RENEWABLE ENERGY
·
2022
·
IF 8.634
Zhuoheng Tu,Ping Zhang,Mingzhen Shi,Xiaomin Zhang,Youting Wu,Xingbang Hu
Efficient recovery of CO and H 2 from offgas streams is environmentally and economically meaningful from the view point of the wide use of syngas (CO/H 2 ) in the chemical industry. This work reports selective and simultaneous separation of CO and H 2 from N 2 using protic chlorocuprate ionic liquids (PCILs)-based membranes. The chemical structures of the prepared PCILs were characterized using FTIR , NMR and ESI-MS, and the thermal stability, melting points, viscosity and density of PCILs were determined. The morphology and elemental distribution of PCIL-based membranes were characterized by SEM and EDS. Facilitated transport of CO is observed in these membranes, and the CO permeability is up to 178.3 barrers (0.1 bar, 40 °C) in [TEAH][CuCl 2 ], with a CO/N 2 selectivity of 26.2. H 2 permeability and H 2 /N 2 selectivity are also found to reach 198.2 barrers (0.5 bar, 40 °C) and 29.1, respectively. The permeability of CO and the selectivity of CO/N 2 can be further optimized to 405.9 barrers and 69.9 by altering the Cu(I) content, respectively. In addition, the selectivity of CO/H 2 can be tuned drastically via varying the Cu(I) content (from 0.77 to 12.0) and the operating temperature (from 2.14 to 0.42), which may be applied to the composition adjustment of syngas. In a word, this work offers a new strategy for designing IL-based membranes that used for CO and H 2 capture.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Jingwei Lu,Fangchao Li,Gan Miao,Xiao Miao,Guina Ren,Bo Wang,Yuanming Song,Xiangming Li,Xiaotao Zhu
Traditional membrane-based separation methods are limited by the inability of a single membrane to separate both oil/water and oil/oil mixtures. Herein, to address this challenge, we have produced a superhydrophilic/superoleophobic shell powder coating that can be used as an advanced separation membrane for separating oil/water mixtures, emulsions, and oil/oil mixtures, when coated on a copper mesh and fabric. Utilizing its water-affinity and oil-repellency, the separation membrane can separate oil/water mixtures and emulsions with high separation efficiency. Interestingly, our separation membrane displays opposite wetting behavior between high-polar oils and low-polar oils, and utilizing this selective wetting to oils with different polarity, oil/oil mixtures separation is achieved effectively, even if the surface tension difference between two oils is as small as 2.4 mN/m. Using an ethanol-prewetting strategy, on-demand oil/water and oil/oil separation are also achieved on this separation membrane. This study is expected to present a promising approach to membrane-based separation technologies.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
Micro & Nano Letters
·
2017
·Vol. 12
·期 10
·744-748
·
IF 0.723
Ziai Liu,Xuyue Wang,Jinlong Song,Tamal Roy,Shude Li,Jiyu Liu,Liu Huang,Xin Liu,Zhuji Jin,Danyang Zhao
Oil pollution brings great challenge to environmental protection. Utilising oil–water separation device to separate and recycle oils is an environment-friendly approach to dispose mixtures containing oils. Pouring-type gravity-driven oil–water separation method based on extremely wettable materials is an interesting area of research because of its high separation velocity, selectivity and purity. However, the presence of water bridge results in low separation efficiency. Herein, the authors first synthesised a facile etching method and a dip-coating method to fabricate contrary extreme wettability sponges including superhydrophilic–underwater-superoleophobic (SHI–U-SOO) sponge and superhydrophobic–superoleophilic (SHO–SOI) sponge. Accordingly, they designed a three-way oil–water separation system whose left and right bottom tubes were installed with the SHI–U-SOO sponge and the SHO–SOI sponge, respectively. Water and oil separately flow out from the left and right tubes, thereby eliminating the water bridge and increasing separation efficiency, and still having ideal separation selectivity and separation purity. The developed three-way oil–water separation system has promising application prospects in disposing oil spills, oil leakage from factories and industrial effluents.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
PROCESS BIOCHEMISTRY
·
2019
·
IF 2.883
Panliang Zhang,Wanru Wang,Guilin Dai,Shichuan Wang,Weifeng Xu,Kewen Tang
Symmetric and asymmetric separations of bisoprolol (BS) enantiomers were performed by fractional extraction with iso-butyl-L-tartrate (LT) as chiral extractant. The extraction process is complicated involving multiple chemical equilibrium, and the fractional extraction efficiency is strongly influenced by pH, boric acid (BA) and LT concentration, number of transfer units (NTU), feeding position, and phase ratios. An interfacial reaction phase equilibrium model was established and verified by experiment. A multistage model was further developed to model the extraction process to achieve the optimal operational parameters. Under the optimized parameters, S-bisoprolol (S-BS) was obtained by symmetric and asymmetric separations of racemic BS in a cascade of 10 centrifugal contactor separators (CCSs). The ee of S-BS in organic phase obtained by symmetric and asymmetric separations are 0.753 and 0.942, respectively. The relative errors of 3.12% and 4.24% show experiment is in good agreement with predictions. The required number of stage is greatly reduced to obtain high enantiomeric excess (ee) of S-BS by asymmetric separation.
研究领域:
药学
·
化学工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 46
·28863-28875
·
IF 3.361
Yu Qin,Li Xu,Liying Liu,Xiaoyu Deng,Yucheng Gao,Zhongwei Ding
A novel gas separation approach is proposed in this work by combining an amine-based solid adsorbent with a zeolitic imidazolate framework-8 (ZIF-8) membrane. This was achieved by incorporating the amine-based solid adsorbent during the fabrication of the ZIF-8 membrane on a macroporous substrate. An amine-based solid adsorbent was prepared using porous ZIF-8-3-isocyanatopropyltrimethoxysilane (IPTMS) and N-[(3-trimethoxysilyl)propyl]diethylenetriamine (3N-APS) amine compounds. The as-prepared porous amine-based solid adsorbent (denoted as ZIF-8-IPTMS-3N-APS) possessed excellent adsorptive CO2/N2 and CO2/CH4 separation performances. As the adsorbent needs to be regenerated, this could indicate that the CO2 adsorption separation process cannot be continuously operated. In this work, an amine-based solid adsorbent was applied during the preparation of the ZIF-8 membranes owing to the following reasons: (i) gas separation by the membrane can be operated continuously; (ii) the amino group provides a heterogeneous nucleation site for ZIF-8 to grow; and (iii) the reparation of surface defects on the macroporous substrate can be performed prior to the growth of the ZIF-8 membrane. Herein, the ZIF-8 membrane was successfully fabricated, and it possessed excellent CO2/CH4, CO2/N2, and H2/CH4 separation performances. The 0.6 μm ultrathin ZIF-8 membrane demonstrated a high CO2 permeance of 4.75 × 10−6 mol m−2 s−1 Pa−1 at 35 °C and 0.1 MPa, and ideal CO2/N2 and CO2/CH4 selectivities of 4.67 and 6.02, respectively. Furthermore, at 35 °C and 0.1 MPa, the ideal H2/CH4 selectivity of the ZIF-8 membrane reached 31.2, and a significantly high H2 permeance of 2.45 × 10−5 mol m−2 s−1 Pa−1.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2022
·
IF 8.035
Chen Li,Chuncai Zhou,Wenwen Li,Wenrui Zhu,Jiaqian Shi,Guijian Liu
The increasing demand for critical elements and the depletion of conventional ores have stimulated the recovery of critical elements from secondary resources. The concentration of critical elements in coal fly ash (CFA) are significant, which makes it a potential alternative source for the recovery of critical elements. Preconcentration treatment is an important step to recover critical elements, which not only directly affects the subsequent leaching and extraction efficiency, but also determines the reagent and energy consumption. The distribution and enrichment characteristics of critical elements in different physical separation fractions of CFA are worthy of further elucidation. In this paper, the physicochemical characteristics and the modes of occurrence of critical elements (Li, Be, Rb, Sr, Zr, Nb, Cs, Hf, Ta, Ga, Ge, Se, Cd, Tl, In, Te, and Re) of CFA from Pingwei power generation plant in Huainan, Anhui Province, China were investigated, with emphasis on several physical (particle size, density, magnetic) separation methods and the enrichment characteristics of critical elements in each physical fraction. The density and magnetic separation of CFA after particle size classification was proposed, and different sorting combinations were adopted for various types of critical elements, to achieve efficient enrichment of critical elements. The results show that the critical elements in CFA are mainly enriched in the residual state, which consists of aluminosilicate minerals and amorphous glass. The CFA with greater recovery potential exists in smaller particle size. Higher Rb, Sr, Zr, and Cs concentrations were found in the low-density fractions of fine particle size CFA, while Li, Be, and Ga are mainly enriched in the non-magnetic fractions of fine particle size CFA. Some critical elements could be further enriched by density separation or magnetic separation of CFA after particle size classification. The combination of different physically separated fractions is considered as an effective way to maximize the enrichment of critical elements from CFA.
研究领域:
环境科学
·
矿物加工工程
·
资源回收技术
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Sainan Hu,Zhixiang Fu,Yongchao Chen,Chuyu Zhou,Zhengdong Fei
A novel polyvinylidene fluoride/bis(trimethoxysilylpropyl)amine (PVDF/BTMSPA) asymmetric composite membrane was fabricated through a one-step vapor-induced phase separation (VIPS) process. The hydrophilic BTMSPA monomers preferentially migrated to the membrane surface during VIPS, where they underwent hydrolysis and condensation to form a dense skin layer, while the hydrophobic PVDF matrix solidified into a porous support layer. By varying the VIPS duration, the skin layer structure could be tuned from porous to dense. At a VIPS time of 0.5 h, a spontaneously formed dense-skinned PVDF/BTMSPA composite membrane was achieved. The membrane demonstrated preferential adsorption of n-butanol over water, exhibiting optimal separation performance for a 4 wt% n-butanol/water mixture at 70 °C, with a flux of 1980 g/m 2 ·h and a separation factor of 63.65. This work not only provides a facile and efficient VIPS-based strategy for fabricating asymmetric composite membranes but also highlights the potential of PVDF/BTMSPA membranes for n-butanol/water separation applications.
研究领域:
材料科学
·
分离技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2015
·Vol. 4
·期 3
·568-580
·
IF 4.696
Fan Zhang,Jian Zhu,Hui-Qin An,Jian-Jun Li,Jun-Wu Zhao
In this work, a facile and effective two-step separation strategy that combined both CTAB and CTAC has been proposed that enables the purification of gold nanotriangles on a large scale. The resulting nanotriangles exhibit straight edges and sharp corners, with a narrower size distribution. The separation of size or morphology could be achieved by utilizing different surfactants. It was found that CTAB served as a size separation agent and CTAC served as a shape separation agent in the separation process. The optimum concentrations were found to be 0.167 M CTAB for size separation and 0.222 M CTAC for shape separation respectively. By simply adjusting the concentration and the sequence of CTAB and CTAC, we were able to exquisitely separate nanotriangles from the crude gold nanoparticles. Furthermore, the separation mechanism has also been discussed based on surfactant depletion-induced aggregation on different contact areas of the nanoparticles. The proposed two-step separation strategy holds great potential to be extended to the separation of other nanoparticles with anisotropic shapes and different sizes, improving the high yield of anisotropy with great uniformity, which will eventually facilitate SERS-based applications.
研究领域:
纳米技术
·
材料科学
✓ 已验证
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Zezhen Zhang,Zekun Zhou,Shuman Feng,Lili Wu,Shanjun Gao
Membrane-based separation technologies often face a trade-off between selectivity and permeability, which represents a significant technical challenge in current research. In this study, vacuum-assisted surface deposition technology was utilized to co -deposit piperazine (PIP) and MXene onto a polyvinylidene fluoride (PVDF) microfiltration membrane. This was followed by interfacial polymerization, initiated by trimesoyl chloride (TMC), to form a polyamide (PA) network, resulting in the fabrication of a conductive thin-film nanocomposite membrane (CTFN-2). The results showed that the CTFN-2 membrane had a uniform PIP-TMC/MXene coating with a distinctive wrinkled structure on its surface, contributing to its high permeate flux and solute rejection. The membrane's separation performance was evaluated using a custom-built low-pressure cross-flow conductive membrane setup. The CTFN-2 membrane selectively rejected various ionic dyes under both positive and negative voltages, with an increased rejection rate for inorganic salts as the voltage rose. Notably, after being stored in deionized water for 180 days, the CTFN-2 membrane maintained stable dye separation performance. This research offers a novel approach for developing efficient and controllable separation membrane materials.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
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
·
材料科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Fangge Chen,Yanhong Li,Aisheng Huang
Because of the increase of industrial wastewater containing insoluble oil and oil discharged accidents, oil/water separation has turned out an exceedingly crucial and urgent issue in environmental protection. Therefore, it is terribly significant to develop a simple and effective technology for oil/water separation. Membrane separation has been well known as a promising method to remove oils from water due to its energy-efficiency and cost-effectiveness. In the present work, we report the synthesis of a hydrophobic zeolite FAU named F-FAU through a simple and effective post-synthetic modification. Firstly, a thin zeolite FAU layer is grown on the 3-aminopropyltriethoxysilane (APTES) modified stainless steel net (SSN) to form SSN supported FAU (SSN@FAU) coating. And then, a hydrophobic SSN@F-FAU coating is prepared through post modification of SSN@FAU coating with perfluorooctyltriethoxysilane (POTS). After POTS modification, the water contact angle (CA) of the SSN@FAU coating increases from 15° to 132° for SSN@F-FAU coating, while both morphology and structure of the SSN@FAU coating keep unchangeable. Attributing to the high hydrophobicity of the F-FAU coating, the SSN@F-FAU coating shows a wonderful oil/water separation performance, with oil/water separation efficiency of above 98.8 % and oil flux of up 50,000 L m −2 h -1 . After 50 cycles successive separation of hexane/water mixture, the separation efficiency of the SSN@F-FAU coating keeps constant (over 99.1 %), showing potential application for oil/water separation in industries. Further, hydrophobic SSN@F-LTA coating can be consistently prepared through post modification of SSN@LTA coating with POTS, and also shows a high oil/water separation performance, with oil/water separation efficiency above 99.0 % and oil flux over 40,000 L m −2 h -1 , confirming the universality of the preparation strategy.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Guanzhong Zhai,Junwei Wu,Zhuorui Yuan,Hongmei Li,Daohua Sun
A major challenge in oil/water separation is the processing of surfactant-stabilized emulsions from the water medium. One of the feasible schemes of emulsion separation is the porous melamine sponge coupled with functional particles. Here, we proposed a novel superhydrophobic metal–organic framework (MOF)-based sponge for water-in-oil emulsion separation. The porous melamine sponge was combined with poly(dimethylsiloxane) (PDMS)-coated hydrophobic SiO2 and UiO66-OSiR particles were prepared for demulsification via the one-step dipping method for the first time. The PDMS@SiO2@UiO66-OSiR sponge revealed excellent superhydrophobicity at a water contact angle of 160.7° and superlipophilicity at an oil contact angle of 0°. Compared with the pristine melamine sponge, the size-controllable PDMS@SiO2@UiO66-OSiR sponge could separate stabilized water-in-oil emulsions with ultrahigh separation efficiency (>98.64%) and high flux (e.g., 970 L·m–2·h–1). Meanwhile, the PDMS@SiO2@UiO66-OSiR sponge exhibited superior durability and mechanical reusability. Under harsh conditions such as strong acid and alkali, organic solvent corrosion, etc., all water contact angles of the PDMS@SiO2@UiO66-OSiR sponge were over 152°. Furthermore, the stress decreased by 5% when the sponge was subjected to 10 loading/unloading compression cycles at a constant strain of 60%. These results demonstrate that the PDMS@SiO2@UiO66-OSiR sponge can efficiently separate water-in-oil emulsions through its adjustable porous structure coupled with demulsification and hydrophobic particles. This study provides a step forward in developing a feasible strategy for the MOF-based sponge for emulsion separation.
研究领域:
材料科学
·
环境工程
✓ 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）