CHEMICAL ENGINEERING SCIENCE
·
2023
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IF 4.7
Qiang Sun,Jia Xiong,Hongxia Gao,Wilfred Olson,Zhiwu Liang
Catalytic CO 2 desorption from rich amine solution is a practical approach to reducing energy consumption for amine regeneration. In this study, for the first time, the catalytic effect of environmentally friendly, imidazole series ionic liquids ([Bmim]PF 6 , [Bmim]BF 4 , [Bmim]HSO 4 , [Bmim]NO 3 , [Bmim]CH 3 COOH, [Bmim]Cl, [Bmim]Br, and [Bmim]I) is evaluated in terms of CO 2 desorption rate, amount of CO 2 released, and heat duty. Overall, the [Bmim]PF 6 catalyst shows excellent catalytic activity for CO 2 desorption, increasing the quantity of CO 2 released by 21.35% and reducing the relative heat duty by 17.59%. In addition, the catalytic applicability of [Bmim]PF 6 for secondary and tertiary amine systems was evaluated. Of note, the homogeneous [Bmim]PF 6 catalyst presents good stability during 5 cycles. The catalyst/MEA (monoethanolamine) solution ratio of 3 wt% retained about 94% of the catalytic performance after five cycling tests without any reactivation step, showing the potential application of this desorption technology for CO 2 capture with lower heat duty.
研究领域:
化学工程
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环境科学
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催化
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碳捕集与封存
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Li Zhang,Yu Han,Ming Sun,Shaobin Li
In this study, we developed an electrochemical sensor utilizing a composite material consisting of zirconium‑copper bimetallic metal-organic framework functionalized with ionic liquid [BMIM][PF 6 ]. This composite material was fabricated by simple wet impregnation method, which not only maintains excellent electrocatalytic activity but also enhances electron transfer rate and electroactive surface area . The ZrCu-MOF-818/ILs composite modified electrode has been demonstrated as an effective tool for the detection of nitrite. The electrode exhibited a remarkable limit of detection (LOD) of 0.148 μM and wide linear ranges of 6–3000 μM and 3000–5030 μM. It is worth noting that the sensor displayed excellent reproducibility and repeatability, with relative standard deviation (RSD) values of 1.06% and 1.37%, respectively. Furthermore, the proposed method was successfully applied for the detection of nitrite in tap water and pickle juice.
研究领域:
分析化学
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食品科学
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产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·Vol. 49
·期 9
·3526-3535
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IF 2.5
Shuang Meng,Yan Zhuang,Xue Yang,Dongxuan Guo,Jinlong Li
Volatile organic compounds (VOCs) emitted from industrial activities and transportation pose significant health risks to humans and contribute to environmental issues. As a result, there has been growing interest in developing effective technologies for VOC removal. This study investigates the removal of low-concentration VOCs from air using a membrane catalytic process that combines a supported ionic liquid membrane (SILM) with a novel visible light-driven photocatalyst. The system, consisting of a 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM]PF6) SILM and N-doped La–TiO2 photocatalysts, achieves a mineralization rate of 40%–60% and a removal efficiency of approximately 75% for VOCs under visible light exposure for 10 hours. The synergistic effects of membrane separation and photocatalytic degradation significantly enhance the overall VOC removal efficiency compared to using either method alone. The membrane catalytic system demonstrates particular applicability and stability for various organic compounds, including toluene, acetone, chloroform, benzene, and xylene. Overall, this work presents a promising approach for the removal and mineralization of VOCs.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
ANALYTICAL SCIENCES
·
2025
·
IF 2
Wang Mengge,Chen Xiaofeng,Wang Zhigang,Li Ming
Ionic liquids (ILs) which belong to the molten salt of a high ionic environment exhibit a number of unique properties, including the formation of various heterogeneities in their microemulsion. We found that auto-generated radicals within a [Bmim][PF 6 ]/[C 16 mim][PF 6 ]/PBS reverse micelles (IL-RMs) and then the radicals were quantified in this study. For the radical confirmation, EPR spectroscopy with 5,5-dimethyl-1-pyrroline N-oxide (DMPO) free radical scavenger was carried out. A spectroscopic chemical probe of 1,1-diphenyl-2-picrylhydrazine (DPPHH) was employed to quantify the radicals in the IL-RM systems. The mechanism of the radical generation was also proposed. The DPPHH probe method is simple, rapid, and sensitive to quantify free radicals in the IL-RM systems. Finally, IL-RMs were successfully applied to degrade Rhodamine B (Rho-B) dye with low degradation cost, simple operation, short time consumption, and remarkable degradation effect. The results show a near 100% degradation rate for 10 μmol·L −1 Rho-B in the IL-RMs system with pH 7.4 PBS containing 1 mmol·L −1 chloroacetic acid as an aqueous phase. Graphical abstract
研究领域:
化学
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环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2016
·
IF 4.917
Yu-Cai He,Zhi-Cheng Tao,Jun-Hua Di,Liang Chen,Lin-Bing Zhang,Dan-Ping Zhang,Gang-Gang Chong,Feng Liu,Yun Ding,Chun-Xia Jiang,Cui-Luan Ma
It was the first report that the concentrated hydrolyzates from the enzymatic hydrolysis of dilute NaOH (3 wt%)-soaking rice straw at 30 °C was used to form [Bmim]PF 6 -hydrolyzate (50:50, v/v) media for bioconverting ethyl 4-chloro-3-oxobutanoate (COBE) into ethyl ( R )-4-chloro-3-hydroxybutanoate [( R )-CHBE] (>99% e.e. ) with recombinant E. coli CCZU-A13. Compared with pure glucose, the hydrolyzates could promote both initial reaction rate and the intracellular NADH content. Furthermore, emulsifier OP-10 (20 mM) was employed to improve the reductase activity. Moreover, Hp-β-cyclodextrin (0.01 mol Hp-β-cyclodextrin/mol COBE) was also added into this bioreaction system for enhancing the biosynthesis of ( R )-CHBE from COBE by E. coli CCZU-A13 whole-cells. The yield of ( R )-CHBE (>99% e.e. ) from 800 mM COBE was obtained at 100% in the [Bmim]PF 6 -hydrolyzate (50:50, v/v) media by supplementation of OP-10 (20 mM) and Hp-β-CD (8 mM). In conclusion, an effective strategy for the biosynthesis of ( R )-CHBE was successfully demonstrated.
研究领域:
生物化学
·
微生物学
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DOI
高影响因子
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