SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Jielong Zhou,Bo Wang,Xiandong Hao,Zhiyong Xu,Wenbo Zhao
In the absorption of SO 2 , it is very important for industrial applications to set up mathematical models to describe the changes in physical–chemical properties and the absorption dynamic processes. However, most of the research only pays attention to the molecular structure of absorbent. Few works have investigated the mathematical models in the absorption processes. To make up for the research gap in this area, a binary absorbent composed of 2-(dibutylamino)ethanol (DBEA) and 1-Ethyl-3-methylimidazolium trifluoromethanesulfonate ([Emim][TfO]) were developed for SO 2 capture in the present work. A systematic mathematical model was proposed to accurately predict the viscosity and density of the absorption system with different absorbent compositions, SO 2 absorption capacities, and temperatures. Additionally, the absorption kinetics and thermodynamics were analyzed across varying absorbent compositions and SO 2 -containing gas flows, enabling dynamic prediction of the absorption process. Furthermore, the correlation between desorption residuals and desorption temperature was investigated, along with an analysis of SO 2 /CO 2 selectivity and the cyclic SO 2 absorption performance. This work provides a robust framework for rational screening and design of alkanolamine-IL hybrid solvents, bridging the gap between experimentally empirical solvent development and theoretical prediction.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2021
·
IF 5.909
Zeyu Geng,Qin Xie,Zhongjiao Fan,Weining Sun,Wei Zhao,Junhao Zhang,Jianqiu Chen,Yun Xu
Four tertiary amine-based protic ionic liquids (PILs) have been carefully designed to investigate the performance of SO 2 uptake. Their physical properties of densities and viscosities were determined. In the four PILs, the highest capacity for SO 2 of the four PILs reached up to 5.64 mol/kg ILs (P = 1.0 bar, T = 313.2 K). The ideal selectivity of SO 2 /CO 2 was up to 250 in the separation application of SO 2 from CO 2 . The kinetic study demonstrated that the PILs could efficiently capture SO 2 quickly under the ambient pressure. Based on the SO 2 absorption capacity and selectivity, excellent recyclability , and fast absorption process, the PILs in this work are considered as a potential alternative to traditional absorbents in the flue gas desulfurization (FGD).
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2018
·
IF 3.141
Muyuan Chai,Wenbo Zhao,Genming Li,Shengchao Xu,Qingming Jia,Yuan Chen
In order to avoid the high energy consumption in SO2 capture with aqueous amine absorbents, a liquid–liquid SO2 phase-change absorbent (SPCA) was developed in the present work using N,N-dimethylaniline (DMA) as absorbent, and high-boiling liquid paraffin was used as solvent to adjust the boiling point of the solution. The homogeneous solution would form two immiscible liquid phases after SO2 bubbling, only the SO2-rich phase needed to be desorbed, which could effectively reduce the energy consumption. Different from the liquid–solid phase-change absorbents developed in our previous work, the liquid–liquid phase-change absorbent avoid their shortcomings such as difficulties in separation of absorption products. The absorption product of SPCA was proved to be a charge-transfer complex DMA·SO2 by NMR and FTIR characterization, and the phase-change mechanism was attributed to the polarity variation between DMA and DMA·SO2. The viscosities of SPCAs was lower than 11.65 mPa·s, and the viscosity of SO2-rich phase was 3.9 mPa·s at 30 °C. The mass absorption capacity was found to be 0.89 g SO2/g DMA at 1 atm and 20 °C by ignoring liquid paraffin. The SPCA exhibited extremely high mass selectivity of SO2/CO2 with the value of 351. In addition, it was found that water had no effect on the structure of the absorption product and the SO2 capacity of SPCA. SPCA could be completely regenerated in 50 min at 80 °C. All the results showed that the SPCAs composed of DMA/liquid paraffin have a good application prospect.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2020
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IF 5.774
Qingping Xin,Chao Zhang,Yu Zhang,Qingqing Liang,Lei Zhang,Shaofei Wang,Hui Ye,Xiaoli Ding,Yuzhong Zhang
Obtaining high SO 2 absorption flux for membrane contactor is noticeably vital for fule gas desulfurization, and superhydrophobic surface is essential to reach excellent desulfurization performance. The development of a generic and low budget strategy for membrane contactors preparation is important in indisturial application. In this study, a superhydrophobic polyethersulfone-silica (PES/PES-SiO 2 ) gas-liquid membrane contactor is fabricated using a facile spin coating method. PES substrate is prepared by a facile non-solvent induced phase separation (NIPS), and then the superhydrophobic surface of PES/PES-SiO 2 is formed on the PES substrate by spin coating method. The solubility parameters of mixed solvent, PES concentration, and SiO 2 content are regulated to investigate the morphology of membrane contactors. On one hand, the surface structure of MMMCs is regulated, and constructs lotus-leaf like morphology, which noticeably elevate surface roughness. On the other hand, SiO 2 nanoparticles enhance hydrophobic characteristic with water contact angle 159° and anti wetting resistance with liquid entry pressure of water (LEP w ) 1.389 bar. Moreover, the SiO 2 nanoparticles help to significantly improve the stability of desulfurization performance, which is much higher than PES control membrane after 12 h test. The SO 2 absorption fluxes and SO 2 removal efficiencies are 1.24 × 10 −3 mol·m −2 ·s −1 and 63.8%, respectively. Besides, the membrane phase transfer coefficient ( K m ) and membrane phase transfer resistance ( H / K m ) are explored.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Xu Li,Yanli Zhang,Qingping Xin,Xiaoli Ding,Lizhi Zhao,Hui Ye,Ligang Lin,Hong Li,Yuzhong Zhang
Membrane absorption is a convenient and efficient flue SO 2 capture technology . In this study, NH 2 -MIL-125 filled mixed matrix membrane contactor (MMMC) is constructed by Non-solvent Induced Phase Separation (NIPS) method. The functional groups and metal active sites on the surface of NH 2 -MIL-125(Ti) exhibit high affinity for SO 2 . The microporous structure of NH 2 -MIL-125(Ti) provides storage for adsorbed SO 2 , which is conducive to the formation of SO 2 enrichment zone in the membrane. The membrane morphology, wetting resistance, and light responsiveness et al of MMMC have been tested. The combination of NH 2 -MIL-125(Ti) adsorption and membrane absorption process effectively promotes the transfer of gas molecules in the membrane pores. The SO 2 absorption flux of MMMC filled by NH 2 -MIL-125(Ti) has a significant increment, reaching 8.81 × 10 −4 mol·m −2 ·s −1 and 9.77 × 10 −4 mol·m −2 ·s −1 under non-light and visible light conditions respectively, which is comparability with results in literature. The membrane phase mass transfer coefficient calculated by Wilson model is 149.6 s·m −1 , which shows the low resistance in membrane. The SO 2 absorption flux keep stable after 4 cycles of tests. The membrane contactor coupled with function fillers enhances the SO 2 capture ability and further promotes the enrichment of SO 2 , which has favorable development foreground.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2018
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IF 4.841
Jiahong Zhu,Yingjie Xu,Xiao Feng,Xiao Zhu
To get a better understanding of the effect of physicochemical properties and microstructure on SO 2 absorption behavior of DESs with different molar ratios of EmimCl and EG (from 2:1 to 1:2), densities ( ρ ), viscosities ( η ), speeds of sound ( u ), refractive indices ( n D ), and thermal decomposition temperatures ( T d ) of EmimCl-EG DESs were measured and used to obtain the other derived properties, such as thermal expansion coefficient ( α p ) and activation energy for viscous flow ( E η ). Moreover, FT-IR spectra and in situ variable-temperature NMR spectroscopy were employed to study the microstructures of DESs. Based on physicochemical and spectroscopic properties, the influence of the concentrations of EmimCl on the interactions in DESs was explored to be associated with their SO 2 absorption behavior. The results show that the interactions between Emim + and Cl − of EmimCl is gradually weakening with increasing the concentration of EG in DESs by forming of hydrogen bond interaction of O H⋯Cl − , resulting in a decrease of ρ , η , u , n D , and T d of DESs, and hindering the charge–transfer interaction of SO 2 with Cl − and deceasing SO 2 capture capacity. Moreover, the SO 2 absorption capacity of DESs is proportional to their ρ and E η , respectively.
研究领域:
化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
·
IF 3.573
Bin Jiang,Shuai Hou,Luhong Zhang,Na Yang,Na Zhang,Xiaoming Xiao,Xiaodong Yang,Yongli Sun,Xiaowei Tantai
Ionic liquids (ILs) as promising absorbents for SO2 capture in flue gas desulfurization have been extensively studied. In this work, a multisite absorption strategy was used to synthesize ether-linked diamine protic ionic liquids (EDPILs) for efficient SO2 capture. The prepared EDPILs containing ether-linkage chain exhibited superior SO2 absorption relative to conventional protic ionic liquids (PILs). Density functional theory calculations demonstrated that the ether-linkage chain intensified the physical interaction between EDPILs and SO2. In a subsequent experiment, bis(2-dimethylaminoethyl) ether dilactate [BDMAEE][L]2, which possessed outstanding SO2 capture capacities, was used to prepare aqueous solutions (aq), which reduced viscosity of PILs and improved their applicability. An in-depth assessment of the desulfurization performance of [BDMAEE][L]2 aq revealed that effective SO2 absorption can be achieved even at relatively low concentrations. Specifically, 50 wt % [BDMAEE][L]2 aq exhibited a high absorption capacity (1.04 molSO2/molILs, 0.097 gSO2/gabsorbents) as well as a high SO2/CO2 selectivity at 0.2 vol % SO2 and 40 °C. Overall, ether-linked absorbents with improved desulfurization performance (high SO2 absorption capacity, satisfactory SO2 removal efficiency, and excellent reusability) possess good application prospects in flue gas desulfurization.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Bo Wang,Jinyu Wang,Yuan Chen,Zhiyong Xu,Wenbo Zhao
N-Benzyl-N-methyl-1-(methyl diphenyl silyl) methanamine (MPSA) with high thermal stability was synthesized for the absorption of SO 2 in the present work. The absorption capacity was measured at low partial pressures ranging from 0.002 to 0.016 bar and thermodynamic parameters, including enthalpy change (Δ H ) and entropy change (Δ S ) were calculated to analyze the absorption behavior. The desulphurization rates and absorption capacities at different temperatures and partial pressures were simulated based on thermodynamic parameters. An optimal absorption temperature T 1 that maximizes the absorption capacity, and an optimal desorption temperature T 2 that minimizes the desorption residual capacity and thermal desorption energy consumption were defined, and a function was proposed to calculate them. The kinetic behavior of the absorption was described using a pseudo-first-order model, and kinetic data at different temperatures and partial pressures were simulated based on a combination of kinetic and thermodynamic parameters. Ultimately, selectivity and cycles experiment showing MPSA has excellent CO 2 selectivity and thermal regeneration performance.
研究领域:
环境化学
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气体分离
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热力学
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化学工程
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功能材料
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大气污染控制
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
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2017
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IF 3.091
Xiaocai Meng,Jianying Wang,Haichao Jiang,Xinle Shi,Yongqi Hu
A functional 2-ethyl-4-methylimidazole alanine ([Emim][Ala]) ionic liquid was synthesized. Its density, viscosity, and surface tension were measured at the temperature range from 293.15 to 343.15 K at atmosphere pressure. The solubility of SO2 in pure [Emim][Ala] ionic liquid and the binary mixture of [Emim][Ala] and water was also investigated. The absorption\desorption mechanism of SO2 was proposed on the basis of 13C nuclear magnetic resonance and Fourier transform infrared spectroscopy. Results showed that SO2 was captured as ammonia sulfonic acid ester by pure [Emim][Ala], while for the binary mixture of [Emim][Ala] and water, the final product of SO2 absorption is alanine and [Emim]+[HSO3]−/[Emim]+2[SO3]2–.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2020
·
IF 9.038
Can Cheng,Jianjun Li,Jinyan Cao,Jiaxiu Guo,Wanglai Cen
The absorption properties of N-(2-hydroxyethyl) morpholine (HEM), morpholine (MP) and N-(2-aminoethyl) morpholine (AEM) for SO 2 were studied using sulfolane (SUL) as solvent in this work. Among these solvent combinations, HEM/SUL shows the best cyclic absorption performance, and the capacity of HEM-SUL-40 (40 wt% of HEM and 60 wt% of SUL) to absorb 8580 mg/m 3 SO 2 (the remainder is N 2 ) is 192.18 mg/g at 293.15 K. The absorption capacity of the second cycle is 97.5% of the first absorption cycle, which is higher than 70% of the Cansolv amine solution in a commercial application with similar experimental conditions. However, MP/SUL is difficult to desorb at high temperature, and the absorption capacity of AEM/SUL is much lower than HEM/SUL and MP/SUL. According to the FTIR , 1 H NMR and 13 C NMR, all three cyclic amines have charge transfer effects with SO 2 . The structure of HEM/SUL can be recovered after heating, but MP cannot be recovered. Δ r G m ° in the reaction against HEM with SO 2 increases significantly with increasing temperature. The Δ r G m ° of HEM-SO 2 and MP-SO 2 at 353.15 K is −12.56 kJ/mol and −16.29 kJ/mol, respectively, which further explains the easy desorption of HEM-SO 2 and the difficult desorption of MP-SO 2 at high temperature.
研究领域:
化学工程
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环境科学
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）