JOURNAL OF SURFACTANTS AND DETERGENTS
·
2018
·Vol. 21
·期 5
·657-665
·
IF 1.454
Shishi Pang,Wanfen Pu,Chongyang Wang
Crude oil properties significantly affect foam behavior that is important to foam application in enhanced oil recovery. This study focused on the comparison on foam behavior in the presence of light oil and heavy oil. Foamability and foam stability, the bubble size, and the film thickness as well as the configuration of oil drops were fully investigated. Final results indicated that both the heavy oil and light oil increased the foamability of sodium dodecyl sulfate but decreased that of the amphoteric surfactant imidazoline. The positive effect of both light oil and heavy oil on foam stability was reconfirmed. However, heavy oil was more favorable to foam stability. The light oil may shorten the foam half-life but prolong the foam drainage half-life. The heavy oil was more effective in reducing the foam size and increasing the foam uniformity compared with light oil. According to the micrograph of foam, light oil was emulsified into quite small oil droplets, filling the plateau borders and lamellas. The heavy oil, in the form of far larger oil droplets, was mainly distributed in plateau borders only. The larger oil droplets resulted in the more stable foam, which was verified. Moreover, light oil (oil B) performed well in thickening the foam film, as did the heavy oil (oil A). But for the lightest oil (oil C), a thinning effect on the film was detected.
研究领域:
石油工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
·
2023
·Vol. 100
·期 9
·733-741
·
IF 2
Zhenyu Wu,Jinjin Cai,Zhonghui Liu,Xiaojiang Liang,Shangzhi Yu,Yong Nie
In many regions, even if waste vegetable oil is used as raw material, the profits of biodiesel (fatty acid methyl ester, FAME) enterprises still remain restricted, and they are facing environmental problems caused by the by-product glycerol. Hence, value-added utilization of FAME and glycerol is a promising alternative to improve the competitiveness of biodiesel enterprises in the economy and environmental protection. In this paper, FAME and glycerol were utilized to prepare epoxidized acyl glycerides by transesterification and epoxidation. In the transesterification, acyl glycerides were prepared by reacting FAME and glycerol catalyzed by K 2 CO 3 . The contents of monoacyl glyceride, diacyl glyceride, and triacyl glyceride in the acyl glycerides were about 50%, 40%, and 10%, and the optimal conditions were a temperature of 200°C and the molar ratio of FAME to glycerol of 1:1. In the epoxidation, selectivity of epoxides was significantly affected by monoacyl glyceride content, and a treatment method was developed to control the monoacyl glyceride content <5%. In addition, the plasticity of epoxidized acyl glycerides to partially substitute dioctyl phthalate in polyvinyl chloride was studied, the overall mechanical properties, thermal stability, and extraction resistance were improved. In this work, FAME and glycerol were utilized to prepare epoxidized acyl glycerides with higher value-added, which provide a potential solution for improving the market competitiveness of biodiesel enterprises.
研究领域:
化学工程
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环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
BIOMASS & BIOENERGY
·
2023
·
IF 6
Wen-jie Cong,Jian Yang,Jianguo Zhang,Zhen Fang,Zheng-diao Miao
Magnetic self-assembly metal-organic frameworks (MOFs) were constructed for the co-production of biodiesel and hydrogen from waste oils. The highly active MOF nanoparticles were synthesized and catalyzed crude glycerol with 126.8% hydrogen yield in subcritical water (350 °C, 5 min). By coupling alkali with MOF-derived carriers, continuous process of fast production of biodiesel (with microwave heating at 90 °C in 15 min, 15:1 methanol/oil molar ratio and 9 wt.% catalyst dosage) and hydrogen (350 °C, 5 min) were achieved with yield of 95.3% biodiesel from waste oil (AV of 3.95 mg KOH) and 102.6% H 2 from crude glycerol by-product, respectively. The nanoparticles were magnetically separated for 5 cycles with 95% biodiesel yield. Subsequently, the deactivated catalyst was used for hydrothermal gasification with 50% increasing in hydrogen yield. Characterization techniques showed active sites of MOF-derived nanoparticles were well dispersed with surface area increased by 3.9 times for highly efficient production of biodiesel and hydrogen. It revealed that MOF materials can be designed to make active catalysts and carriers for loading catalytic sites for biomass conversions to targeted biofuels.
研究领域:
能源与环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Essential Oil Bearing Plants
·
2024
·
IF 2.1
Minghui Tang,Yong Ai,Ni Song,Xian Xu,Lin Geng,Dongqiu Chen,Lu Ren,Xiaolu Chen,Jingyi Chen,Lanyue Zhang,Tinggang He
The antidepressant-like effects of five herbal essential oils (EOs), Jasminum sambac (Linn.) Aiton essential oil (JSEOs), Magnolia denudata Desr. essential oil (MDEOs), Rosa rugosa Thunb. essential oil (RREOs), Aloysia citriodora Ortega ex Pers. essential oil (ACEOs) and Abies balsamea (L.) Mill. essential oil (ABEOs) were evaluated. By virtue of a reserpine-induced depression mouse model, the antidepression activities and mechanisms of these EOs were explored. The results indicated that the inhalation of EOs significantly ameliorated depression-like behaviors in reserpine-induced depression mice, including a decrease in anxiety and immobility time. JSEOs and ABEOs significantly attenuated reserpine-induced depression-like behaviors, particularly the decreased body weight and immobility time, as determined by tail suspension and forced swimming tests. Furthermore, RT-qPCR and western blotting analyses indicated that the EOs influenced brain-derived neurotrophic factor (BDNF), serotonin1A (5-HT1A), and inflammatory cytokine levels. ACEOs attenuated reserpine-induced hippocampal and neuronal damage, significantly increased glucocorticoid receptor (GR) and 5-HT1A levels, and suppressed the inflammatory response. These results provide new insights into the antidepressant effects of herbal EOs and suggest that the five EOs evaluated in this study are potential nutraceuticals for the treatment of depression.
研究领域:
药理学
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神经科学
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2018
·
IF 5.651
Shangde Sun,Gaoshang Wang,Ping Wang
Monoricinolein (MRO) and diricinolein (DRO) were renewable and biodegradable lubricants . In this paper, MRO and DRO were prepared by the novel cleaner enzymatic glycerolysis of castor oil (CO) in solvent-free system. Three commercial immobilized lipases (Novozym 435, Lipozyme RM IM and Lipozyme TL IM) were screened and compared, and Novozym 435 showed the best catalysis performance among the tested lipases. Effects of reaction variables (reaction pressure, reaction time, temperature, enzyme load, substrate ratio and water content) on the enzymatic glycerolysis of CO were investigated. High conversion of CO (92.48 ± 1.02%) and the maximum bio lubricants yields (54.47 ± 0.58% MRO and 38.01 ± 0.50% DRO) were achieved under the following conditions: enzyme load 5% (w/w, based on the total mass), CO/glycerol ratio at 1:6, 90 °C, and 3 h. The activation energies (Ea) for CO conversion and the formation of MRO and DRO were calculated as 33.75 kJ/mol, 22.26 kJ/mol and 24.37 kJ/mol, respectively, and the process showed high selectivity toward the formation of MRO. Reaction kinetic agreed with the ping-pong Bi-Bi mechanism with the inhibition of CO, and the kinetic values ( V max , K m ′ and K IA ) were 0.0946 mol/(L·min), 1.6704 mol/L, and 0.89 mol/L, respectively.
研究领域:
生物化学
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可再生资源工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 29
·24773-24779
·
IF 3.289
Liuhua Yu,Gazi Hao,Shuai Zhou,Wei Jiang
With the continuous exploitation and utilization of oil resources, oil pollution has become increasingly serious, which not only causes economic loss, but also damages the living environment of human beings. Herein, oleic acid coated Fe3O4 particles and PS microspheres were introduced to the surface of pure foam through an inexpensive two-step immersion method; we obtained a durable and modified magnetic polystyrene foam (DMMPF) with high efficiency and selectivity. The as-obtained DMMPF exhibited superhydrophobicity, superoleophilicity, and fast magnetic response via the surface chemical modification. In addition, the as-prepared DMMPF could be used for continuous separation of various oils and organic solvents from the water surface. The absorption intake capacity of DMMPF was 40.1 times its own weight and the absorbed oils/organic solvents could be collected by simple mechanical extrusion. Furthermore, the as-prepared DMMPF retained an excellent absorption capacity and a large water contact angle after 60 separation cycles. It is recognized that DMMPF could be suitable for large-scale oil spill processing.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2019
·Vol. 21
·期 18
·5080-5089
·
IF 9.405
Jin Zhang,Lu Zhang,Jianguo Zhao,Wenshan Qu,Zhenxing Wang
Underwater superoleophobic and underoil superhydrophobic materials have distinct advantages for switchable oil–water separation. Although some strategies have been developed to fabricate these materials, harsh conditions such as high temperature and pressure, abundant harmful organic solvents and complicated devices are usually needed, limiting their practical applications. Moreover, due to the high adhesion properties of some oils such as crude oil, the anti-viscous oil-fouling performance of usual superwetting material is still unsatisfactory. Herein, based on the corrosion process and mussel-inspired surface coating, we have developed a mild and eco-friendly route to transform iron meshes into underwater superoleophobic and underoil superhydrophobic materials for switchable high viscosity oil–water separation. The corrosion process can generate microsphere-nanosheet structures (MNS) composed of microspheres and abundant nanosheet arrays on the iron mesh surface, while the subsequent mussel-inspired surface coating can form a compact layer to protect the MNS from damage, finally endowing the resultant mesh with durable underwater superoleophobicity and underoil superhydrophobicity. Significantly, the resultant mesh exhibits excellent anti-crude oil-fouling properties, and can separate various oil–water mixtures with high efficiency (all above 98%). Moreover, after immersion in acidic or basic solutions, the wetting properties of the mesh showed no apparent variation, demonstrating that the mesh possesses a desirable environmental stability. According to the dual superlyophobic properties of the as-prepared mesh in water–oil systems, a dual-channel device has been designed to realize the continuous separation of the crude oil–water mixture with high efficiency (above 93% after 30 cycles). This strategy may open a new avenue to prepare high-performance separation materials for viscosity oil–water separation.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2017
·Vol. 9
·期 11
·563
·
IF 3.364
Feiran Li,Ziran Wang,Yunlu Pan,Xuezeng Zhao
Superhydrophobic/superoleophilic surfaces (water contact angle greater than 150° with low hysteresis, with an oil contact angle smaller than 5°) have a wide-range of applications in oil/water separation. However, most of the essential methods to fabricate this kind of surface are complex, inflexible, and costly. Moreover, most methods focus on separating immiscible oil and water mixtures but lack the ability to demulsify surfactant-stabilized emulsions, which is widely present in industry and daily life. In this study, a facile and effective method was developed to fabricate superhydrophobic/superoleophilic surfaces that can be easily applied on almost all kinds of solid substrates. The treated porous substrates (e.g., steel mesh; cotton) can separate oil/water mixtures or absorb oil from a mixture. Furthermore, the compressed treated cotton is capable of demulsifying stabilized water-in-oil emulsions with high efficiency. The simple, low-cost, and material-unrestricted method provides an efficient way to separate oil/water mixtures of various kinds and has great potential in energy conservation and environmental protection.Keywords:superhydrophobic;superoleophilic;oil/water separation;stabilized water-in-oil emulsion
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Science and Technology
·
2023
·
IF 2.602
LI Ying,LEE Xiangjun,GUO Jianfeng,FENG Jingjing,XU Chenshuai,BAI Yujie,GUO Shiwei,WANG Fang
Palmitoleic acid (C16:1n7, POA), a 16-carbon ω-7 monounsaturated functional fatty acid, has been demonstrated a variety of beneficial properties to human health and a wide range of applications in nutrition, medical and chemical industries. Lipozyme® RM IM (Rhizomucor Miehei lipase), a Sn-1,3 specific lipase, was used to catalyze the hydrolysis of seabuckthorn fruit oil and produce monoglycates rich in palmitoleic acid. The fruit oil of seabuckthorn was used as the research object, the dosage of enzyme taking 10% wt.% oil, the influence of water/oil ratio, pH value and reaction temperature to hydrolysis rate were investigated, and then the response surface methodology was applied for optimizing the process conditions. Further, the relationship between the hydrolysis rate and the content of monoacylglycerol was studied under the optimal hydrolysis conditions. The result indicated that the optimal combined condition is as follows: the reaction temperature is 55°C, the pH is 7, the water-oil quality ratio is 1:1. The hydrolysis rate achieved 79.59% within 12 h in the condition above. Under the optimal conditions, the hydrolysis rate was positively correlated with the content of monoester, and the correlation coefficient was 0.999 within the first 10 h of the reaction. The hydrolysis rate was 66.76% at 10 h, and the content of monoglyceride reached the highest of 61.11%. Hereafter, the hydrolysis of monoglyceride began if the reaction continued. The content of palmitoleic acid increased from 27.11% to 40.84%, and that of linoleic acid increased from 4.51% to 33.34%, so the total amount of the two functional fatty acids reached 74.18%. Enzymatic hydrolysis can be an effective way to improve the function of seabuckthorn fruit oil.
研究领域:
食品科学
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生物化学
·
营养学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Oleo Science
·
2021
·
IF 1.601
Wenyi Chen,Maomao Kou,Shaoyan Lin,Nanjing Zhong
In this study, Candida antarctica lipase B (CALB), Rhizomucor miehei lipase (RML) and Lecitase® Ultra (LU) were immobilized onto the mesoporous silica SBA-15. The glycerolysis performance of the obtained supported lipases (lipase@SBA-15) in solvent systems was carefully investigated. LU@SBA-15 exhibited good glycerolysis performance in solvent-free system, with diacylglycerols (DAG) content and triacylglycerols (TAG) conversion at 52.4 and 98.6% respectively obtained after 12 h reaction at 60°C. CALB@SBA-15 showed good glycerolysis activity in tert-pentanol and tert-butanol systems, with TAG conversion over 90% obtained. In addition, the present CALB@SBA-15 exhibited selectivity for monoacylglycerols (MAG) production, with glycerol to TAG molar ratio increased to 3:1, MAG content over 80% and TAG conversion over 99% could be obtained from both tert-pentanol and tert-butanol systems. However, RML@SBA-15 showed low glycerolysis activity neither in solvent nor in solvent-free systems. The present results favor the practical enzymatic design for MAG and DAG production.
研究领域:
生物化学
·
酶工程
✓ 已验证
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Yiwen Guo,Zitao Nie,Minjie Cao,Tian Yang,Guanjun Tao,Lijun Song,Ruijie Liu,Ming Chang,Xingguo Wang
Chimonanthus praecox (L.) Link kernel oil (LMO) has the potential to expand the variety of nutraceutical plant oils available and provide support for the application of functional food. This study aimed to assess the edible potential of LMO by examining its physicochemical characteristics, digestion behaviors, and nutraceutical properties. The results revealed that LMO has a high oil content of 40.84% and is particularly rich in linoleic acid (53.37–56.30%), oleic acid (22.04–25.08%) and triacylglycerol (TAG) of linoleic acid -palmitoleic acid- oleic acid (10.57–12.70%). The quality characteristics and phytochemical composition of LMO were found to be influenced by variety and extraction methods used. In simulated in vitro digestion tests, LMO showed a better lipid release rate and degree. Animal studies further demonstrated that LMO led to better TAG and cholesterol excretion compared to soybean oil and camellia oleifera oil. Overall, this study highlights the potential of LMO as a high-quality edible oil .
研究领域:
食品科学
·
植物学
·
营养学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 91
·88001-88009
·
IF 3.289
Ziai Liu,Xuyue Wang,Mingqian Gao,Jinlong Song,Liu Huang,Jiyu Liu,Xin Liu,Wei Xu,Danyang Zhao
Oil spills seriously pollute the environment and cause huge economic losses. Recently, materials with extreme wettability are widely used for oil/water separation. However, the existing methods have drawbacks including complicated and costly fabrication processes for oil/water separation materials, limited oil collecting capacity and reduced oil/water separation efficiency after being polluted by oil, etc. Therefore, an efficient and low-cost method for oil spill collection is urgently needed. We proposed a one-step immersion method to fabricate an oil spill absorption material. Superhydrophobicity and superoleophilicity were obtained by a common polyurethane sponge after being immersed into a cupric stearate solution and drying process. Water droplets can be supported as a spherical shape with a contact angle above 155.5° and can easily roll off from the surface, while hexane, hexadecane, diesel oil, peanut oil and lubricating oil can spread completely on the modified sponge. The prepared sponge can maintain water repellency after continuous oil spill collection for more than 4 h. A large-scale oil skimmer was designed to collect oil spills by employing the extreme wettability sponge and was successfully used for the collection of floating diesel oil, peanut oil, and lubricating oil on water. This method is simple, low cost and mass-producable, and the obtained oil skimmer possesses a high oil collection capacity, excellent durability and recyclability. Therefore, it has application prospects for the collection of oil spills on the sea or under other harsh conditions.
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
危险品化学品经营许可证（带存储）