SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Hua Shuai,Junhui Liu,Yesong Teng,Xing Liu,Lingmin Wang,Hanting Xiong,Pengxiang Wang,Jingwen Chen,Shixia Chen,Zhenyu Zhou,Shuguang Deng,Jun Wang
Energy-efficient adsorptive separation shows great potential for the one-step production of high-purity ethylene (C 2 H 4 ) from ternary C 2 hydrocarbons. However, it remains a formidable challenge to fabricate high-performance adsorbents that exhibit simultaneous high selectivity (>2) towards acetylene/ethylene (C 2 H 2 /C 2 H 4 ) and ethane/ethylene (C 2 H 6 /C 2 H 4 ). Herein, we report a pillar-layered metal–organic framework, Ni(sdba)(dabco) 0.5 (H 2 sdba = 4,4′-sulfonyldibenzoic acid; dabco = 1,4-diazabicyclo [2.2.2] octane), for preferential trapping of C 2 H 6 and C 2 H 2 over C 2 H 4 . The abundant accessible binding sites endow Ni(sdba)(dabco) 0.5 with outstanding C 2 H 2 /C 2 H 4 (2.28) and C 2 H 6 /C 2 H 4 (2.47) selectivity with high C 2 H 6 (3.15 mmol g −1 ) and C 2 H 2 (4.41 mmol g −1 ) uptake among porous materials reported for one-step C 2 H 4 purification. Dynamic breakthrough experiments demonstrated the feasibility of producing high-purity C 2 H 4 (>99.9%) from C 2 H 2 /C 2 H 6 /C 2 H 4 gas-mixtures (1/1/1 and 1/9/90, v/v/v ) in a single step. Computational simulations reveal that the aromatic-rich pore spaces, which decorated with accessible interlayer uncoordinated oxygen atoms of sulfonyl groups and alkyl functionalities, can provide multiple C-H···O, C-H···π, and C-H···H interactions for selectively recognizing C 2 H 6 and C 2 H 2 over C 2 H 4 .
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2016
·
IF 1.835
Wei Su,Ai Zhang,Yan Sun,Meng Ran,Xiaojing Wang
Adsorption isotherms of pure C2H4 and C3H6 were measured on 11 adsorbents and at pressures up to 0.8 MPa using a volumetric method. The Brunauer–Emmett–Teller (BET) surface area of the adsorbents had a significant effect on adsorption capacities of both C2H4 and C3H6. The metal organic framework MIL-101 had the highest BET surface area and the highest adsorption capacity. For zeolite molecular sieves 5A, the C2H4 adsorption capacity was higher than that of C3H6, which is opposite to the results for most adsorbents. The isosteric heats of C3H6 on AC-1, 5A, MIL-101, ZIF-8, and SG-1 were higher than those of C2H4. The C3H6/C2H4 separation selectivities were calculated using the ideal solution theory, and the activated carbon AC-1 had the highest separation selectivity of 8.8.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
ELECTROCHIMICA ACTA
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2025
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IF 5.6
Xu Ji,Weicong Xu,Chao Liu,Xing Wang
The electrocatalytic CO₂ reduction reaction (CO₂RR) offers a promising pathway for carbon cycling and high-value fuel synthesis. However, the efficient production of ethylene (C₂H₄), a critical multicarbon product, remains constrained by insufficient catalyst activity and selectivity. Although copper-based materials enable C–C coupling, conventional CuO catalysts suffer from imbalanced *CO intermediate adsorption strength and sluggish charge transfer kinetics.In this study, a silica (SiO₂) doping strategy was employed to synergistically modulate the electronic structure and surface active site distribution of CuO, significantly enhancing CO₂-to-C₂H₄ conversion efficiency. Experimental results demonstrate that SiO₂ incorporation induces local electronic density rearrangement around Cu²⁺, stabilizing *CO adsorption, while the constructed Cu-O-Si interfaces accelerate charge transfer, enhances electron transfer and reduce the energy barrier for *COCHO formation. The optimized SiO₂-10%/CuO catalyst achieves a C₂H₄ Faraday efficiency of 42% and a partial current density of 6.3 mA/cm² at −1.4 V (vs. RHE), representing a threefold improvement over pristine CuO. Notably, the catalyst exhibits exceptional stability over 4 hours.Structural characterization and theoretical calculations reveal that SiO₂ doping promotes the self-assembly of CuO nanosheets into flower-like architectures with a high specific surface area and exposes synergistic (111)/(002) facets, which collectively enhance *CO intermediate enrichment and directional coupling. This work provides novel insights into designing high-performance CO₂RR catalysts through multidimensional modulation strategies.
研究领域:
材料科学
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电化学
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DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2022
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IF 3.898
Xi Zhang,Xiaodong Wang,Wei Huang
In industry, ethylene (C 2 H 4 )/propylene (C 3 H 6 ) separations are usually performed by a cryogenic process, which is energy intensive. Membrane separation technology is an alternative separation process that saves energy and is efficient. In this study, blend membranes were prepared by doping polyethylene glycol (PEG600) into a poly(ether-block-amide) (Pebax® 2533) matrix and were used to separate the C 2 H 4 /C 3 H 6 mixture. The PEG 600 and Pebax® 2533 polymers have good compatibility because they share hydrogen bonds. The addition of PEG600 is conducive to the hydrophilicity and the free volume of blend membranes, and it is also conducive to the solubility of C 2 H 4 and C 3 H 6 in the membranes, which improves the ability of the membranes to separate this gas pair. The Pebax® 2533/PEG600 blend membrane with 15% (mass) PEG600 showed the highest separation performance in our investigated membranes, with a C 3 H 6 /C 2 H 4 selectivity of 8.9 and a C 3 H 6 permeability of 196 barrer (1 barrer = 1.33 × 10 14 m 3 (STP)·m·m −2 ·s −1 ·kPa −1 ) at 238 K and 0.2 MPa, which is higher than that of the Pebax® 2533/NaY-6% (mass) membrane ( α C 3 H 6 /C 2 H 4 =6.5, P C 3 H 6 =211 barrer) reported in our previous work. It is confirmed that incorporating PEG600 into the Pebax® 2533 matrix to fabricate blend membranes is an efficient strategy for separating light olefins .
研究领域:
化学工程
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材料科学
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DOI
高影响因子
CATALYSIS COMMUNICATIONS
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2022
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IF 3.51
Zhi-xiu Yang,Xiu Wen,Li-jing Gao,Jin Zhang,Rui-ping Wei,Xiao-mei Pan,Guo-min Xiao
The electrocatalytic carbon dioxide reduction provides a promising route to alleviate the greenhouse effect and energy crisis. We investigated the influencing factors that conversion of CO 2 to C 2 H 4 by preparing Cu 2 O nanoparticles (Cu 2 O-p, Cu 2 O-2p, and Cu 2 O-3p) with exposed different crystal facets, sizes, and grain boundaries. Impressively, the Cu 2 O-3p catalyst exhibits superior selectivity (57.8%) for C 2 H 4 generation due to its abundant {100} & {111} grain boundaries. The study demonstrated that rich grain boundaries have a significant effect on C C coupling for electrocatalysis CO 2 reduction, and offered a learnable route for high-efficient CO 2 reduction catalysts by regulating grain boundary.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Mengchen Wu,Yang Yang,Jing Zhao,Rui Liu
In CO 2 electroreduction, mutative intermediates and the challenging C C coupling necessitate the spatial interplay between active sites and through dynamically optimizing configurations. Herein, we anchor ethylenediaminetetraacetic acid (EDTA)-bonded Cu x+ /Bi 3+ pair within UiO-66 for a spontaneous spatial-optimizing CO 2 -to-C 2 H 4 electroreduction. Ab initio molecular dynamic (AIMD) simulation visualizes that such metal pair adaptively interacts with intermediates. Density functional theory (DFT) elicits the componential synergy, in which an upshift d-band of Cu activates CO 2 being protonated into *COOH while Bi site stabilizes oxygenated dimers for deep hydrogenation. The dynamic feature of such pair affords large freedom for sorption and migration of various intermediates, which consequently bestows UiO-66-EDTA/CuBi a maximal FE C 2 H 4 of 47 % and a total current density over 100 mA cm −2 in the flow cell.
研究领域:
材料科学
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催化化学
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能源转化
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产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2025
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IF 5.4
Qifan Yang,Haodong Xie,Xiang Ni,Li Liu,Yuan Xue,Yan Liu,Lei Wang,Hongjun Zhu
Adsorptive separation of C 2 H 2 from C 2 H 4 , which could deal with multi-steps for their similar kinetic diameter and physical properties, still poses a significant challenge. In this work, we prepared two metal cations (Co 2+ , Zn 2+ )-exchanged aluminosilicate FAU zeolites as an inorganic porous matrix, and grafted an organic zeolitic imidazole framework crystal layer to construct the inorganic–organic composites for gas separation process of C 2 H 4 among the mixed gas components. Such inorganic–organic porous composites can adsorb C 2 H 2 and hinder the large-sized C 2 H 4 . The Co-FAU@ZIF-8 composite was verified through breakthrough experiments and demonstrated a promising adsorptive volume of 1.46 mmol g −1 with an IAST selectivity of C 2 H 2 /C 2 H 4 of 5.6 at 298 K, respectively. Via powder X-ray diffraction crystallography and combined spectroscopy, we found that the exchanged metallic cation located at the accessible s 6 r , and served as the anchor point for the epitaxy of different crystals. Such tunable features ( i.e. , metallic centers and pore diameter) provide a potential pathway for the sub-sequential development of highly efficient adsorptive materials.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
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2024
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IF 2.2
Mohan Chen,Yichao Wang,Ziwen Fan,Yue Wang,Zheng Niu,Jianping Lang
Graphical We prepared a series of fluorinated MOFs through the post- synthesis modification of the classic Zr-based MOF-808. The fluorinated alkane pores within MOFs can enhance the forces between the framework and C 2 H 2 , therefore, the difference in the adsorption capacity to C 2 H 2 and C 2 H 4 making it possible to effectively separate the C 2 H 2 /C 2 H 4 mixture at room temperature. The separation of ethylene (C 2 H 4 ) and acetylene (C 2 H 2 ) is challenging due to their similar molecular dimensions and boiling points, making conventional methods like cryogenic distillation and solvent extraction inefficient and environmentally harmful. Fluorinated metal-organic frameworks (MOFs) have been proven to be an effective material for the separation of C 2 H 4 and C 2 H 2. However, their direct synthesis is relatively expensive and challenging. In this study, we report a facile post-synthetic modification strategy to introduce fluorinated alkane pores into a zirconium-based MOF, MOF-808. The construction of fluorine-containing pores within the MOFs prefers adsorption for C 2 H 2 attributed to the interaction between the fluorine atoms and C 2 H 2 . This series of fluorinated MOFs demonstrates potential for gas separation processes, with the highest separation ratio reaching 2.67 (1 : 99) at 298 K. Breakthrough experiments for C 2 H 2 /C 2 H 4 mixtures confirmed that fluorinated MOF is capable of separating C 2 H 2 /C 2 H 4 , making it a potential candidate for industrial application. Moreover, the simplicity of the post-synthetic modification method suggests a viable strategy for the synthesis of fluorinated MOFs.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Shanshan Qiao,Yuqing Chen,Yanhong Tang,Jili Yuan,Jiachao Shen,Danyu Zhang,Yi Du,Ziru Li,Dingwang Yuan,Haifang Tang,Chengbin Liu
Cu 2 O is promising to catalytically convert CO 2 into C 2 products by overcoming the instability and slow multi-electron transfer. Regulating catalytic construction and interface microenvironment is challenging to stabilize Cu 2 O and selectively convert CO 2 to C 2+ hydrocarbons. A photocatalyst (Cu 2 O@Cu-CN) of oxygen vacancy–rich Cu 2 O@Cu symbiont embedded in N -doped carbon skeleton is achieved by ligand competition strategy. The Schottky junction and the hydrophobic microenvironment in the catalyst together stabilize the active site against the Cu 2 O redox reaction. The hydrophobic interface can make the catalyst favorable for trapping CO 2 . The asymmetric interface with oxygen vacancy can enhance the adsorption and activation of CO 2 and *CO, thus reducing the energy barrier for the formation of *OCCO intermediates and promoting the coupling conversion of *OCCO to C 2 H 4 . The C 2 H 4 evolution rate reaches 46.27 μmol C2H4 g cat -1 h −1 with a high selectivity of 40.3 % using triethanolamine (TEOA) as a sacrificial agent, and the apparent quantum yield (AQY) is as high as 14.41 % (λ = 420 nm). The C 2 H 4 evolution rate is 2.10 μmol C2H4 g cat -1 h −1 in water without TEOA. Moreover, the productive rate of C 2 H 4 still maintains 95.37 % after lasting 20 h, showing a robust long − term stability.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
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IF 15.7
Dong Hao,Luo Ran,Zhang Gong,Li Lulu,Wang Chaoxi,Sun Guodong,Wang Hongyi,Liu Jiachang,Wang Tuo,Zhao Zhi-Jian,Zhang Peng,Gong Jinlong
Direct electrochemical ethylene (C 2 H 4 ) epoxidation with water (H 2 O) represents a promising approach for the production of value-added ethylene oxide (EO) in a sustainable way. However, the activity remains limited due to the sluggish activation of C 2 H 4 and the stiff formation of *OH intermediate. This paper describes the design of a Ag/SnO 2 electrocatalyst to achieve efficient electrochemical C 2 H 4 epoxidation with a high faradaic efficiency of 39.4% for EO and a high selectivity of 91.5% at 25 mA/cm 2 in a membrane electrode assembly. Results of in situ attenuated total reflection infrared spectra characterizations and computational calculations reveal that the Ag/SnO 2 interface promotes C 2 H 4 adsorption and activation to obtain *C 2 H 4 . Moreover, electrophilic *OH is generated on the catalyst surface through H 2 O dissociation, which further reacts with *C 2 H 4 to facilitate the formation of *C 2 H 4 OH, contributing to the enhanced electrochemical epoxidation activity. This work would provide general guidance for designing catalysts for electrochemical olefin epoxidation through interface engineering.
研究领域:
材料科学
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电化学
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催化化学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2023
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IF 4.2
Xiaobing Wang,Qi Ding,Rimin You,Cong Yu,Yujia Li,Junjie Zhao,Xili Cui,Huabin Xing
The development of efficient membranes for ethylene/ethane (C2H4/C2H6) separation is highly important. Here, we report the development of a series of new mixed matrix membranes (ZnAtzPO4/6FDA-DAM MMMs) based on a microporous material with phosphate anion pillar ZnAtzPO4 (Atz = 3-amino-1, 2, 4-triazole) and 6FDA-DAM polymer matrix. Compared with the pure 6FDA-DAM membranes, the C2H4 permeability and the C2H4/C2H6 selectivity of 10 wt % ZnAtzPO4/6FDA-DAM MMMs were simultaneously increased by 46 and 6%, breaking the trade-off between permeability and selectivity. Interestingly, the separation performance of ZnAtzPO4/6FDA-DAM MMMs at 10 wt % for the equimolar C2H4/C2H6 gas mixture was 105.0 Barrer and 3.90, which surpassed the 2013 upper bound of C2H4/C2H6. For ZnAtzPO4/6FDA-DAM MMMs with 10 wt % filler loading, both the solubility selectivity and the diffusion selectivity continued to rise concurrently, enhancing the C2H4/C2H6 separation performance of ZnAtzPO4/6FDA-DAM MMMs. This work generates a useful concept for the design and fabrication of high-performance MMMs.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
AICHE JOURNAL
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2015
·Vol. 61
·期 6
·2016-2027
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IF 2.748
Xu Zhao,Qiwei Yang,Dan Xu,Zongbi Bao,Yi Zhang,Baogen Su,Qilong Ren,Huabin Xing
Ionic liquids (ILs) have been proposed as promising solvents for separating C 2 H 2 and C 2 H 4 , but screening an industrially attractive IL with high capacity from numerous available ILs remains challenging. In this work, a rapid screening method based on COSMO-RS was developed. We also present an efficient strategy to improve the C 2 H 2 capacity in ILs together with adequate C 2 H 2 /C 2 H 4 selectivity with the aid of COSMO-RS. The essence of this strategy is to increase molecular free volume of ILs and simultaneously enhance hydrogen-bond basicity of anions by introducing flexible and highly asymmetric structures, which is validated by a new class of tetraalkylphosphonium ILs featuring long-chain carboxylate anions. At 298.1 K and 1 bar, the solubility of C 2 H 2 in ILs reaches 0.476 mol/mol IL, very high for a physical absorption, with a selectivity of up to 21.4. The separation performance of tetraalkylphosphonium ILs to the mixture of C 2 H 2 /C 2 H 4 was also evaluated. © 2015 American Institute of Chemical Engineers AIChE J , 61: 2016–2027, 2015
研究领域:
化学工程
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材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）