INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Yumeng Zhao,Guoshu Gao,Peng Zhu,Haiou Liu,Yu Guo,Xiongfu Zhang
Purification and dehydration of ethyl acetate are important processes in chemical production, and the preparation of stable and efficient pervaporation membrane materials has still been a challenge. In this work, a well-intergrown polycrystalline Al-Fum@CS tubular membrane was successfully prepared by a synergistic strategy involving seeded growth combined with surface remediation and applied for the first time in the separation of a multicomponent mixture containing ethyl acetate by pervaporation. By regulating the synthesis conditions, a continuous Al-Fum membrane with thickness of 1.7 μm was initially grown within the innermost part of a uniform seed layer. Subsequently, a chitosan (CS) layer was introduced onto the membrane to fabricate the Al-Fum@CS membrane. This CS layer significantly modifies the defects existing in the membrane surface. The obtained Al-Fum@CS membrane with the thickness of around 1.8 μm is dense and has strong hydrophilicity. It can preferentially separate water from a ternary azeotropic mixture of water–ethanol–ethyl acetate and displays high pervaporation performance with a permeation flux of 1.88 kg/(m2·h) and a separation factor of ∼6000 at 60 °C. Especially, the Al-Fum@CS membrane can be continuously operated for more than 150 h without any obvious change in separation performance, showing excellent ultrahigh stability. Moreover, the as-prepared membrane has good acid resistance and reusability in complex environments according to the results of multiple mixture pervaporation experiments. Therefore, the Al-Fum@CS tubular membrane has great industrial application potential for the purification of ethyl acetate produced from the esterification reaction.
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
Insects
·
2024
·Vol. 15
·期 4
·231
·
IF 2.7
Chengzhe Li,Hua Wang,Fangyuan Bian,Jun Yao,Lei Shi,Xiaoming Chen
Simple SummaryButterfly larvae and adults can sense food odours from their surroundings, and exposure to these odours could alter larval or adult feeding preferences. However, it is still unknown whether butterfly pupae can sense odours from their surroundings. And little is known about how flower scents, in combination with food, affect butterfly adults’ subsequent foraging behaviour.Tirumala limniace(Lepidoptera: Danaidae) is a flower-visiting and highly charismatic butterfly. In this study,T. limniacepupae were exposed to the odour α-pinene and adults were exposed to the odours α-pinene and ethyl acetate to examine the effect of the experience on the foraging behaviour ofT. limniace. The results showed that exposure ofT. limniacepupae to α-pinene affected the feeding preference of newly emerged adults.T. limniaceexhibits olfactory learning in the adult stage, and adult odour preferences are correlated with the frequency of their training, though an increased training time does not necessarily imply an enhanced learning ability. Unlike some studies in other systems, we found thatT. limniacemales learned odours faster than females. This may be due to differences in antennal sensilla, affecting sensitivity to odours and nectar demand between males and females. Our study can help elucidate the important role of learning behaviour in butterfly adaptive responses to the environment and lay the foundation for further research on butterfly learning and memory.AbstractButterflies have the ability to learn to associate olfactory information with abundant food sources during foraging. How the co-occurrence of both food and food odours affects the learning behaviour of adults and whether butterflies perceive the odour of their surroundings and develop a preference for that odour during the pupal stage have rarely been tested. We examined the effect of experience with food odour components (α-pinene and ethyl acetate) during the pupal and adult stages on the foraging behaviour of the flower-visiting butterflyTirumala limniace. We found that α-pinene exposure during the pupal stage changed the foraging preference of newly emerged adults.T. limniaceexhibits olfactory learning in the adult stage, and adult learning may influence their previous pupal memory. Moreover, adults’ odour preference did not continue to increase over multiple training times. The learning ability of adults for floral odours (α-pinene) was greater than that for non-floral odours (ethyl acetate). In contrast to previous studies, we found that males learned odours more efficiently than females did. This could be attributed to differences in antennal sensilla, affecting sensitivity to compounds and nectar demand between males and females. Our study provides further insight into how olfactory learning helps flower-visiting butterflies use food odours to forage better.
研究领域:
动物行为学
·
生态学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2021
·
IF 6.165
Kun Yue,Guowei Zhou
Isobaric vapor–liquid equilibrium data for the ternary system of ethyl acetate + ethanol + ionic liquids (ILs) were obtained at 101.3 kPa. The ILs used were 1,3-dimethylimidazolium dimethylphosphate ([MMIM][DMP]) and 1-octyl-3-methylimidazolium hexafluorophosphate ([OMIM][PF 6 ]). The vapor–liquid equilibrium data were correlated using the nonrandom two-liquid model, and the results were well fitted with the experimental data, showing that the minimum concentration (mole fraction) of [MMIM][DMP] and [OMIM][PF 6 ] to break the azeotrope of ethyl acetate + ethanol system was 0.048 and 0.141, respectively. [MMIM][DMP] brought about a monotonous “salting-out” effect on ethyl acetate, while [OMIM][PF 6 ] brought about a crossover effect containing “salting-in” and “salting-out” on ethyl acetate. Finally, polarity of solvents and ions dissociated by ILs was analyzed through the σ-profiles, indicating the mechanism of various separation results using these two ILs. It is suggested that [MMIM][DMP] and [OMIM][PF 6 ] can be used as good candidate entrainers in separating ethyl acetate and ethanol.
研究领域:
化学工程
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物理化学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2024
·
IF 2
Kun Yue,Jiani Lu,Peiyu Chen,Shaonan Gu,Guowei Zhou
Isobaric vapor–liquid equilibrium (VLE) data for the ternary system of ethyl acetate + acetonitrile + acetate-based ionic liquids (ILs) were obtained with a modified Othmer still at 101.3 kPa, and the used ILs were 1-butyl-3-methylimidazolium acetate ([BMIM][Ac]) and 1-ethyl-3-methylimidazolium acetate ([EMIM][Ac]). The VLE data were correlated with the nonrandom two-liquid model and fitted well, indicating that the minimum mole fractions of [BMIM][Ac] and [EMIM][Ac] to eliminate azeotrope were 0.028 and 0.067, respectively. Both [BMIM][Ac] and [EMIM][Ac] led to a salting-out effect on ethyl acetate, and a higher concentration of ILs signified a stronger salt effect. In addition, interactions between ILs and solvents were estimated, and the polarity was analyzed with the σ-profiles, revealing the effect of ILs and the separation mechanism of the ternary system. The results indicated that both [BMIM][Ac] and [EMIM][Ac] could be qualified as solvents to separate ethyl acetate and acetonitrile. Based on the experimental data measured on the equilibrium scale and the separation mechanism calculated at the molecular scale, this work provides a useful strategy for studying the application of IL in extractive distillation in the future.
研究领域:
化学工程
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
FLUID PHASE EQUILIBRIA
·
2023
·
IF 2.6
Hengde Li,Hongna Qin,Shan Jiang,Bao Wang,Jianjiang Zeng,Kaiming Chen,Hao Tang,Yanxiong Fang
To separate and purify ethyl acetate (EA) from water, the ternary (water + ethyl acetate + 1,8-cineole) liquid–liquid equilibria at T = (283.15, 298.15 and 313.15) K under atmospheric pressure were studied. The extraction capacity of 1,8-cineole as an extractant in the separation of EA from aqueous solution was researched. The influence of temperature on the LLE was examined. High distribution ratio and selectivity coefficient obtained reveal the extraction ability and potential of 1,8-cineole as a green solvent . Additionally, the experimental LLE data were satisfactorily correlated by the NRTL and UNIQUAC models, and the binary interaction parameters were validated using a graphical user interface (GUI) by MATLAB.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2021
·
IF 3.178
Hongyue Guo,Yicong Zhao,Yufan Pang,Jun Li,Qingsong Li
In order to separate and purify cyclohexanone from water, in 101.3 kPa, the liquid-liquid equilibrium (LLE) data of water (1) + cyclohexanone (2) + ethyl acetate (3) at 298.2, 303.2, and 313.2 K were measured. The extraction ability of ethyl acetate was evaluated by distribution coefficient (D) and selectivity factor (S). It was found that the extraction effect was higher at 313.2 K, and the selectivity was better at 298.2 K. At the same time, through comparison with the literature, it is found that mesityl oxide can selectively extract cyclohexanone from water better than ethyl acetate. The NRTL and UNIQUAC models were successfully associated with the LLE data with the root mean square deviation (RMSD) was not greater than 0.27%. Finally, it was verified that the regression parameters of the thermodynamic model have good consistency by GUI-MATLAB tools.
研究领域:
化学工程
·
热力学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2024
·
IF 3.5
Yu Fengqin,Xie Qiang,Zhang Zhijun,Yang Shuai,Liu Jinchang,Ren Qiang,Liang Dingcheng
Zeolites are widely used for removing volatile organic compounds (VOCs) in industrial processes. However, the understanding of the competitive adsorption behavior of multicomponent VOCs on zeolites remains insufficient. This study employed grand canonical Monte Carlo simulation to investigate the adsorption behaviors of nonpolar benzene and polar ethyl acetate in both pure and mixed forms on FAU, LTA and MFI zeolites. The effects of zeolite topology, Si/Al ratio, and compensating cations on competitive adsorption were explored. The results revealed that the adsorption capacities of benzene and ethyl acetate on FAU and LTA zeolites gradually increased with increasing Si/Al ratio, consistent with the increasing trends in their specific surface areas and pore volumes. However, the MFI zeolite shows no significant change in these properties with varying Si/Al ratios. Zeolites modified with Ca 2+ significantly improved the benzene and ethyl acetate adsorption capacities, while impact on ethyl acetate adsorption is minimal. Zeolites modified with K + reduced the adsorption capacities for both benzene and ethyl acetate. For binary mixtures, Na-FAU-1, Na-LTA-1, and Na-MFI-15 exhibited high selectivity for ethyl acetate. Increasing the Si/Al ratio and K + -modification reduced the adsorption selectivity of these zeolites for ethyl acetate. Ca 2+ -modification reduces the selectivity of LTA-1 toward ethyl acetate, with minimal impact on FAU-1 and MFI-15. Dynamic adsorption experiments with commercial zeolites confirm the reliability of the simulation results in predicting benzene and ethyl acetate adsorption performance. This study is expected to provide guidance for selecting appropriate zeolites for VOCs mixtures in practical applications. Graphical abstract
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Sensor Review
·
2025
·
IF 1.4
Zhaopeng Li,Pei Li,Peisi Yin,Xin Zhao,Yangting Hu,Fei Sun,Xia Sun,Zhenhe Wang
Purpose This paper aims to develop a highly sensitive resistive gas sensor for accurately detecting ethyl formate to achieve reliable and real-time monitoring of fish meal spoilage. Design/methodology/approach Based on the one-step solvothermal reduction method, in a specific triethylene glycol solution environment and high temperature, the 3D ZnO sensing material with a jackfruit-like structure was prepared for detecting ethyl formate gas in fish meal. Findings The gas sensor based on 3D ZnO displays high sensor response (69.68–100 ppm) at 280°C and 43% RH and good sensor response (12.18–100 ppm) at 280°C and 80% RH, ultra-low detection limit of 10 ppb at 43% RH, excellent selectivity, repeatability and long-term stability. The sensing mechanism is due to the gain or loss of electrons caused by the sensor surface reaction. The unique jackfruit-like structure, abundant oxygen vacancies and large surface area may be another factor contributing to its excellent ethyl formate gas sensing performance. Originality/value The authors first developed an ethyl formate gas sensor, and the results were compared with the previously published data. The analysis showed the ZnO gas sensor demonstrated excellent sensing performance. This work highlights the potential of high response ethyl formate gas sensors to accurately evaluate fish meal quality.
研究领域:
材料科学
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食品科学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2021
·
IF 3.171
Yu Xie,Guoming Huang,Weiguo Hu,Yujun Wang
Piperacillin is a polar organic substance, and can reduce the interfacial tension of oil and water when dissolved in water. In this study, changes in dichloromethane–water interfacial tensions and microdroplet sizes during piperacillin synthesis from an aqueous solution of ampicillin and dichloromethane solution of 4-ethyl-2,3-dioxo-1-piperazine carbonyl chloride (EDPC) were observed using a pendent drop technique and a coaxial ring tube system with embedded high-speed camera, respectively. It was found that the rapid N -acylation reaction caused the piperacillin at the interface to synthesize rapidly and diffuse out slowly, resulting in the interfacial tension decreased from 19.5 mN·m −1 to 7.2 mN·m −1 rapidly and then increased slowly as the concentrations of ampicillin and EDPC were 0.05 mol·L −1 and 0.1 mol·L −1 . Meanwhile, the increase in the concentration of EDPC increased the peak concentration of piperacillin at the interface, and the addition of ethyl acetate to the ampicillin solution promoted mass transfer and reduced the aggregation of piperacillin effectively. During synthesis, the interfacial tension decreased, leading to a change in droplet sizes in the micro-reaction system. The two-phase reaction was carried out in a coaxial ring tube, with ampicillin and EDPC solutions as continuous and dispersed phases, respectively. The reaction reduced the dripping flow area, and the addition of ethyl acetate to the ampicillin solution slightly affected the division of the flow pattern. Under the same flow conditions, the droplet sizes of the reaction group were smaller than those of the no reaction group. The experimental results demonstrated that the increase of the continuous phase, decrease in the dispersed phase flow rate, or increase in EDPC concentration making droplet sizes smaller, and the addition of ethyl acetate slightly affected droplet sizes. These findings are important for the design and optimization of piperacillin synthesis reactors.
研究领域:
化学工程
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制药工程
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 6
·48345
·
IF 2.188
Libo Wang,Yuchang Su,Jing Zhang,Hongzhi Zhang,Qiaoqiao Dong
PVDF-CoFe 2 O 4 (CFO) thick membranes were synthesized by solvent casting method. The mixed organic solvents consist of N-methyl-2-pyrrolidone (NMP) and Ethyl acetate (EA), in which the mass ratios of NMP and EA (NMP:EA = 1:0, 1:1, and 1:2) and the temperature of solvent evaporation (range from 50 to 80 °C) has been considered. The phase structure, β-PVDF phase content, and electrical and magnetic properties of these membranes were investigated to reveal the effect of EA addition and temperature on these properties. Results manifest that all samples showed coexistence of ferroelectric and ferromagnetic properties at room temperature. EA addition makes film more compact, which may be responsible for the differences in ferromagnetic properties. Adding EA and enhancing temperature resulted in phase transition of PVDF from α and γ to β, which contributed to membranes’ ferroelectric performances. In all samples, NMP:EA = 1:2 treated at 80 °C exhibits the maximum β-phase fraction and polarization (Pmax) of 87.2% and 2.398 μC cm −2 , respectively. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48345.
研究领域:
材料科学
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物理学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICS AND CHEMISTRY OF LIQUIDS
·
2013
·
IF 0.813
Jinshou Wang,Boan Shi,Zhen Shi,Yu Cao,Yingxuan Liu,Shenghui Zhang
We have measured the rate of saponification of ethyl acetate (CH3COOC2H5) in 2,6-lutidine (2,6-DMP) + water (H2O) near and far away from its critical point by electrical conductivity experiment. We found that the rate of saponification slowed in the one-phase region at temperatures near the critical point. This behaviour is evidence in support of critical slowing down. Moreover, the experimental results were compared with those of the same reaction in a different critical mixture of 2-butoxyethanol + H2O [Y.W. Kim, Int. J. Thermophys. 25, 1025 (2004)].
研究领域:
化学动力学
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS COMMUNICATIONS
·
2023
·
IF 3.7
Lirong Lv,Zhongguo Zhang,Sheng Wang,Yue Shan,Liangliang Wang,Tongzhou Xu,Peiran He
A series of Y Ce catalysts were prepared using Y-loaded (Y = Cu, Co, Mn) Ce-based metal–organic framework as a precursor. Mn-loaded CeO 2 exhibited significantly better catalytic activity in the catalytic oxidation of ethyl acetate (EA) than noble metal catalyst. The relationship between the physicochemical properties of Y Ce catalysts and catalytic activity was studied by different characterization methods. The enhanced catalytic activity was attributed to the strong interaction between the transition metals and Ce, high specific surface area, abundant lattice defects, more oxygen vacacies and higher O latt /(O latt + O ads + O w ) molar ratios. The main intermediates in the oxidation of EA were ethanol, acetic acid, acetone, acetaldehyde and diethyl ether.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）