SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9.1
Tianyu Li,Mengna Zhan,Rongkun Jiang,Yiqing Zeng,Shule Zhang,Zhaoxiang Zhong
CuO-based catalysts have garnered significant attention for CO oxidation reaction, while their susceptibility to sulfur poisoning limits their practical application in industrial flue gas treatment. In this study, three CuTi oxide catalysts with distinct CuO-TiO 2 heterointerfaces were prepared by sol-gel, impregnation, and mechanical mixing methods to investigate the influence of interfacial structure on CO oxidation activity and SO 2 tolerance. Catalytic performance and characterization show that a high-density CuO-TiO 2 heterointerface can induce the formation of strong Cu Ti interactions and improve the dispersion of copper species. These effects facilitate CO adsorption and increase oxygen vacancy concentration, thereby enhancing the low-temperature CO oxidation activity. Although the high-density heterointerface enhances SO 2 adsorption capacity, the accompanying strong Cu Ti interaction reduces the stability of copper sulfate (Cu-O-S) species. This promotes the decomposition of copper sulfate and helps preserve active sites, thus improving SO 2 tolerance. This work offers new insights into the rational design of sulfur-tolerant CuO-based catalysts for CO oxidation.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Wenxiang Zhang,Yue Wu,Yongzheng Wang,Heping Ma
Selective capture of sulfur dioxide (SO 2 ) is of great significance in the context of environmental protection, yet it remains an ongoing challenge. To address inefficient SO 2 removal from flue gas, this study synthesized a cage-like organic network (CON) and converted it into an ionic I-CON via facile quaternization modification. Solid-state 13 C NMR, XPS, SEM and TEM-EDS confirmed iodine ion (I − ) incorporation in I-CON, narrowing its pore size to 1.05 nm. Single-component gas adsorption experiments demonstrated that I-CON exhibits an SO 2 uptake as high as 16.44 mmol/g at 298 K, surpassing that of CON (11.54 mmol/g). Furthermore, the IAST (Ideal Adsorbed Solution Theory) selectivity of I-CON for SO 2 /CO 2 binary gas mixture also exceeded that of CON (112.10 vs 93.96). Dynamic tests showed I-CON has prolonged SO 2 breakthrough time to 3592 s, indicating that the high dynamic selectivity of I-CON for SO 2 /CO 2 and SO 2 /N 2 . DFT calculations revealed that the synergistic effect between the surface electric field-mediated induced polarization and charge transfer in I-CON significantly enhances its selective adsorption performance toward SO 2 . This study validates the potential of I-CON in the efficient capture of SO 2 .
研究领域:
环境科学
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材料化学
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气体分离
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吸附技术
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计算化学
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
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IF 11.3
Xinyu Han,Liangliang Jiang,Zeshu Zhang,Kaijie Liu,Mengyao Bian,Zhaoxu Yuan,Yannan Li,Cheng Rao,Xiangguang Yang,Yibo Zhang
Cerium-based catalysts for the selective catalytic reduction of NOx with ammonia (NH3-SCR) face significant challenges in practical applications, particularly their poor low-temperature activity and susceptibility to SO2 poisoning. In this study, photothermal catalysis was innovatively applied to the NH3-SCR reaction over MoWOx/CeO2 catalysts, achieving remarkable improvements in the low-temperature performance and SO2 resistance. Under photothermal conditions, the catalyst maintained NOx conversion above 90% at 200 °C, even in the presence of 250 ppm of SO2. Comprehensive characterization revealed that light irradiation significantly enhanced the formation of oxygen vacancies on the catalyst surface and weakened NO adsorption, indicating that the NH3-SCR reaction follows the Eley–Rideal mechanism, which contributes to its excellent low-temperature activity. Moreover, photothermal conditions reduced the chemical adsorption intensity of SO2, effectively inhibiting the formation of ammonium sulfate. Density functional theory calculations further demonstrated that the narrow band gap of MoWOx promotes electron transfer from the O 2p orbital to the Ce 4f orbital at the Ce–O–Mo(W) interface under light, leading to electron enrichment at active sites and suppression of SO2 oxidation. This work not only provides a novel strategy for enhancing the NH3-SCR performance but also represents a groundbreaking advancement in the design of highly efficient, SO2-resistant catalysts for low-temperature applications.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
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IF 9
Laigang Hu,Min Hu,Mengxue Zhang,Weiwei Wang,Ling Jiang,Wenhao Wu,Daohui Lin,Kun Yang
Sulfur dioxide (SO 2 ) adsorption, from the exhaust gas of the industrial processes and vehicles, remains an issue due to the corrosive nature of SO 2 . Herein, a novel amino-functionalized bio-derived metal–organic framework, named Bio-ZJU-928(Ni), comprises “paddle-wheel” shaped nickel secondary building unit, acetic acid ligand, and adenine with amino group. It exhibits excellent chemical-thermal stability, specific surface area (634 m 2 g −1 ), outstanding trace SO 2 adsorption (2.94 mmol g −1 ) at 0.002 bar and 273 K, and good cyclical SO 2 adsorption–desorption performance. Bio-ZJU-928(Ni) also has excellent SO 2 selectivity adsorption, identified by its higher ideal adsorption solution theory values for SO 2 /N 2 (32,145) and SO 2 /CO 2 (259.35) at 10/90 ( v/v ) and 273 K, respectively. Under relative humidity (50 %), the dynamic SO 2 adsorption of Bio-ZJU-928(Ni) is 32.47 cm 3 g −1 , which is higher than that of Bio-ZJU-928(Ni) under dry condition (23.08 cm 3 g −1 ) at the mixture gases (N 2 /CO 2 /O 2 /SO 2 = 81.8:15:3:0.2). The enhanced SO 2 adsorption of Bio-ZJU-928(Ni) can be ascribed to the O=S=O···H − O hydrogen bond formed with water, as verified by in situ diffuse reflectance infrared Fourier transform spectroscopy and Grand canonical Monte Carlo simulations
研究领域:
材料科学
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环境科学
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JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 9
·6116-6136
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IF 3.9
Liu Xiaoli,Xu Mengjin,Guo Jiaxiu,Li Jianjun
The desulfurization performance for Mn-Ni supported on activated carbons (Mn-Ni/NAC) calcined at different temperatures varies considerably. The physicochemical properties of Mn-Ni/NAC have been investigated by a series of characterization studies. The moderate calcination temperature contributed to a larger surface area and abundant oxygen-containing functional groups (C = O), thus provided more anchoring sites for the dispersion of Mn 2+ and Ni 0 species. The optimal Mn-Ni/NAC-700 exhibited superior desulfurization performance, achieving breakthrough sulfur capacity and breakthrough time of 287 mg/g and 531 min, respectively. The nucleophilic C = O groups served as active sites for chemically absorbing SO 2 . Ni 0 could serve as an oxygen activator, and promote the transfer of oxygen molecules to oxidize SO 2 . During the desulfurization, SO 2 adsorbed on the C = O groups gradually mainly converted into sulfate (SO 4 2− ). This conversion process was closely linked to the decrease of surface C = O groups and the formation of C–O groups. As the reaction proceeds, reaction products (SO 4 2+ ) begin to accumulate, blocking the pore channels of the catalyst and generating MnSO 4 , resulting in catalyst deactivation. This work will guide the design of high-performance activated carbon-based adsorbents suitable for practical applications.
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ACS Applied Materials & Interfaces
·
2020
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IF 8.758
Qingping Xin,Xu Li,Hailong Hou,Qingqing Liang,Jianping Guo,Shaofei Wang,Lei Zhang,Ligang Lin,Hui Ye,Yuzhong Zhang
An organic–inorganic polyvinylidene fluoride/polyvinylidene fluoride–silica (PVDF/PVDF-SiO2) mixed matrix membrane contactor is fabricated via a facile and efficient hydrophobic modification method. The solubility parameters of the PVDF particle are precisely regulated, the PVDF particles are blended with SiO2 nanoparticles to form PVDF-SiO2 suspension, and then the suspension is introduced onto the surface of the PVDF substrate by an in situ spin coating strategy. The PVDF particles are partly etched and incorporated to construct the adhesive PVDF-SiO2 core–shell layer on the PVDF substrate, which results in a more stable PVDF-SiO2 coating layer on the substrate. The surface structure is precisely regulated by changing the etching morphology of PVDF particles and amount of doped PVDF and SiO2 particles, forming an integrated porous PVDF-SiO2 layer and constructing hierarchical lotus-leaf-like interfaces. The resultant PVDF/PVDF-SiO2 membrane contactors display the relatively regular distribution of pore size with ∼420 nm and excellent hydrophobic property with a water contact angle of ∼158°, which noticeably lightens wetting phenomena of membrane contactors. The SO2 absorption fluxes can reach as high as 1.26 × 10–3 mol·m–2·s–1 using 0.625 M of ethanolamine (EA) as liquid absorbent. The high stability of the SO2 absorption flux test indicates the excellent interface compatibility between the PVDF-SiO2 coating layer and the PVDF substrate. The versatile organic–inorganic layer exhibits super hydrophobic property, which prevents wetting of membrane pores. In addition, the membrane mass transfer resistance (H/Km) and membrane phase transfer coefficient (Km) are explored.
研究领域:
环境工程
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膜科学
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气体分离
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材料科学
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化学工程
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高影响因子
ANALYTICA CHIMICA ACTA
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2018
·
IF 5.123
Guangle Song,Aikun Liu,Hongli Jiang,Ruixue Ji,Jian Dong,Yanqing Ge
A mitochondria-targeted ratiometric fluorescent probe based on hemicyanine and pyrido[1,2-a]benzimidazole was presented. It shows high sensitivity and selectivity toward SO 2 in pure water. The limit of detection (LOD) was as low as 26.7 nM, which is superior to most reported probes. Most importantly, the probe was successfully used for fluorescence imaging of endogenous bisulfite in mitochondria in Glioma cells.
研究领域:
生物化学
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细胞生物学
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医学影像学
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高影响因子
AICHE JOURNAL
·
2018
·Vol. 65
·期 1
·409-420
·
IF 3.326
Minghui Qiu,Xiangli Kong,Kaiyun Fu,Shixian Han,Xingyin Gao,Xianfu Chen,Yiqun Fan
Membrane gas absorption (MGA) is of great interest for SO 2 capture from ship exhaust, as it has high separation efficiency and, more importantly, is comprised of a separator that can be flexibly installed and operated on ships. Here, we report a class of hydrophobic tubular asymmetric ceramic membranes for SO 2 absorption. To find the membranes with reasonable microstructure and geometry, we used a numerical 2D model to simulate SO 2 absorption process and verified the model by comparing its results with experimental data. Simulations showed that most of the SO 2 mass transfer resistance existed in membrane phase, indicating that the optimization of membrane parameters, rather than operational conditions, should be the primary consideration to enhance the overall SO 2 mass transfer performance. Furthermore, simulations indicated that the SO 2 separation performance depended negligibly on membrane pore sizes, but can be significantly improved by optimizing the thickness and inner diameter of membrane tubes. © 2018 American Institute of Chemical Engineers AIChE J , 65: 409–420, 2019
研究领域:
化学工程
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环境工程
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膜科学
·
气体分离
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Journal of Cleaner Production
·
2024
·
IF 9.7
Shuaiyong Dou,Kang Liu,Yanru Feng,Xuan Wang,Bowen Zhang,Cunchao Yang,Mengru Sun,Jing Han,Erhong Duan
The modern fossil fuel utilisation industry has proposed higher requirements for SO 2 removal to meet cleaner production requirements, such as the reusability of desulfurisers, avoidance of equipment corrosion, and recovery of sulfur resources. This study constructed a novel type III porous liquids (PLs) which combine the fluidity of liquids and the permanent porosity of solid materials by uniformly dispersing porous metal-organic framework particles of NENU-3a into a steric solvent of polydimethylsiloxane , and used them for SO 2 capture and recovery. A novel desulfurisation system was developed using tert-butanol peroxide as the oxidant and water as the extractant. The endowed porosity of the PLs significantly improved the SO 2 capture performance, and the polydimethylsiloxane solvent acted as a protective screen to prevent the corrosion of SO 2 to the equipment. The prepared PLs exhibited excellent reusability owing to their structural stability. Furthermore, the captured SO 2 was fully oxidised to SO 4 2− due to the excellent catalytic oxidation activity of encapsulated polyoxometalates in NENU-3a, thus obtaining a high-purity sulfuric acid product. This work not only proposes a novel technology to realise the resource ability of SO 2 under environmentally friendly conditions but also opens a new window for the rational treatment of emitted SO 2 gas based on PLs to meet the new requirements for fossil fuel utilisation.
研究领域:
环境科学
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化学工程
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材料科学
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NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 48
·21228-21237
·
IF 3.288
Bo Hao,Wenbo Zhao,Dong Feng,Shengchao Xu,Yuan Chen
The enforcement of environmental law worldwide has attracted considerable attention in recent years towards capturing sulfur dioxide (SO2). The phase change absorption has turned out to be an effective way due to its industrially scalable characteristics. Herein, an aminosilane absorbent, namely dibutyl-trimethylsilanylmethyl-amine (DTSMA), was facilely synthesized by a substitution reaction of chloromethyltrimethylsilane and di-n-butylamine. The phase-change absorption performance of SO2 was systematically studied by using dimethyl silicone oil (DSO) as the solvent. The viscosity of pure DTSMA was only 1.29 mPa s, which is much lower than those of absorbents such as ionic liquids and deep eutectic solvents reported elsewhere, and the absorption product is found to be a charge transfer complex DTSMA SO2. The absorption capacity of DTSMA can reach 1.90 and 0.57 mol SO2 per mol DTSMA under 1 and 0.02 atm at 30 °C, respectively. In particular, the DTSMA/DSO solution can be not only almost regenerated within just 60 minutes at 100 °C, but also exhibited selective absorption towards SO2. All the results indicated that the synthesized DTSMA absorbent has enormous potential for application in capturing SO2 with benign circular desorption performance.
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JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Qingping Xin,Ke An,Yu Zhang,Mingya Yun,Shaofei Wang,Ligang Lin,Hui Ye,Xiaoli Ding,Hong Li,Yuzhong Zhang
Membrane contactor has been considered to be a prospective alternative to traditional technology for toxic acid gases capture. In this study, the mixed matix membrane contactors (MMMCs) with the metal organic frameworks (MOFs, MIL-101(Cr)) as fillers are fabricated for high-efficiency SO 2 removal. The MIL-101(Cr) with microporous structure provides more SO 2 channels for the enhancement of SO 2 absorption flux. Moreover, the open metal sites from MIL-101(Cr) display the high affinity to SO 2 , which construct “SO 2 -philic” channels in the finger-like pore structure , resulting in the increment of SO 2 removal efficiency. The introduction of MIL-101(Cr) into PVDF modifies the physical structure verified by scanning electron microscope (SEM), liquid entry pressure (LEPw) and gas permeation test et al. The newly developed MIL-101(Cr) doped MMMCs exhibit competitive hydrophobicity with the water contact angle of 119°. In particular, the M 9 15 MMMC with MIL-101(Cr) loading 15 wt% displays the optimum SO 2 absorption performance with the SO 2 absorption flux and SO 2 removal efficiency of 1.09 × 10 −3 mol m −2 s −1 and 89.51%, respectively. The SO 2 mass transfer coefficient in membrane ( K m ) is significantly enhanced to 4.44 × 10 −3 m s −1 and membrane phase resistance ( H / K m ) is noticeably decreased to 92.96 s m −1 . Besides, the MIL-101(Cr) doped MMMCs show both the alkali resistance and long-term stability.
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高影响因子
Green Energy & Environment
·
2020
·
IF 6.395
Lili Jiang,Ke Mei,Kaihong Chen,Rina Dao,Haoran Li,Congmin Wang
An efficient method for prediction in the capture of SO 2 from flue gas by imidazolium ionic liquids was reported, where the concentration of SO 2 is 2000 ppm. On the basis of quantitative calculations through a combination of Langmuir simulation, theoretical calculation and quantum chemical method, SO 2 absorption and desorption performance from flue gas by twelve kinds of imidazolium ionic liquids with different anions were designed and predicted. Then, among them, five kinds of imidazolium ionic liquids were chosen and prepared to investigate their behavior of SO 2 absorption capacity , desorption residue, and available absorption capacity. The results indicated that the experimental values were in good agreement with the predicted values. Thus, an ideal ionic liquid [Emim][Tetz] was obtained through the predictive method for the capture of SO 2 of 2000 ppm, which showed high available absorption capacity of 0.24 g SO 2 per g ionic liquid and excellent reversibility .
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