Evaluation and Process Intensification

An Overview of Flue Gas SO₂ Capture Technology Based on Absorbent Evaluation and Process Intensification

Effect of organic additives on NO<sub>2</sub> removal in the simultaneous absorption of SO<sub>2</sub> and NO<sub>2</sub> into limestone slurry

Buffer effect of MgO on Na2SO3 to stabilize S(IV) for the enhancement in simultaneous absorption of NOx and SO2 from non-ferrous smelting gas

Contact Info

Product

Resources

About

Inhibiting oxidation and enhancing absorption characteristics of sodium sulfite for SO2 removal from the non-ferrous smelting flue gas

Cited by 3 publications

References 27 publications

An Overview of Flue Gas SO2 Capture Technology Based on Absorbent Evaluation and Process Intensification

An Overview of Flue Gas SO2 Capture Technology Based on Absorbent Evaluation and Process Intensification

Effect of organic additives on NO<sub>2</sub> removal in the simultaneous absorption of SO<sub>2</sub> and NO<sub>2</sub> into limestone slurry

Buffer effect of MgO on Na2SO3 to stabilize S(IV) for the enhancement in simultaneous absorption of NOx and SO2 from non-ferrous smelting gas

Contact Info

Product

Resources

About

An Overview of Flue Gas SO₂ Capture Technology Based on Absorbent Evaluation and Process Intensification

An Overview of Flue Gas SO₂ Capture Technology Based on Absorbent Evaluation and Process Intensification