SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Miao Chang,Jiahao Ren,Yan Wei,Jie-Xin Wang,Qingyuan Yang,Dahuan Liu,Jian-Feng Chen
It is an extremely challenging task to capture C 3 H 8 from the C 3 H 8 /C 3 H 6 mixture, which requires an adsorbent with a specific pore structure. Herein, an ultramicroporous pillared metal–organic framework Ni(ADC)(TED) 0.5 is reported for efficient C 3 H 8 /C 3 H 6 separation. Theoretical calculations revealed that the ADC ligand may form a splint-like pore confinement structure induced by the introduction of guest molecules to construct a propane-trap in the framework. As a result, excellent separation performance for C 3 H 8 /C 3 H 6 is obtained. A record-high IAST-predicted selectivity (6.4), C 3 H 8 /C 3 H 6 uptake ratio (111.0%), C 3 H 8 Henry constant (2159.2 mmol g −1 bar −1 ), and separation potential (1943.0 mmol L -1 ) exceed those in porous adsorbents reported so far. Breakthrough experiments indicate that Ni(ADC)(TED) 0.5 can completely separate C 3 H 8 /C 3 H 6 mixture with the highest C 3 H 6 productivity (0.085 mmol g −1 ) and good regenerability. These results show that this material has great potential application in C 3 H 8 /C 3 H 6 separation.
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 APPLIED POLYMER SCIENCE
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2019
·Vol. 136
·期 45
·48179
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IF 2.188
Miao Wang,Yuan-Wei Huang,Yan Chen,Xi Yan,Wen-Yan Xu,Wan-Zhong Lang
Poly(vinylidene fluoride) (PVDF) membranes without any additives were fabricated by a vapor-induced phase separation method and applied to the adsorption separation of vitamin B12 (VB12) from aqueous solution. The effects of preparation conditions including PVDF concentration in dope, vapor humidity, and exposure time on the morphologies, mechanical strength, adsorption, and permeation performances are investigated in detail. The results indicate that the PVDF membranes have a uniform spongy structure without macrovoids. The lower polymer concentration, relatively higher humidity, and longer exposure time easily leads to the formation of larger polymer nodules in the membrane matrix and lower mechanical strength of membranes. The resulted PVDF membranes exhibit superior separation efficiency for both static and dynamic adsorption for VB12. In the ultrafiltration (adsorption)-regeneration cycles, the permeation flux remains above 2500 L m −2 h −1 bar −1 and the VB12 removal ratio is above 92% after six cycles. The prepared PVDF membranes show superior adsorption capacities to other traditional adsorbents (such as activated carbons, nanoclay, etc.) for VB12 removal. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48179.
研究领域:
材料科学
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环境工程
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生物技术
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2018
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IF 3.927
Houxiao Wu,Yongwei Chen,Daofei Lv,Renfeng Shi,Yang Chen,Zhong Li,Qibin Xia
The purification of ethylene (C 2 H 4 ) from the cracking gas ethane/ethylene mixture (1:15, v / v ) is a typical energy-intensive process in the chemical industry. As an alternative, adsorptive separation with much lower energy consumption and operational cost has attracted escalating attention. In this work, we reported an interesting C 2 H 6 -trapping adsorbent, In-soc-MOF-1, an indium-based metal-organic framework exhibiting the preferential adsorption of C 2 H 6 over C 2 H 4 . Single-component adsorption isotherms showed that the C 2 H 6 adsorption capacities were higher than those of C 2 H 4 under measured temperatures (288, 298 and 308 K). For example, the uptakes of C 2 H 6 and C 2 H 4 were 4.04 and 3.72 mmol/g at 298 K and 100 kPa, respectively. The calculated IAST selectivity of C 2 H 6 /C 2 H 4 (1:15) on In-soc-MOF-1 was in the range of 1.4–4.8. Moreover, the dynamic separation performance of In-soc-MOF-1 toward the C 2 H 6 /C 2 H 4 binary mixture was evaluated by the breakthrough experiments, the result of which suggests that In-soc-MOF-1 could achieve efficient separation by trapping the impurity C 2 H 6 molecules out of the C 2 H 6 /C 2 H 4 binary mixture. Notably, In-soc-MOF-1 not only showed good water and moisture stability but also exhibited excellent recyclability, where negligible decrease in C 2 H 6 adsorption capacity was observed during five cycles of adsorption-desorption tests. These properties suggest that In-soc-MOF-1, as a C 2 H 6 -trapping adsorbent, could be considered as a potential candidate in the practical application of separating the cracking gas mixture.
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
CHEMICAL PHYSICS LETTERS
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2021
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IF 2.328
Hao Liu,Yayun Zhao,Chen Zhou,Bin Mu,Liang Chen
A reliable strategy of Zr-based metal–organic framework (Zr-fum-fcu-MOF) was successfully achieved by microwave-assisted synthesis. Well-shaped and octahedral Zr-fum-fcu-MOF particles were obtained at 100 °C for 1.0 h with 150 equivalents of FA per ZrOCl 2 ·8H 2 O. A clear difference for the adsorption behavior of iso -C 4 H 10 (1.11 mmol/g) and n-C 4 H 10 (3.56 mmol/g) was observed at 25 °C and 1.0 bar. Moreover, 3.16 mmol/g CO 2 uptake was also obtained at 0 °C and 1.0 bar while the adsorption capacity of CH 4 and N 2 is 0.85 mmol/g and 0.21 mmol/g, respectively. This indicates that Zr-fum-fcu-MOF is a promising candidate for CO 2 capture.
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 Cleaner Production
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2023
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IF 11.1
Fan Luo,Min Li,Xianghui Liang,Jingxian Yang,Shuangfeng Wang,Xuenong Gao,Zhengguo Zhang,Yutang Fang
Adsorption separation and photocatalytic techniques have emerged as effective methods to eliminate organic dyes from water environment, but the poor recycling of most powdered adsorbents and photocatalysts in aqueous solutions hinders their commercial viability. Herein, we propose an effective and reusable dye-elimination module through the bottom-up self-assembly of photocatalyst (TiO 2 nanoparticles) and adsorbent (Al-fumarate) on a corrugated paper (CP) support. Results show that the hydrophilic and electrostatic interactions between the components ensure the integrity of the whole module in aqueous phase dyes, thereby ensuring its practicality and cyclic stability (10 times). Al-fumarate with a superior specific surface area of (1117.82 m 2 /g) and porosity (0.47 cm 3 /g) on the substrate serves to induce and capture the dye molecules, while TiO2 nanoparticles with a wide bandgap trigger a redox reaction to further degrade the organic pollutants . Through the synergistic effect between adsorption and photocatalytic strategies, the resultant functional CP-based composite exhibits superior dye-removal performance than other potential composite materials, reaching 98.93% degradation efficiency of congo red (CR) solution (25 mg/L), and 97.91% elimination capacity of methylene blue (MB) solution (20 mg/L). Therefore, the designed dye-elimination module can serve as a convenient, recyclable, and efficient cleaning module in practical wastewater treatment fields.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2021
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IF 2.495
Dan Liang,Yunfeng Hu,Qiang Bao,Jian Zhang,Jiawei Feng,Penglai Sun,Yutong Ma,Hongsheng Zhang
Rho zeolite was successfully synthesized by hydrothermal synthesis adopting 18-crown-6 as template, and the cations (H + , Na + , K + , Cs + , Cd 2+ and Pb 2+ ) of different radii were introduced into the framework of Rho by ion exchange. The samples were characterized by XRD, SEM-EDX, ICP and N 2 -BET. The adsorption behavior of CO 2 and CH 4 on cation-exchanged Rho was measured, and the adsorption isotherm was fitted by Langmuir equation to study the adsorption performance of these zeolites. The adsorption results show that the pore size of Rho is not solely dependent on the cation radius, the different positions of the cations are also more crucial in pore size adjustment. In all researched Rho, the introduction of Cd 2+ and Pb 2+ can more significantly reduce the pore size, and completely restrict the entry of CH 4 , thereby further improving the CO 2 /CH 4 selectivity. Therein, Cd-Rho has the best adsorption performance, with considerable CO 2 adsorption capacity, and extremely high CO 2 /CH 4 selectivity and CO 2 working capacity, which provides a new clue for the development of adsorbents for CO 2 and CH 4 separation in PSA process.
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2014
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IF 3.065
Lidan Lv,Jie Zhang,Chongpin Huang,Zhigang Lei,Biaohua Chen
The removal of dimethyl disulfide from model liquefied petroleum gas using metal salt impregnated zeolite as the adsorbent was studied in a fixed-bed adsorption equipment. Effects of different carrier, metal iron species and content of active component, mass space velocity, temperature, as well as adsorption selectivity and regeneration performance were all investigated by performing the breakthrough experiment. Among all these adsorbents, 5 wt.%Ag 2 O/NaY showed the highest breakthrough sulfur capacity. The adsorption selectivity of Ag 2 O/NaY was studied by the infrared spectra. It was found that the direct S–Ag(I) interaction was the essential reason for the evidently improved adsorption ability and selectivity of Ag 2 O/NaY for removing disulfide from solutions containing olefin . Regeneration study indicated that the saturated adsorbent was regenerated under the temperature of 550 °C for 8 h in the air atmosphere. After five times regeneration, the adsorbent Ag 2 O/NaY still shows high breakthrough sulfur capacity.
研究领域:
化学工程
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环境科学
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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
Gankai Huang,Xinyi Huang,Junlin Huang,Xuye Hou,Youquan Zhang,Fang Lai,Ronghui Lin,Kangquan He,Qunhua Long,Hongbing Ji,Kungang Chai
Efficient purification of xylene isomers, particularly the separation of para- / meta -xylenes (PX/MX), is industrially crucial but challenging. Here, we report a classical aluminum-based metal–organic framework (MIL-160) that exhibits an exceptional meta-selectivity in liquid-phase competitive adsorption of xylene isomers. The outstanding separation performance of MIL-160 for xylene isomers is confirmed by dynamic breakthrough experiments. The PX eluted first and breakthrough of MX didn’t occur until a long retention times, which is in accordance with the results observed from static adsorption experiment. Molecular simulations and calculations suggested that the largest affinity of MIL-160 toward MX, potentially due to the good fitness between the 1D square-shaped channel and MX. To improve the productivity of purified PX in continuous separation mode, we speculated that combining the MX-selective property of MIL-160 and the previously reported ortho -xylene (OX)-selective property of CAU-23 can enhance the separation effect between PX and the other two isomers. So, MIL-160 and CAU-23 were filled simultaneously in column and the effect of mass ratio of them on PX productivity was investigated. The results indicated that when the mass ratio of MIL-160 versus CAU-23 was 4:6, MX and OX almost simultaneously eluted and reached saturation, which can maximize the productivity of PX. This study offers a feasible strategy for isolating PX from xylene isomer with low energy consumption and high efficiency.
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
AICHE JOURNAL
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2024
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IF 3.5
Tong Li,Lu Zhang,Yong Wang,Xiaoxia Jia,Hui Chen,Yongjian Li,Qi Shi,Lin-Bing Sun,Jinping Li,Banglin Chen,Libo Li
Purifying ultra-high purity propylene (>99.995%) with an energy-efficient adsorptive separation method is a promising yet challenging technology that remains unfulfilled. Instead of solely considering the effect of adsorbents on guest molecules, we propose a synergistic adsorption mechanism for the deep removal of propane and propyne, utilizing supramolecular interactions in both “host-guest” and “guest-guest” systems. Through modulation of the pore environment, Ni-DMOF-DM exhibits exceptionally high adsorption capacities for propane and propyne (171 and 197 cm 3 /g at ambient temperature and pressure, respectively), and unprecedented propane/propylene separation selectivity (2.74). Theoretical calculations confirm the geometric interactions of C-H···π bonds and C-H···O hydrogen bonds resulting from host-guest interactions, alongside C-H···H guest-guest interactions within the confined pore space. Breakthrough experiments demonstrated that ultra-high purity propylene (propane < 0.005% and propyne < 1.0 ppm) can be directly collected from ternary mixtures on Ni-DMOF-DM, achieving a productivity of up to 152.14 L/kg.
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
RSC Advances
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2014
·Vol. 4
·期 35
·18222-18228
·
IF 3.708
Yun Yu,Jianrui Wang,Jiansheng Lian,Xinjian Cheng
The simultaneous detection and separation of copper ions is important. In this study, a fluorescent chemosensor (a copper sensitive molecule), was prepared using 6-bromo-benzo[de]isochromene-1,3-dione as a precursor. The as-prepared fluorescent molecule contains a hydroxyl group and an aminoquinoline moiety. The hydroxyl group enables the fluorescent molecule to anchor to a porous polyurethane (PU) sponge. The chemosensors still retained their recognition ability after they were introduced to PU. Upon the addition of Cu2+ ions to the PU sponge, both the color and the fluorescence intensity changed, suggesting that the chemosensor-functionalized PU sponges could be used as a Cu2+ ion sensor. The copper ions could also accumulate and be enriched on the sponges. The adsorption capacity of the PU sponge (containing 2 wt% of the chemosensor) reached 97.26 mg g−1, which was higher than that of the solid PU membranes (52.62 mg g−1). These polymeric, highly sensitive chemosensors may potentially be applied in the detection of water pollution generated by sources such as electroplating and drain outflow.
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Feifei Zhang,Kunjie Li,Jian Chen,Xinran Zhang,Kebing Li,Hua Shang,Lei Ma,Wujie Guo,Xinlong Wu,Jiangfeng Yang,Jinping Li
Natural gas purification by economic and low-energy adsorptive separation processes is important. However, as a difficult global problem, N 2 removal from N 2 /CH 4 mixtures is challenging because of their similar physical properties. In this study, the separation of N 2 /CH 4 by Cr-metal–organic frameworks (MOFs) (MIL-100Cr, MIL-101Cr and TYUT-96Cr) with various open Cr site densities was studied. Gas sorption isotherms showed that TYUT-96Cr exhibited the highest N 2 /CH 4 uptake ratio (13.67 at 0.01 bar and 298 K) of the selected Cr-MOFs, which was consistent with the highest density of Cr (III) sites. This material provided the highest CH 4 productivity (0.716 mmol/cm 3 ) per cycle for N 2 removal from a 5:95 N 2 /CH 4 mixture to produce 99.99% pure CH 4 , as shown by the breakthrough experiments. Pressure-swing adsorption simulations indicated that, by a two-bed six-step method, pristine 95% methane was enriched to 98.9% by TYUT-96Cr. The largest CH 4 productivity, high breakthrough selectivity and thermal stability of TYUT-96Cr among the Cr-MOFs, made it a promising adsorbent in trace N 2 removal for practical industrial application.
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
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IF 4.939
Xintong Li,Xianglin Wang,Min Li,Junhong Luo,Yongtao An,Peilong Li,Jiangfeng Song,Changan Chen,Xingwen Feng,Shuai Wang
Deuterium has numerous applications in industry and scientific research. However, the conventional methods for separation hydrogen isotopes face the problems of low selectivity and high energy consumption. Recently, microporous material adsorption separation technology provides an efficient way for the separation of hydrogen isotopes. Herein, we prepared the metal bistriazolate framework Ni 2 Cl 2 BBTA, featuring a high density of coordinatively unsaturated Ni 2+ sites. Interactions between the open metal sites and hydrogen render this material excellent separation ability for the capture of D 2 from the hydrogen isotopes mixture, with the D 2 over H 2 selectivity up to 4.5 at 77 K and 4.0 at 87 K respectively. Notably, recycle experiments show that this material has great potential in the application of hydrogen isotope separation, owing to its good structural stability and reusability .
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
危险品化学品经营许可证（带存储）