INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Junhai Zhao,Shuhang Ren,Yucui Hou,Kai Zhang,Weize Wu
Task-specific ionic liquids (TSILs) have been widely observed to effectively absorb low-concentration SO2 from flue gas by chemical interaction. However, the interaction between SO2 and TSILs is still unclear. The addition of solvents can decrease the viscosity of TSILs and promote mass transfer, but whether the solvents have an impact on absorption is unknown, as is the effect on absorption mechanism. To solve these issues, we synthesized several types of TSILs containing carboxylate anion to capture SO2 from simulated flue gas. The mechanism of absorption of SO2 by the TSILs was investigated in detail using Fourier transform infrared (FT-IR), 1H nuclear magnetic resonance (NMR), and 13C NMR. The results show that chemical interactions can be found between the carboxylate anions of TSILs and SO2. Simultaneously, the effect of several solvents on SO2 absorption capacity of TSILs was studied. The results indicate that ethylene glycol (EG) in TSILs has a strong influence on SO2 absorption by guanidinium- and alkanolaminium-based TSILs, but for quaternary ammonium-based TSILs, EG has no effect. Finally, the interaction between EG and TSILs was investigated by FT-IR, and the absorption mechanism was studied. It has been found that the addition of EG can improve the basicity of guanidinium- and alkanolaminium-based TSILs to increase the absorption capacity.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2018
·
IF 3.741
Minjie Li,Zelai Zheng,Liwei Sun,Ying Ling,Shifang Luan,Haoyu Tang
SO 2 -responsive homopolypeptide with tri(ethylene glycol), 1,2,3-triazole linkages and N -butylimidazolium iodide pendants ( P4 ) were prepared by the ring-opening polymerization of γ- 2-(2-(2-chloroethoxy)ethoxy)ethyl- l -glutamic acid based N -carboxyanhydride then post-polymerization to the side-chain, by the nucleophilic substitution of the chloro group in the presence of NaN 3 , followed by the copper-mediated 1,3-dipolar cycloaddition, and subsequent ion-exchange reaction. 1 H NMR analysis revealed that SO 2 interacted with 1,2,3-triazole group leading to polymer aggregation. The P4 /SO 2 aqueous solution is multi-responsive that can be triggered by gas (N 2 /SO 2 ), temperature, and oxidation (i.e., H 2 O 2 ). Poly(vinyl alcohol) (PVA) hydrogel modified by P4 and BaSO 3 particles were prepared, the resulting hydrogel showed improved mechanical properties in terms of both stiffness and toughness.
研究领域:
材料科学
·
化学
·
生物材料
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Lingyue Liu,Peng Zhou,Xiaozhi Su,Yuhang Liu,Yuhan Sun,Hongbin Yang,Heyun Fu,Xiaolei Qu,Shantang Liu,Shourong Zheng
Monitoring sulfur dioxide (SO 2 ) in the environment requires a sensor to feature adequate sensitivity, selectivity, and low detection levels. Herein, we report an ultrasensitive, low-concentration SO 2 gas sensor that employs single atoms nickel anchored on oxygen vacancy-rich SnO 2 nanorods (SAC-Ni/H-SnO 2 ) as the sensing material. The response value of the SAC-Ni/H-SnO 2 sensor to 20 ppm SO 2 is 48, and the detection limit is 100 ppb, which is superior to most of reported SO 2 sensors. In-situ DRIFTS and ESR characterization shows that the coupling effects of SAC-Ni and adjacent oxygen vacancy on SnO 2 surface, which promote the adsorption of SO 2 and activation of chemisorbed oxygen, respectively. This effective single-atom catalyst provides a new insight into complex gas sensing mechanisms and demonstrates a promising approach of using single-atom catalysts for gas sensing applications.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Hao Wang,Peng Wu,Changyong Li,Jianshu Zhang,Renpan Deng
In previous research, we have found and reported for the first time that β-alanine aqueous solution could be employed to efficiently separate SO2 from flue gas. However, the performance of most natural amino acids (AAs) on SO2 absorption and their interaction mechanisms are not fully understood. In this work, the performance of 20 natural AA aqueous solutions on SO2 absorption from flue gas was systematically studied. The experimental data showed that monoamino AAs (MAAs) exhibited good absorption performance, especially glycine, of which the saturation uptake of SO2 reached 0.461 g/g. All the MAAs showed excellent regeneration performance, while the polyamino AAs of lysine, arginine, and histidine performed poorly. Based on the characterization and analysis using Fourier transform infrared spectroscopy, Raman spectroscopy, 13C-nuclear magnetic resonance, and the density-functional theory simulation, it was found that the interaction mechanism between MAA aqueous solutions represented by glycine and SO2 is complex, including the hydrolysis of SO2 and the protonation of MAAs, the formation of hydrogen bonds between cationic MAAs and HSO3–, and the interaction between zwitterionic MAAs and SO2. In addition, cationic glycine could form a carboxylic acid dimer, which further interacted with HSO3– through hydrogen bonds.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2023
·Vol. 15
·期 29
·3522-3531
·
IF 3.1
Keqin Mi,Liping Tong,Min Yu,Yue Zhao,Hao Dong,Shifeng Hou
Sulfur dioxide (SO2) is a common atmospheric pollutant. Currently, most of the detection methods are based on chemical reactions and optical absorption principles. However, these methods have some limitations in their detection range and accuracy, especially in complex environments. In this work, sulfur dioxide was absorbed by an ionic liquid, and a new electrochemical sensor based on 3D-rGO/CB was developed for electrochemical detection. Specifically, carbon black (CB) nanoparticles were incorporated with graphene oxide (GO) sheets using spray drying technology to form a highly porous and interconnected 3D-GO/CB microsphere structure. Then, the 3D-rGO/CB/GCE electrochemical sensor was fabricated by electrochemical reduction of the composite material onto a glassy carbon electrode (GCE) surface and used to detect sulfur dioxide in ionic liquids. The results demonstrated that the sensor had excellent conductivity and mass transfer preferable performance catalytic activity for SO2 in ionic liquids, and a linear detection range of 100–3500 ppm. Besides, the detection limit was 52.3 ppm (S/N = 3). Moreover, it had high selectivity, stability, and repeatability. This work significantly contributed to the development of advanced electrochemical sensors with improved performance for detecting SO2 in ionic liquids and has a potential application prospect in the field of electrochemical gas detection.
研究领域:
材料科学
·
环境科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Min Zheng,Mingzhen Shi,Xingbang Hu,Zhuoheng Tu,Youting Wu
Efficient separation and recovery of hydrogen chloride (HCl) from HCl tail gas containing impurities such as sulfur dioxide (SO 2 ) is very important from the viewpoint of economy and environment. However, due to the similar dissolution ability of SO 2 and HCl , most solvents, including organic solvents, ionic liquids and deep eutectic solvents (DESs), show low SO 2 /HCl selectivity near 1.0 and are thus incompetent to separate SO 2 /HCl. To address this, we firstly reported the task-specific design of a novel class of protic metal-based DESs (PM-DESs) containing hydrochloride, metal chloride and sulfolane, which have good SO 2 affinity but much inhibited HCl uptake, for the separation of HCl/SO 2 . The solubility data of SO 2 and HCl in PM-DESs were determined and correlated by Krichevsky-Пiinskaya (K-I) equation. Among these PM-DESs, N,N -dimethylaniline hydrochloride (DMA·HCl) + zinc chloride (ZnCl 2 ) + sulfolane exhibits satisfactory recyclability and selectivity up to 2.669 (100 kPa, 313.2 K), which is the highest value reported so far. Absorption of HCl/SO 2 (50/50) mixed gas was also tested, with a high SO 2 /HCl selectivity of 3.250 obtained. In addition, the NMR and FTIR spectroscopic characterizations paired with quantum chemistry calculation were utilized to investigate the absorption mechanism from the perspective of atomic level. The DESs developed in the present work have the potential to separate and recycle HCl from SO 2 owing to their good selectivity and desirable reversibility, and the strategy proposed in this work may offer new guidance for designing green media for HCl recovery.
研究领域:
化学工程
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Wenze Zhang,Yukun Duan,Xiaopeng Chi,Wen Tan,Wei Weng,Shuiping Zhong
In the zinc production industry using Mn-rich zinc ore, substantial quantities of anodic slime are generated during electrolytic zinc production, containing ∼ 40 % Mn and ∼ 3 % Pb. While a valuable secondary resource, this material poses environmental risks as solid waste. Conventional reductive leaching methods rely on costly reductants and generate high carbon emissions. This study introduces a process utilizing flue gas from zinc plants as a reductant, achieving 92 % Mn leaching efficiency while simultaneously extracting 25 % Sr and fixing 92 % SO 2 as sulfate in solution. Kinetic analysis shows a mixed control model with an activation energy of 13.83 kJ/mol, with reaction rates further enhanced by optimizing gas inlet design. The MnSO 4 -rich leachate is processed into battery-grade MnSO 4 powder, and Sr is recovered as SrCO 3 , suitable for use as an additive in electrolytic zinc processes. Additionally, NaOH consumption for flue gas desulfurization decreases significantly from 2.14 kg to 0.17 kg per Nm 3 . Economic evaluation indicates reagent costs represent only 2 % of the total value of MnSO 4 and SrCO 3 products, offering a sustainable pathway for anodic slime utilization and SO 2 mitigation in zinc smelting.
研究领域:
冶金工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2017
·
IF 4.162
Zhuo Ye,Chong Duan,Ruilong Sheng,Junchao Xu,Hongying Wang,Lintao Zeng
Monitoring sulfur dioxide (SO 2 ) derivatives in environment is of great significance due to their harmful effects to the environment and human health. In this study, a fluorescent probe ( CZBT ) for SO 2 derivatives was prepared from 9-ethyl-9 H -carbazole-3,6-dicarboxaldehyde and 2-methyl-benzothiazolium, which displayed a noticeable color change from yellow to colorless along with a remarkable fluorescence change from yellow to blue in response to HSO 3 − . The probe could quantitatively determine the concentration of HSO 3 − with excellent selectivity, high sensitivity and low limit of detection. 1 H NMR and HR-MS spectra demonstrated that a selective 1, 4-nucleophilic addition occurred on the bridge double bond in CZBT . The probe was successfully used to determine the SO 2 derivatives in several real water samples with good recovery. Furthermore, the probe was employed for monitoring the level of intracellular HSO 3 − in HeLa (human cervical cancer) cells by fluorescence imaging. These results indicated that CZBT has a good capability for monitoring SO 2 derivatives in environment and living cells.
研究领域:
分析化学
·
环境科学
·
生物医学
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Bo Wang,Jing Chen,Jinyu Wang,Zhiyong Xu,Wenbo Zhao
The high viscosity of ionic liquids (ILs) and the poor thermal stability of deep eutectic solvents (DESs) limit their application in the real industry of SO 2 removal. Amine alkyl organosilicon can be considered as a potential candidate owing to its excellent physicochemical properties, desulfurization performance, and low regeneration sensible heat. In this work, an amine alkyl organosilicon, namely N-butyl-N-((methyldiphenylsilyl)methyl) butan-1-amine (BMMBA), characterized by low viscosity and high thermal stability, was innovatively synthesized. Dynamic absorption experiments show that BMMBA exhibits high SO 2 absorption capacity and excellent SO 2 /CO 2 selectivity. In addition, the absorption mechanism was revealed by quantum chemical (QC) calculation and molecular dynamics (MD) simulations. The consistency between experiments and theoretical calculation indicates that SO 2 interacts mainly with the N atom and benzene group of BMMBA. Further, thermodynamic analysis reveals that BMMBA displays exceptionally steep gradient of absorption capacity curves with temperature variations, which arise from an extremely negative absorption entropy change (Δ S ), favoring the reduction of regeneration sensible heat energy consumption. Ultimately, the optimization results suggest that the BMMBA system has a lower sensible heat of regeneration compared to conventional absorbents. The novel absorbent and investigate conclusions demonstrated herein could provide a theoretical basis for designing highly effective SO 2 absorbents.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zhicheng Liu,Manli Wang,Ming Hou,Yun Zhao,Wenbin Yang,Yangkai Han,Zhigang Shao
In traditional CO 2 electrolysis systems, oxygen evolution reaction (OER) consumes 90 % of the electricity input, whereas the product of oxygen holds minimal value. Moreover, the use of different electrocatalysts for the anode and cathode remains a challenge due to high capital costs of the electrolysis system. Substituting the OER with thermodynamically advantageous value-added anodic reactions and developing bifunctional electrocatalysts are crucial for the advancement of CO 2 electrolysis. In this study, for the first time, we present an innovative CO 2 electrolysis system that integrates CO 2 electroreduction reaction (CO 2 RR) with SO 2 electrooxidation reaction (SO 2 OR) and employ Ni-N-C as the bifunctional electrocatalysts to produce CO and H 2 SO 4 simultaneously. Notably, the novel CO 2 electrolysis system can reduce the cell voltage by 1.05 V, resulting in nearly 50 % reduction in energy consumption. This is also the first attempt to use Ni-N-C to catalyze SO 2 OR, showing markedly superior performance compared to commercial 20 % Pt/C. In-situ ATR-SEIRAS and DFT calculations demonstrate that the NiN 4 sites in Ni-N-C catalysts augment the direct conversion of *SO 2 to *HSO 4 - , identified as the rate-determining step for the SO 2 OR. This work provides guidance for the design of novel CO 2 electrolysis systems, the construction of bifunctional electrocatalysts, as well as the mechanistic investigation of the SO 2 OR.
研究领域:
化学工程
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 11
·1-16
·
IF 2.4
Yao Liang,Wang Hao,Li Shuangde,Chen Yunfa
Sulfur dioxide (SO 2 ) emissions, a major source of air pollution, can be effectively mitigated through catalytic reduction to elemental sulfur using carbon monoxide (CO). In this study, Fe loaded TiO 2 catalysts were synthesized and subsequently subjected to pre-sulfurization treatment under varied conditions. Their catalytic performance was evaluated in SO 2 reduction for thermal and dielectric barrier discharge (DBD) plasma enhanced thermal catalysis. The results showed that OFS-Fe/TiO 2 catalyst with oxygen-free sulfurization (OFS) treatment exhibited the highest catalytic activity, achieving above 90% SO 2 conversion between 250 and 550 °C under oxygen-assisted reaction (OAR), along with long-term stability under 40–60% water vapor. However, the SO 2 conversion were below 20% for Fe/TiO 2 and oxygen-assisted sulfurization OAS-Fe/TiO 2 catalysts within 250 to 400 °C. Notably, the significantly enhanced catalytic performance of the OFS-Fe/TiO 2 catalyst was probably attributed to the high dispersion of Fe over nano-TiO 2 , the lower Fe 2+ /Fe 3+ ratio, and the formation of active FeS 2 species detected by SEM-EDS, XPS and TPD techniques. Furethermore, a conversion efficiency exceeding 90% was maintained throughout 80 to 550 °C under DBD plasma reaction over POFS-Fe/TiO 2 catalyst with room-temperature DBD plasma oxygen-free sulfurization treatment, surpassing thermal catalysis performance. The significantly enhanced low-temperature activity of plasma catalysis was attributed to the lowest Fe 2+ /Fe 3+ ratio, together with the transformation of FeS 2 into FeS, generating more sulfur vacancies. In-situ DRIFTS experiments confirmed two distinct SO 2 adsorption and reduction mechanisms between Fe/TiO 2 and OFS-Fe/TiO 2 catalysts. The results demonstrate that pre-sulfurization and plasma modification serve as an effective catalytic strategy to enhance CO-mediated SO 2 reduction, offering a sustainable emission control approach through sulfur resource utilization. Graphical
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Guodong Xu,Junlian Wang,Fei Xu,Guoyong Huang,Shengming Xu,Bin Wu
It is imperative to recover the valuable components of spent HPCs. We have proposed a hydrometallurgical process and recovered 99.9% of V, 99.9% of Mo, and 95% of Al in our previous work. In this study, we focused on the Co and Ni recovery from the alkaline leaching residue of spent HPCs. We characterized the leaching residue by SEM-EDS, XPS, TGA, Laser Particle Size Analyzer, and ICP-OES. The Ni and Co leaching rates both reached around 95% with 2.0 mol/L H 2 SO 4 at 120 °C for 75 min. The impurity of Al in the leachate was removed via solvent extraction with 30% P204 at A/O of 1 and pH equilibrium of 2.0. The Co and Ni in the raffinate was separated via two stages of counter-current extraction with 20% Cyanex 272 at A/O of 1 and pH equilibrium of 5.7. The CoSO 4 and NiO products were characterized by XRD, and there are no impurity peaks. We also did DFT calculations, which show the binding energies of Al 3+ with extractants are in the order of Al 3+ -P204 > Al 3+ -P507 > Al 3+ -Cyanex 272, and Cyanex 272 exhibits the highest difference in binding energies of Ni 2+ and Co 2+ . The process of Ni and Co recovery from the alkaline leaching residue of spent HPCs was proposed. Only 8 t CO 2 and 120 kg SO 2 emissions were generated during all the component recovery per ton of the spent HPCs using our proposed process. They are much less than pyro-hydrometallurgical processes.
研究领域:
环境科学
·
冶金工程
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）