CHEMICAL ENGINEERING SCIENCE
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2024
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IF 4.1
Chunjie Liu,Hua Huang,Haiyan Zhang,Liang Chen
Bio-butanol as a renewable energy can be produced through biomass fermentation. Among these, the adsorption-based technique is the most energy-efficient. However, the adsorption of small amounts of butanol from the aqueous phase remains a challenge. In this work, poly (methyl methacrylate)-based (PMMA) cryogel particles with tunable polarity and a super-macroporous structure were prepared by combining a simple dropping method and sulfolane freeze casting. The maximum adsorption capacities of the PMMA cryogel particles using the batch shaking and fixed-bed were 520.2 and 1442.2 mg/g, respectively. Adsorption rate constant of amphiphilic cryogel particles increased by approximately 9–40 times compared with PMMA cryogel particles. Adsorption capacity of the PMMA-based cryogel particles was maintained at 99 % of the initial adsorption capacity after 10 cycles. This study presented a strategy for the design of adsorbents with super-macroporous structures and hydrophilic modification to facilitate the adsorption of hydrophobic butanol from the aqueous phase system.
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 AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Xianjie Wang,Jingdong Gou,Louwei Cui,Jinhui He,Xue Ma,Yaning Zhao,Liuyi Pan,Huiyong Chen,Zhe Jin,Hongyan Wang,Yonghong Zhu,Dong Li
The separation of ethylcyclohexane (ECH) from coal-based C8 naphthenic oil mixtures poses significant industrial challenges due to their similar physicochemical properties. Herein, we investigate the separation performance of carbon molecular sieves with varying pore sizes and oxygen content through dynamic breakthrough experiments and pulse testing with real industrial feedstocks. The results demonstrate that CMS-100 exhibits superior separation efficiency for ECH with an adsorption selectivity of 1.9 (ECH/ trans -1, 2-dimethylcyclohexane) as well as ECH uptake of 49 mg/g, achieving a separation factor of 0.48, attributed to its optimal microporous structure (0.64–0.86 nm). In contrast, CMS-75, characterized by a larger mesopore volume (2–20 nm), facilitates faster desorption rates, aiding in molecular transport. Grand canonical Monte Carlo (GCMC) simulations confirm that variations in substituent arrangement influence the diffusion rates of C8 cycloalkanes within the pore channels, while oxygen-containing functional groups enhance the interaction energies between C8 cycloalkanes and the adsorbent, particularly for ECH, whose larger ethyl group and electronic effects result in stronger adsorption affinity compared to DCH isomers. However, the presence of oxygen functionalities negatively impacts overall adsorption capacity by introducing steric hindrance. These findings underscore the importance of precisely optimizing both pore size distribution and surface chemistry for efficient hydrocarbon separation. This work provides a solid foundation for developing next-generation adsorbents aimed at industrial-scale separation of naphthenic oils.
研究领域:
化学工程
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材料科学
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高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
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2024
·Vol. 102
·期 10
·3532-3549
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IF 1.6
Wen Jiang,Shifeng Miao,Yujie Yang,Yu Long
This research endeavour aims to investigate the adsorptive separation of the branched chain (BCAA) and aromatic amino acids (AAA). Based on the different molecular sizes of BCAA and AAA, zeolitic imidazolate frameworks (ZIFs) with different pore structures were prepared by regulating the size of imidazole ligands. The structure and pore shape were characterized by Fourier transform infrared spectroscopy (FT-IR), x-ray diffraction (XRD), scanning electron microscope (SEM), and BET surface area (BET). The results indicated the successful synthesis of ZIF-[Co(mIm) 2 ], ZIF-[Co(eIm) 2 ], and ZIF-[Co(pIm) 2 ] with pore size distribution of 7.821, 6.943, and 9.394 Å, and particle size of these ZIFs was approximately 4 μm. ZIF-[Co(eIm) 2 ] was chosen as the optimal ZIFs for the separation of BCAA and AAA. The adsorption experiment was evaluated in the respective single and binary systems. The corresponding data in a single system demonstrated that ZIF-[Co(eIm) 2 ] showed good adsorption performance for BCAA and poor for AAA. Furthermore, the adsorption behaviour under experimental conditions conformed well to the pseudo-second-order kinetic model and Langmuir isotherm. ZIF-[Co(eIm) 2 ] had great separation ability for BCAA/AAA in their binary system. Finally, regeneration studies further manifested that ZIF-[Co(eIm) 2 ] exhibited fine reusability performance with adsorption efficiencies still higher than 70% after five cycles. This study exhibits a novel path for the design of adsorbents for efficient separation of BCAA/AAA.
研究领域:
生物化学
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材料科学
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分离技术
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2024
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IF 3.2
Le Chen,An Xie,Nan Zhang,Jianjun Yin,Qun Chen,Mingyang He,Zhihui Zhang
Zeolitic-Imidazolate Framework 8 (ZIF-8), a porous crystalline absorbent, could be synthesized from the coordination reaction of zinc ions and 2-methylimidazole (2-mIM). ZIF-8 has a large specific surface area and a high adsorption capacity for n -hexane ( n HEX). However, ZIF-8 suffers from low selectivity for both linear and mono-chain alkanes. Therefore, ZIF-8 was modified through 2-mIM ligand being partly replaced by 2-nitroimidazole (2-nIM) through Vapor-Phase post-synthesis modification. The modified materials were denoted as ZIF-8-2-nIM-X (X = 24h, 48h, 72h). ZIF-8-2-nIM-X has a higher specific surface area and better thermal stability than ZIF-8. Further thermodynamic and kinetic calculations show that the affinity of hexane isomers on ZIF-8-2-nIM-X is spontaneous physical adsorption combined with an exothermic process. In contrast, kinetic studies show that the adsorption of hexane isomers on ZIF-8-2-nIM-X is a pseudo-second-order kinetic model. The batch and dynamic adsorption and separation properties of ZIF-8-2-nIM-X for hexane isomers were studied. The results of the one-component vapor adsorption equilibrium experiment show that ZIF-8-2-nIM-72h has the best adsorption separation coefficient at 293 K. The adsorption capacity of n HEX and 3-methylpentane (3MP) were 211.63 mg/g and 33.91 mg/g, respectively. Compared with ZIF-8 (selectivity coefficient: 1.08), the adsorption selectivity coefficient of the modified material is greatly improved. The adsorption selectivity coefficient of n HEX/3MP is 6.24 (ZIF-8-2-nIM-72h).
研究领域:
材料科学
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物理化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Panpan Liu,Jiafei Lyu,Peng Bai
MOFs/polymer hybrid membranes combine the unique structural activity of MOFs with the excellent carrying capacity of porous polymers, exhibiting remarkable adsorption/separation properties. In this study, a robust defective MOFs material Al-UiO-66 was synthesized by doping Al into UiO-66 material through one-step in-situ synthesis method, which increased the pore size distribution of MOF material. Al-UiO-66 nanoparticles were blended within polyvinylidene fluoride (PVDF) casting solution to fabricate a novel Al-UiO-66-MMM using the phase conversion techniques. The Al-UiO-66-MMM demonstrated excellent solid–liquid separation, avoiding the shortcomings of MOFs such as potential secondary pollution and poor separation performance. It was investigated for the adsorptive removal of six typical dyes with different charges and molecular sizes including cationic Malachite Green (MG), Rhodamine B (RhB), Janus Green B (JGB) and anionic Methyl Orange (MO), Methyl Yellow (MY) and Reactive Black 5 (RB5). Al-UiO-66-MMM exhibited much enhanced removal rates exceeded 99 % for MO, MY, and MG while low adsorption for large molecular dyes RhB, JGB, and RB5, indicating a size exclusion effect. In the separation process of binary mixed dyes with different molecular sizes, the removal rates of the target dyes all reached around 99 %, demonstrating excellent selective adsorption. Additionally, the membrane exhibited outstanding recyclability with over 90 % removal rate with high selectivity after 10 cycles. The outstanding stability, efficient selectivity, sustained cyclic adsorption performance, and good portability, makes Al-UiO-66-MMM highly promising for applications in treating dye-containing wastewater.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 7
·514
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IF 4.3
Man Zhou,Yanli Zhou,Minmin Ni,Yuzhe Zhang,Song Xu,Hao Ma,Jian Zhou,Jin Zhao,Liwei Lin,Zhongyu Li
Superior selective adsorption of organic dye is still a big challenge in the process of dye wastewater treatment. Meanwhile, low-price and environmentally friendly biomass-based adsorbents show huge potential in the fields of separation and purification. In this study, we adopted the “hydrolysis–calcination method” to develop a novel in situ anchoring strategy for ultrasmall TiO2−xon carbonized bacterial cellulose (CBC), which was derived from natural bacterial cellulose. Notably, 3D networks of porous CBC played a dual role for both providing hydrolytic sites and controlling the oxygen vacancies (Vo) of TiO2−x. As for the single-dye adsorption, the TiO2−x/CBC had a strong adsorption ability (101.4 mg/g) for removing methylene blue (MB), which was much higher than that of methyl orange (MO), malachite green (MG), rhodamine B (RhB), and tetracyclines (TC). Moreover, under the optimized carbonization temperature (Tc) of 300 °C, the TiO2−x/CBC-300 exhibited an outstanding separation efficiency of 97.07% for the MB/MO solution. Detailed analysis confirmed that Tcwas a key regulator for adjusting the Voconcentration, which directly influenced the surface charge density and, further, the separation efficiency of TiO2−x/CBC. Additionally, the used adsorbent could be easily regenerated from washing by ethanol. After 4 regenerations, the adsorption efficiency declined only by 6.9% after 20 min and 13.6% after 120 min adsorption, respectively. Ultimately, this oxygen vacancy-rich TiO2−x/BC system illuminated good prospects for mixed dye wastewater adsorption and separation.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
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IF 3.573
Yu Zhao,Jun Xu,Jing Wang,Jinglan Wu,Meizhen Gao,Bin Zheng,Hong Xu,Qi Shi,Jinxiang Dong
The objective of this work is to study the adsorptive separation of the biomass-derived furfural (Fur) and 5-hydroxymethylfurfural (5-HMF). Because Fur and 5-HMF have similar ellipsoidal shapes, the diffusion of the larger 5-HMF may be blocked by the elliptical window of adsorbents. Thus, two zeolitic imidazolate framework (ZIF) materials with the identical chemical composition, MAF-6 and MAF-5, were used as spherical and ellipsoidal pore adsorbents, respectively. In the dynamic column adsorption of a binary-component system (Fur/5-HMF, 5/5 wt %) in an aqueous solution, the adsorption amounts of Fur on MAF-6 display a 13% decrease compared with the single-component system, whereas the adsorption amounts of Fur on MAF-5 are identical to those obtained in the single-component system and the amounts of adsorbed 5-HMF are almost negligible. Thus, the Fur/5-HMF selectivity is only 6.4 for MAF-6, whereas the selectivity reached 115.8 for MAF-5. The results show that the narrow elliptical window/ellipsoidal tile of MAF-5 enhanced separation selectivity compared with the larger circular window/spherical cage of MAF-6. In addition, the general rate model and density functional theory calculations further verify that the elliptical window of MAF-5 exhibits a strong mass-transfer barrier that must be overcome for the diffusion of the larger 5-HMF molecules.
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
·
2020
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IF 3.573
Juanjuan Dai,Danyan Xie,Ying Liu,Zhiguo Zhang,Yiwen Yang,Qiwei Yang,Qilong Ren,Zongbi Bao
Supramolecular metal–organic frameworks (SMOFs) are emerging as a new family of porous materials. In this work, a SMOF, [Cu2(ade)4(H2O)2](SiF6)2 (SMOF-SIFSIX-1, ade = adenine) was successfully synthesized from the cationic complex of copper and adenine and hexafluorosilicate anions by a slow diffusion method and was demonstrated for trapping carbon dioxide in preference to methane and nitrogen. With one-dimensional pores of about 3.6 × 3.6 Å to induce their distinguishing interactions with the three components, SMOF-SIFSIX-1 exhibited excellent selective gas sorption behaviors for CO2/CH4 (50:50) and CO2/N2 (15:85) gas mixtures with ideal adsorbed solution theory selectivities of 21.1 and 131.7 at 273 K and 100 kPa pressure, respectively, outperforming most of reported hydrogen-bonded organic frameworks so far. Neutron powder diffraction and DFT-D calculations were also carried out to investigate the CO2 adsorption configuration on SMOF-SIFSIX-1a, which suggested that this framework catch CO2 due to “C···F” and “O···H” supramolecular interactions between CO2 molecules and SMOF-SIFSIX-1a. This study demonstrates that the rarely studied SMOF material shows promising potential in gas adsorption separation.
研究领域:
材料科学
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环境科学
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高影响因子
Analytical Methods
·
2013
·Vol. 5
·期 20
·5471-5477
·
IF 1.855
Shan Yang,Yuzhi Wang,Minli Xu,Meizhi He,Min Zhang,Dan Ran,Xiaopin Jia
A simple molecularly imprinted polymer (MIP) was prepared to recognize the template lysozyme (Lys). Chitosan (CS) was selected as the functional biopolymer to enhance the adsorption capacity. The aldehyde group was introduced to CS, so that the template protein could be immobilized onto the modified CS beads. After the template protein was successfully immobilized, two kinds of organic siloxane, tetraethoxysiloxane (TEOS) and 3-aminopropyl triethoxysilane (APTES), were added and polymerized via a sol–gel process in aqueous solution at 25 °C. After template removal, adsorption experiments were performed to study the properties of the synthesized MIP. The results showed that the MIP exhibited much higher adsorption capacity for Lys than the non-imprinted polymer (NIP). The theoretical maximum adsorption capacity (Qmax) and equilibrium constant (KL) were determined by the Langmuir model, which turned out to be 15.89 mg g−1 and 6.78. The selectivity of the MIP was verified by direct adsorption of a single reference protein and mixed protein. The UV measurement and sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) analysis results showed the MIP had a relatively high adsorption capacity and excellent selectivity, which made it possible to remove the template protein from different sample solutions.
研究领域:
生物化学
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材料科学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
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IF 7.2
Zhiyi Xu,Zhuofeng Sheng,Shaojuan Chen,Shuhua Li,Yaojie Liu,Long Jiang,Weizhi Sun,Chao Xu,Mo Xian
There are bottlenecks in the synthesis and purification of fine chemicals, such as high energy consumption and complex processes. Process optimization and green separation technology innovation are the key challenges for green chemistry and sustainable production. (S)-2,2-dimethyl-4-(2-hydroxyethyl)-1,3-dioxolane (dioxolane), as an important pharmaceutical and chemical intermediate, has limited its market application due to technical bottlenecks such as low synthesis efficiency and low purity. In this study, an efficient and green synthesis of dioxolane was established for the first time to avoid the generation of toxic chelated borate esters, and the purity of the product reached 99 %. Firstly, to address the low efficiency issue in dioxolane synthesis, we developed a novel synthetic route utilizing a tetrahydropyranyl (THP) protecting group strategy with (L)-malic acid as the starting material. Through response surface optimization of the key-step reduction reaction, the yield improved from 54 % to 91 %. Secondly, to address the problem of reduced purity caused by byproduct dioxane, we leveraged the size-matching effect between dioxane and the material, preparing seven materials with diverse physical structures via Friedel-Crafts alkylation. Notably, DCE-3A achieved selective separation of dioxolane and dioxane with a selectivity coefficient of 103.07. Through adsorption separation, dioxolane exhibited a purity of 99 % and a yield of 94 %, markedly outperforming the traditional derivatization separation method (purity 98 %, yield 50 %). In summary, the synergistic effect of the innovative protecting group strategy and the novel adsorbent achieved the efficient synthesis of dioxolane, offering a technical approach for the green synthesis of analogous compounds.
研究领域:
化学工程
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绿色化学
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高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2020
·Vol. 326
·期 2
·1323-1331
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IF 1.137
Wu Hao,Kubota Masahiko,Osawa Naoki,Kim Seong-Yun
Adsorption and separation performances of a microporous silica-based (DAMIA-EH + TOA)/SiO 2 -P adsorbent towards Pd(II) were systematically investigated under the effect of contact time, temperature, concentration of nitric acid, chromatography etc. in a simulated high-level liquid waste containing 14 kinds of representative co-existing metal ions. Successful recovery of around 97.95% Pd(II) was achieved under the elution with 0.01 M Tu (pH = 2) solution in column experiment.
研究领域:
化学工程
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环境科学
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高影响因子
CELLULOSE
·
2019
·Vol. 26
·期 9
·5571-5582
·
IF 3.917
Zheng Xudong,Zhang Yi,Bian Tingting,Wang Dandan,Li Zhongyu
Previously, we investigated imprinted silica films templated by cellulose nanocrystals for the selective adsorption of rare earth ions from acidic systems, but the cost of organosilane limits the application of silica film adsorbents. Considering the cost and outstanding properties of cellulose, converting this renewable biological resource into an adsorbent material is a vital step towards sustainable development. One-step fabrication of imprinted mesoporous cellulose nanocrystals films (IMCFs) was implemented via ionic imprinting technology and they were applied to efficiently and selectively separate neodymium ions [Nd(III)]. Transmission photographs clearly demonstrated there is a highly ordered mesoporous structure after removal of silicon source. Nitrogen adsorption measurements showed two obtained materials possess high specific surface area, providing a good premise for efficient separation. When employed as absorbents, the maximum adsorption capacity of IMCFs is almost three folds than that of NIMCFs, reaching 18.22 mg g −1 . The distribution coefficient of IMCFs for Nd(III) reached 435.46 mL g −1 , much higher than other interfering ions. Repeatability tests showed IMCFs retained 81.55% of initial adsorption capacity after five adsorption cycles. In summary, this work presents a new avenue to construct imprinted mesoporous cellulose nanocrystals films for separation of rare earth ions.
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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DOI
高影响因子
危险品化学品经营许可证（带存储）