CRYSTENGCOMM
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2016
·Vol. 18
·期 21
·3842-3849
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IF 3.849
Chunping Gao,Qi Shi,Jinxiang Dong
The performance of two hydrophobic zeolitic imidazolate frameworks, MAF-6 and TIF-1 Zn, in adsorptive separation of 1-butanol from acetone–butanol–ethanol model fermentation broth was studied and compared to the data reported for ZIF-8. It was found that, in single-component systems, the adsorption capacities of ZIF-8 and MAF-6 were larger than that of TIF-1 Zn, mainly because of their larger pore volume; however, the time necessary to reach equilibrium was shorter when TIF-1 Zn with a larger pore aperture was used. In breakthrough experiments, it was shown that the adsorptive separation mechanism on ZIF-8 and MAF-6 was based on combined thermodynamics and kinetic effects; on TIF-1 Zn, thermodynamic adsorption took place.
研究领域:
生物工程
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化学工程
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DOI
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
·
2016
·
IF 1.083
Zongbi Bao,Shuran Duan,Zhiguo Zhang,Huabin Xing,Baogen Su,Qiwei Yang,Yiwen Yang,Qilong Ren
Separation of oligosaccharides with a varied number of monosaccharides is an important issue in food chemistry. Raffinose, a functional oligosaccharide, has attracted increasing attentions due to its strong proliferative effect on bacteria. Industrially, cottonseed meal is an important resource for producing raffinose; however, raffinose extracted from the cottonseed meal contains a significant amount of sucrose that debases raffinose’s quality. In this work, an adsorptive separation of raffinose and sucrose on activated carbon was reported. Adsorption isotherms, adsorption kinetics and dynamic column adsorption–desorption were investigated. The activated carbon chosen has a significantly higher adsorption capacity of raffinose (0.60~0.65 g/g) than sucrose (0.35~0.40 g/g) at the equilibrium concentration studied (~35 g/L) and temperature from 293 K to 333 K. Adsorption isotherms and kinetics were fitted by the Freundlich isotherm model and the pseudo-second-order model, respectively. The effect of flow-rate and initial feed concentration on dynamic adsorption were investigated; meanwhile, the separation performance was further confirmed from dynamic desorption using aqueous ethanol of 20% as eluant. Remarkably, raffinose with purity over 90% and recovery of 79.2% could be obtained by the adsorption–desorption cycle using an aqueous feed solution containing 20 g/L of raffinose and 6 g/L of sucrose.
研究领域:
食品化学
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工业分离技术
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Jie Song,Lijun Chen,Yingnan Zhou,Zhiwen Yuan,Yuhua Niu,Zhiqiang Wei
With the rapid development of industrialization, the removal of heavy metal ions and small organic molecules from wastewater has triggered a hot debate. ZIF-8 was grown on a sodium alginate backbone using an in situ growth technique, the core-shell P-SMG@ZIF-8 was synthesized. It was also characterized by FTIR, XRD, SEM, UV–Vis and XPS, and the optimal conditions and mechanism of adsorption were explored. At pH 2.0, a contact time of 200 min, and 298 K, removal of Cu(II) and Ph up to 80.2 %, 65.6 % by P-SMG@ZIF-8, adsorption behavior consistent with Langmuir model for pseudo-secondary rates, the saturated adsorption of Cu(II) and Ph could reach up to 83.5812 mg/g and 78.1779 mg/g, respectively. And the adsorbed P-SMG@ZIF-8 is easy to separate and reusable, which is a cost-effective and efficient natural product-based adsorption material.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Yilai Zhong,Zengyuan Li,Jianchun Qin,Wenlong Li,Chunlin He,Lifeng Chen,Xiangbiao Yin,Mohammed F. Hamza,Yuezhou Wei,Shunyan Ning
Recycling rare earth elements (REEs) from NdFeB magnets alleviates the growing demand for these resources and contributes to environmental protection. Phosphate groups are known for their high adsorption selectivity for rare and precious metals. In this study, a novel phosphorus-functionalized silicon-based adsorption material (PPA@APTES/SBA-15) was synthesized using poly (ethylene glycol)- block -poly (propylene glycol)- block -poly (ethylene glycol) copolymer (P123) as a template, tetraethyl orthosilicate (TEOS) as a silicon source, (3-amino-propyl) trimethoxysilane (APTES) as a coupling agent, and phosphite ester as a functional ligand. This material was designed for the adsorption and separation of Nd and Dy from NdFeB leaching simulants. The batch experiments revealed that PPA@APTES/SBA-15 achieved equilibrium separation of Co and REEs within 10 s, with SF REE/Co ≥ 2018.76. The material exhibited near 100 % adsorption efficiency for Nd and Dy in 6 M HCl solution, along with excellent reusability. Notably, column experiments also demonstrated near complete adsorption efficiency for Nd and Dy. SEM-EDS, TEM, XRD, and N 2 adsorption-desorption isotherms confirmed that PPA@APTES/SBA-15 possessed a uniform hexagonal mesoporous structure and a high specific surface area. TG-DSC analysis demonstrated that the organic loading of PPA@APTES/SBA-15 was 9 %. FT-IR, XPS, and DFT analysis suggested that PPA@APTES/SBA-15 bond metal ions via P OH (P O) groups.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 8
·1721
·
IF 4.2
Shoudong Wang,Lei Zhou,Hongyun Qin,Zixu Dong,Haoyuan Li,Bo Liu,Zhilu Wang,Lina Zhang,Qiang Fu,Xia Chen
Hydrofluorocarbons (HFCs) have important applications in different industries; however, they are environmentally unfriendly due to their high global warming potential (GWP). Hence, reclamation of used hydrofluorocarbons via energy-efficient adsorption-based separation will greatly contribute to reducing their impact on the environment. In particular, the separation of azeotropic refrigerants remains challenging, such as typical mixtures of CH2F2(HFC-23) and CHF3(HFC-32), due to a lack of adsorptive mechanisms. Metal–organic frameworks (MOFs) can provide a promising solution for the separation of CHF3–CH2F2mixtures. In this study, the adsorption mechanism of CHF3–CH2F2mixtures in TIFSIX-2-Cu-i was revealed at the microscopic level by combining static pure-component adsorption experiments, molecular simulations, and density-functional theory (DFT) calculations. The adsorption separation selectivity of CH2F2/CHF3in TIFSIX-2-Cu-i is 3.17 at 3 bar under 308 K. The existence of similar TiF62−binding sites for CH2F2or CHF3was revealed in TIFSIX-2-Cu-i. Interactions between the fluorine atom of the framework and the hydrogen atom of the guest molecule were found to be responsible for determining the high adsorption separation selectivity of CH2F2/CHF3. This exploration is important for the design of highly selective adsorbents for the separation of azeotropic refrigerants.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Chaohui He,Yong Wang,Yang Chen,Xiaoqing Wang,Jiangfeng Yang,Libo Li,Jinping Li
The separation of propane (C 3 H 8 ) from propylene (C 3 H 6 ) to obtain high purity C 3 H 6 as a petrochemical raw material is an important, but challenging process. In the traditional industrial process, the separation mainly relies on energy-intensive cryogenic distillation. One alternative process that is currently becoming more attractive in the separation of C 3 H 6 is adsorptive separation technology. Using porous materials, especially C 3 H 8 selective adsorbents, high purity C 3 H 6 can be directly obtained and thus, significantly simplifies the process. Herein, a series of functionalized ligands were introduced into UiO-type materials to finely regulate the C 3 H 8 separation performance. Single-component adsorption isotherms reveal that BUT-10 has a distinct binding affinity for C 3 H 8 over C 3 H 6 over a wide range of temperature from 298 to 338 K and thus, achieved by far the highest C 3 H 8 capture capacity (105 cm 3 g −1 at 0.1 bar and 298 K) reported among the C 3 H 8 -selective materials reported to date. A combination of Grand Canonical Monte Carlo and density-function theory simulations demonstrate that the favorable pore environment provided by the multiple host-guest interactions toward C 3 H 8 result in the higher C 3 H 8 binding affinity observed in the separation process. Breakthrough experiments indicate that BUT-10 can selectively separate C 3 H 8 from C 3 H 8 /C 3 H 6 (1/1 and 1/15, v/v) mixtures and thus, directly produces high purity C 3 H 6 (>99.99%) under ambient conditions.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Yongwei Chen,Houxiao Wu,Daofei Lv,Renfeng Shi,Yang Chen,Qibin Xia,Zhong Li
In the petrochemical industry, ethane/ethylene (C2H6/C2H4) separation is one of the most important processes. Herein, we reported an iron-based metal–organic framework MIL-142A for efficiently trapping C2H6 from C2H6/C2H4 mixture, exhibiting preferential adsorption of C2H6 over C2H4. After various characterization techniques to confirm the successful preparation of MIL-142A, the C2H6 and C2H4 adsorptive separation performance was systematically investigated. Results showed that MIL-142A had remarkably higher C2H6 adsorption capacities than that of C2H4 at 298, 288, and 278 K, such as C2H6 and C2H4 adsorption capacities of 3.8 and 2.9 mmol/g at 298 K and 100 kPa, respectively. In addition, the C2H6 and C2H4 adsorption heats were relatively low and in the corresponding ranges 27.3–25.1 and 26.2–23.8 kJ/mol, which is a favorable property for the regeneration of MIL-142A with less energy penalty. Furthermore, it was inferred that the difference between the adsorption heat for C2H6 and C2H4 with the MIL-142A framework governed the selective adsorption of C2H6 over C2H4. The ideal adsorbed solution theory (IAST) selectivity of C2H6/C2H4 was high up to 5.8 in the initial low pressure and then decreased to 1.5 at 298 K and 100 kPa. Besides, breakthrough experiments also corroborated its efficient separation of C2H6/C2H4 mixture. Additionally, MIL-142A had excellent moisture stability, and its framework remained still intact after being exposed to humid conditions (80% RH) for 15 days. These comprehensive properties demonstrated that this unique material MIL-142A, as a high-performance C2H6-selective adsorbent, can be potentially used for highly adsorptive separation of the C2H6/C2H4 mixture.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Qiang-Qiang Yang,Zhi-Han Ma,Qiang Zhang,Zi-Han Song,Hong-Xiang Nie,Jing-Jing Pang,Zhao-Quan Yao,Hongliang Huang,Min Feng,Tong-Liang Hu,Jian Xu
One-step adsorptive separation of high-purity ethylene (C 2 H 4 ) from the mixtures with ethane (C 2 H 6 ) or propylene (C 3 H 6 ) is of crucial importance in the petrochemical industry. Nevertheless, the development of porous materials that possess both high adsorption capacities and selectivities of C 2 H 6 and C 3 H 6 over C 2 H 4 is still a formidable challenge. Herein, we present a microporous pillar-layered metal–organic framework (MOF) that exhibits excellent uptake capacities of C 2 H 6 (4.73 mmol g −1 ) and C 3 H 6 (8.05 mmol g −1 ) at 298 K and 1 bar, leading to high adsorption selectivities for equimolar mixtures of C 2 H 6 /C 2 H 4 (1.6) and C 3 H 6 /C 2 H 4 (16.4), respectively. Breakthrough column experiments demonstrate that the MOF could achieve one-step acquisition of polymer-grade C 2 H 4 (> 99.9 %) during C 2 H 6 /C 2 H 4 and C 3 H 6 /C 2 H 4 separations. Noteworthily, for a C 3 H 6 /C 2 H 4 mixture (2/5, v / v ), high-purity C 2 H 4 (> 99.9 %) and C 3 H 6 (> 99.5 %) can be directly harvested or recovered upon desorption, with high productivities of 86.23 and 31.05 L kg −1 , respectively, surpassing many well-developed adsorbents for C 3 H 6 /C 2 H 4 separation. Theoretical calculations reveal that the nonpolar pore surface bearing accessible N and O atoms affords more hydrogen bonding interactions with C 2 H 6 and C 3 H 6 than C 2 H 4 , accounting for the adsorption affinity in the order of C 3 H 6 > C 2 H 6 > C 2 H 4 . This work may offer valuable insights into the design and construction of high-performance MOFs for one-step C 2 H 4 purification.
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
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2020
·
IF 2.627
Xiujuan Li,Le Chen,Dandan Zhu,Song Yang,Zhong Wu,Mingyang He,Zhihui Zhang,Qun Chen
A novel ZIF-8-CMC hybrid material was fabricated from the hybridization of ZIF-8 and carboxymethylcellulose (CMC) by impregnation method for n -hexane/3-methylpentane separation. The surface properties of ZIF-8 were tailored by introducing CMC into ZIF-8 nanoparticles . In this work, adsorption separation of n -hexane ( n HEX) and 3-methylpentane (3MP) on ZIF-8-CMC were investigated by batch vapor-phase adsorption and liquid-phase breakthrough adsorption. The adsorption selectivity of n HEX/3MP reversed from preferable adsorption of n HEX to preferable adsorption of 3MP upon the increasing of CMC containing in the hybrid materials. As the temperature increases, the adsorption amounts of n HEX and 3MP decrease. With the increasing of CMC contents, the n HEX uptake decreased, the uptake capacity of 3MP increased gradually. For liquid-phase breakthrough adsorption, the dynamic adsorption capacity of n HEX also decreased with the increasing of temperature.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yong-Sheng Wang,Tian-Yi Li,Ya-Qi Ba,Zhe Zheng,Guang-Ping Hao,An-Hui Lu
Adsorptive separation of propylene/propane is an energy efficient way to produce high purity propylene, which is an essential chemical for the production of a variety of important monomers/polymers. The central task is to devise porous materials that can recognize the subtle difference between propylene/propane. The understanding of the selective adsorption and dynamic diffusion behaviors in nanopores at different length scales is key for efficient separation, however, remains elusive. Here we target at this issue by devising “mortar-and-cobblestone” type carbon pellets (MCCs) as model adsorbents, which showed tunable combinations between micropores and mesopores. As the volume ratio of mesopore to micropore increases from 0.37 to 1.33, the adsorption capacity of propylene increases from 2.4 to 2.9 mmol g −1 at 100 kPa and 298 K, and its diffusion rate is 3.28 times increased. In particular, the adsorption of propane displays a unique two-step diffusion behavior in the MCCs, which quantifies the contribution of the mass transport mesopores and gas sieving micropores to their adsorptive separation. In addition, the MCCs are in pellet form and mechanically strong with a compressive strength of 17.4 MPa, which further ensures their potential in molecular separation practice.
研究领域:
材料科学
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化学工程
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高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2012
·Vol. 88
·期 3
·437-443
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IF 2.168
Min Jia,Hongmin Cui,Weiqun Jin,Lili Zhu,Yu Liu,Ji Chen
BACKGROUND: Rhenium is a rare and valuable metal coexisting with molybdenum in molybdenite and sulfide copper ores and is hard to separate. Methods such as solvent extraction, ion exchange, adsorption, precipitation, etc. have been used to separate and purify Re(VII), and resin ion exchange has been widely investigated and used owing to its convenient operation and relatively low-cost. The main challenge comes from the preparation of resins having high performance and stability. In an earlier study, an N-methylimidazolium functionalized strong basic anion exchange resin was successfully synthesized and used for Cr(IV) extraction. This paper, reports on further synthesis and application of this resin for adsorption and separation of Re(VII) and Mo(VI), especially from copper arsenic filter cake. RESULTS: At pH 6.25, Re(VII) and Mo(VI) can be effectively separated with the N-methylimidazolium functionalized strong basic anion exchange resin, giving a Re(VII) recovery of up to 93.3%, but only 5.1% for Mo(VI). When using the copper arsenic filter cake sample 89.1% Re(VII) recovery was achieved. CONCLUSION: The N-methylimidazolium functionalized strong basic anion exchange resin exhibited high selectivity and recovery for Re(VII) in a mixed system. © 2012 Society of Chemical Industry
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2021
·
IF 5.876
Anqi Sun,Ying Wu,Zhenjiang He,Peng Bai,Jiafei Lyu,Xianghai Guo
The flexible metal-organic framework MIL-53(Cr) has been demonstrated to be an efficient adsorbent for liquid phase adsorption and separation, while the effect of this attractive “breathing effect” on its performance remains uncertain. In this research, by increasing the amount of introduced water, MIL-53(Cr) first shrank into a narrow pore form through bound water and then reopened due to the introduction of free water. Using MIL-53(Cr) with diverse amounts of water as an adsorbent, the liquid-phase adsorption and separation of C8 aromatics, including o -xylene (OX), p -xylene (PX), m -xylene (MX) and ethylbenzene (EB), was manipulated by the pre-adsorbed water in MIL-53(Cr). Pre-adsorbing water in MIL-53(Cr) induced a preference reversal between MX and PX, where dry samples preferentially adsorbed MX, while high-water-addition samples preferred PX instead. In addition, the reopened MIL-53(Cr) with high water addition hardly adsorbed EB, thereby increasing the selectivity of xylene isomers to EB. A longer equilibrium time was observed on MIL-53(Cr) with high water addition, during which the adsorption preference shifted from OX to MX to PX. Further molecular simulation provided a microscopic explanation that water molecules in the pores tended to package around MX and EB, hindering their interaction with frameworks or other adsorbates.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）