Reversible and Efficient Absorption of SO<sub>2</sub> with Natural Amino Acid Aqueous Solutions: Performance and Mechanism

Wang, Hao; Wu, Peng; Li, Changyong; Zhang, Jianshu; Deng, Renpan

doi:10.1021/acssuschemeng.1c08186

Cited by 15 publications

(9 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results further prove that a low concentration of SO 2 exists in EG–Im–MTPB (1:2:1) DES by chemical absorption. According to the results, the SO 2 absorption process can be exhibited by eqs and , where SO 2 (g) and SO 2 (l) are the gaseous and liquid states, K represents the chemical equilibrium constant, and DES–SO 2 (phys) and DES–SO 2 (chem) represent the physical and chemical absorption of SO 2 by DES.…”

Section: Resultsmentioning

confidence: 99%

Superefficient Absorption of Low-Concentration SO₂ in Flue Gas Using New Ternary Imidazole-Based Deep Eutectic Solvents: Mechanism, Thermodynamics, and Process Analysis

et al. 2022

View full text Add to dashboard Cite

New ternary deep eutectic solvents (DESs), including imidazole (Im), ethylene glycol (EG), and methyltriphenyl phosphonium bromide (MTPB), were synthesized at different molar ratios to absorb SO 2 in flue gas. Excitingly, the EG−Im−MTPB (1:2:1) DES has achieved the unexpected achievement of its absorption capacity being greatly improved to 0.65 g of SO 2 /g of DES (4.43 mol/mol) at 3000 ppm and 30 °C, which is the best performing DES for capturing SO 2 under the same conditions ever reported. The aftereffects of thermodynamic investigation demonstrate that there is a solid compound communication between EG−Im−MTPB (1:2:1) DES and SO 2 . In particular, the enthalpy change (Δ r H m ), entropy change (Δ r S m ), and Gibbs free energy change (Δ r G m ) were plainly determined as −50.45 kJ/mol, −114.57 J mol −1 K −1 , and −16.20 kJ/mol, separately. The Fourier transform infrared, 1 H nuclear magnetic resonance, and quantum chemistry calculation results confirm that multiple active sites, including the N atom of Im and the Br atom of MTPB, are the main factors by which DES effectively absorbs SO 2 . Further, a UNIQUAC method by Aspen Plus V12 is set up for the SO 2 absorption process with 6000 m 3 /h flue gas, indicating that the EG− Im−MTPB (1:2:1) DES can completely absorb SO 2 in the flue gas when the consumption of DES is 26.8 m 3 /h.

show abstract

Section: Resultsmentioning

confidence: 99%

Superefficient Absorption of Low-Concentration SO₂ in Flue Gas Using New Ternary Imidazole-Based Deep Eutectic Solvents: Mechanism, Thermodynamics, and Process Analysis

et al. 2022

View full text Add to dashboard Cite

show abstract

“…In fact, when SO 2 dissolves in water, different sulfur-containing compounds such as SO 2 , HSO 3 − , (OH)SO 2 − , and S 2 O 5 2− may coexist in water. Therefore, Wang et al 20 studied the interaction between amino acid and SO 2 and its different forms of sulfur-containing compounds using 20 natural amino acid aqueous solutions. Taking Gly aqueous solution as an example, the reaction mechanism of Gly aqueous solution absorbing SO 2 is proposed as shown in Figure 5 (R29)…”

Section: Evaluation Of Organic Amine Aqueous Solutionsmentioning

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

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

“…Then, the results of SO 2 absorption by ChCl/DETA/EG ternary DESs at 298.15 K and 1.0 bar were studied and shown in Figure a. For ChCl/DETA/EG ternary DESs, an absorption capacity of 0.87 g/g is received with a molar ratio of 1:1:2, exhibiting a superior SO 2 uptake capability compared to other reported works. ,− For DES with a lower EG molar ratio, a decreased SO 2 absorption capacity is viewed (0.77 g/g). The increased viscosity of this DES should be the barrier to its capture of SO 2 .…”

mentioning

confidence: 92%

Facile Synthesis of Alkaline Ternary Deep Eutectic Solvents: Application for Effective and Reversible SO₂ Uptake

Wang

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

Effective capture and recycling of SO2 are of great significance to environmental protection and high-value utilization. Herein, a promising strategy for effective and reversible capture of SO2 was proposed using alkaline ternary deep eutectic solvents (DESs) as absorbents. The absorbents consisting of choline chloride (ChCl), diethylenetriamine (DETA), and ethylene glycol (EG) with different molar ratios show a relatively lower viscosity and higher thermal stability. Here, ChCl/DETA/EG (1:1:2) could take out 0.87 g of SO2/g of solvent at 298.15 K and 1.0 bar. Surprisingly, a SO2 absorption capacity of 0.53 g/g could still be gained under a lower SO2 partial pressure (0.2 bar). Besides, the prepared absorbents also exhibit rapid equilibration time and satisfied reusability, providing a potential alternative strategy for the effective and reversible elimination of SO2.

show abstract

Reversible and Efficient Absorption of SO₂ with Natural Amino Acid Aqueous Solutions: Performance and Mechanism

Cited by 15 publications

References 45 publications

Superefficient Absorption of Low-Concentration SO₂ in Flue Gas Using New Ternary Imidazole-Based Deep Eutectic Solvents: Mechanism, Thermodynamics, and Process Analysis

Superefficient Absorption of Low-Concentration SO₂ in Flue Gas Using New Ternary Imidazole-Based Deep Eutectic Solvents: Mechanism, Thermodynamics, and Process Analysis

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

Facile Synthesis of Alkaline Ternary Deep Eutectic Solvents: Application for Effective and Reversible SO₂ Uptake

Contact Info

Product

Resources

About

Reversible and Efficient Absorption of SO2 with Natural Amino Acid Aqueous Solutions: Performance and Mechanism

Cited by 15 publications

References 45 publications

Superefficient Absorption of Low-Concentration SO2 in Flue Gas Using New Ternary Imidazole-Based Deep Eutectic Solvents: Mechanism, Thermodynamics, and Process Analysis

Superefficient Absorption of Low-Concentration SO2 in Flue Gas Using New Ternary Imidazole-Based Deep Eutectic Solvents: Mechanism, Thermodynamics, and Process Analysis

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

Facile Synthesis of Alkaline Ternary Deep Eutectic Solvents: Application for Effective and Reversible SO2 Uptake

Contact Info

Product

Resources

About

Reversible and Efficient Absorption of SO₂ with Natural Amino Acid Aqueous Solutions: Performance and Mechanism

Superefficient Absorption of Low-Concentration SO₂ in Flue Gas Using New Ternary Imidazole-Based Deep Eutectic Solvents: Mechanism, Thermodynamics, and Process Analysis

Superefficient Absorption of Low-Concentration SO₂ in Flue Gas Using New Ternary Imidazole-Based Deep Eutectic Solvents: Mechanism, Thermodynamics, and Process Analysis

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

Facile Synthesis of Alkaline Ternary Deep Eutectic Solvents: Application for Effective and Reversible SO₂ Uptake