Relevant bibliographies by topics / Natural ester oils

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Natural ester oils'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Natural ester oils"

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Prasad, D., and S. Chandrasekar. "EFFECT OF NANO-SiO2 PARTICLES ON PARTIAL DISCHARGE SIGNAL CHARACTERISTICS OF FR3 TRANSFORMER OIL." JOURNAL OF ADVANCES IN CHEMISTRY 13 (February 7, 2017): 6208–17. http://dx.doi.org/10.24297/jac.v13i0.5687.

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Liquid insulation for high voltage transformer applications based on natural esters derived from abundantly available vegetable oils are becoming popular in recent times. Since these natural ester based oils have environmental advantages and superior thermal performance, electrical utilities are slowly replacing the conventional mineral oils with natural ester based vegetable oils. FR3 oil, which is a soya based natural ester oil with superior dielectric and thermal characteristics, is becoming popular as an alternate insulating medium for high voltage transformers. With recent developments in
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Li, Huaqiang, Linfeng Xia, Shengwei Cai, Zhiqiang Huang, Jiaqi Li, and Lisheng Zhong. "Influence of Molecule Structure on Lightning Impulse Breakdown of Ester Liquids." Energies 14, no. 4 (2021): 1061. http://dx.doi.org/10.3390/en14041061.

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Ester liquids are environmentally friendly insulating oils, and they can be used as an alternative to mineral oil in transformers, even though in most countries spills of ester oils must be treated like spills of mineral oil. Furthermore, the breakdown characteristics of ester liquids are worse than those of mineral oils in heterogeneous electric fields. In this paper, we present a comprehensive experimental research on both positive and negative lightning impulse breakdown properties in point-plane geometries with gaps varying from 1 mm to 50 mm. The breakdown voltages and streamer velocities
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Ridzuan, N. L. M., N. A. Bakar, S. A. Ghani, I. S. Chairul, and N. H. A. Aziz. "Comparative study on the accelerated thermal aging behavior between palm and rapeseed natural ester oils." Bulletin of Electrical Engineering and Informatics 8, no. 3 (2019): 735–43. http://dx.doi.org/10.11591/eei.v8i3.1590.

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The suitability of natural ester oils as an insulating medium in power transformers is discussed in this paper. Owing to environmental concerns, natural ester oils have great potential as mineral oil substitutes in power transformers. In this paper, the aging behaviors of palm and rapeseed natural ester oils were compared with that for mineral oil. The performance of these natural ester oils was assessed based on their properties (moisture content, acidity, and relative content of dissolved decay products) after accelerated thermal aging. The results showed that the palm oil has better perform
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Boontawee, Hasleena, Charoen Nakason, Azizon Kaesaman, Anoma Thitithammawong, and Sopa Chewchanwuttiwong. "Influence of Benzyl Ester Oil on Processability of Silica Filled NR Compound." Advanced Materials Research 844 (November 2013): 221–24. http://dx.doi.org/10.4028/www.scientific.net/amr.844.221.

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Modified benzyl esters from coconut, palm, and soybean oil were used as alternative rubber processing oil to replace distillate aromatic extract oil (DAE). The effect of benzyl esters on mixing, curing properties, polymerfiller interaction and Mooney viscosity was investigated in silica filled natural rubber compound. Benzyl ester oil was found to be effective processing oil with decreasing of mixing energy and Mooney viscosity. Furthermore, it was found that coconut and palm benzyl esters showed higher torque difference than the aromatic oil filled compound. Also, benzyl ester oil gave simila
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Totzauer, Pavel, and Pavel Trnka. "Different Ways to Improve Natural Ester Oils." Transportation Research Procedia 40 (2019): 102–6. http://dx.doi.org/10.1016/j.trpro.2019.07.017.

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Kodali, Dharma R. "High performance ester lubricants from natural oils." Industrial Lubrication and Tribology 54, no. 4 (2002): 165–70. http://dx.doi.org/10.1108/00368790210431718.

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Chairul, Imran Sutan, Sharin Ab Ghani, Nur Hakimah Ab Aziz, Mohd Shahril Ahmad Khiar, Muhammad Syahrani Johal, and Mohd Aizzat Azmi. "Effect of electrical discharge on the properties of natural esters insulating fluids." Indonesian Journal of Electrical Engineering and Computer Science 23, no. 3 (2021): 1281. http://dx.doi.org/10.11591/ijeecs.v23.i3.pp1281-1288.

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<p>Vegetable oils have been an alternative to mineral oil for oil-immersed transformers due to concern on less flammable, environmental-friendly, biodegradable, and sustainable resources of petroleum-based insulating oil. This paper presents the effect of electrical discharges (200 up to 1000 discharges) under 50 Hz inhomogeneous electric field on the properties (acidity, water content, and breakdown voltage) of two varieties of vegetable based insulating oils; i) natural ester (NE) and ii) low viscosity insulating fluids derived from a natural ester (NE<sub>LV</sub>). Result
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Lingvay, Iosif, Ion Patru, Livia Carmen Ungureanu, Valerica Stanoi, and Adriana Mariana Bors. "Electro-insulating Paper Degradation in Various Electro-insulating Fluids." Revista de Chimie 69, no. 1 (2018): 91–95. http://dx.doi.org/10.37358/rc.18.1.6050.

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The durability and safe operation of electrical equipment and devices with mixed insulation systems (solid/fluid - electro-insulating paper/oil) is determined by the insulation aging under simultaneous and synergic actions of electrical, thermal and chemical stress factors etc. In this context, degradations of insulating paper exposed to thermal aging in 5 different types of electro-insulating fluid have been studied experimentally. Liquid chromatography determinations have shown that the total content in furan products (resulting from cellulose degradation) in mineral oils is substantially hi
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Wilhelm, H. M., M. B. C. Stocco, L. Tulio, W. Uhren, and S. G. Batista. "Edible natural ester oils as potential insulating fluids." IEEE Transactions on Dielectrics and Electrical Insulation 20, no. 4 (2013): 1395–401. http://dx.doi.org/10.1109/tdei.2013.6571461.

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Zdanowski, Maciej. "Electrostatic Charging Tendency Analysis Concerning Retrofilling Power Transformers with Envirotemp FR3 Natural Ester." Energies 13, no. 17 (2020): 4420. http://dx.doi.org/10.3390/en13174420.

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Natural and synthetic esters are liquids characterized by insulating properties, high flash point, and biodegradability. For this reason, they are more and more often used as an alternative to conventional mineral oils. Esters are used to fill new or operating transformers previously filled with mineral oil (retrofilling). It is technically unfeasible to completely remove mineral oil from a transformer. Its small residues create with esters a mixture with features significantly different from those of the base liquids. This article presents electrostatic charging tendency (ECT) tests for mixtu
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Dissertations / Theses on the topic "Natural ester oils"

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Liu, Qiang. "Electrical performance of ester liquids under impulse voltage for application in power transformers." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/electrical-performance-of-ester-liquids-under-impulse-voltage-for-application-in-power-transformers(3702b3a2-ec5f-4674-ab11-1032906e8c0c).html.

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Ester liquids including both natural ester and synthetic ester are being considered as potential alternatives to mineral oil, due to their better environmental performance and for some liquids their higher fire point. Although these liquids have been widely used in distribution and traction transformers, it is still a significant step to adopt ester liquids in high-voltage power transformers because the high cost and severe consequence of a factory test failure and the high level of safety and reliability required in service for these units, tend to lead to a cautious approach to any step chan
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Jurčák, Tomáš. "Komparace elektrických vlastností alternativních elektroizolačních kapalin a minerálních olejů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-254473.

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Master thesis deals with electrical insulating fluids in electrical engineering. It includes the distribution of liquids by ISO standard, distribution of oils and the current state of research into alternative electrical insulating liquids and description of selected dielectric properties. Furthermore, measurements were taken of selected electrical properties of the samples, and later their evaluation.
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Κόικα, Αλεξάνδρα. "Πειραματική μελέτη σύνθετου διάκενου ελαίου χάρτου". Thesis, 2014. http://hdl.handle.net/10889/8254.

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Είναι γνωστό ότι ο πιο σημαντικός παράγοντας για την προστασία και τη σωστή λειτουργία ενός εξοπλισμού υψηλής τάσης είναι η μόνωση του. Η πιο διαδεδομένη μορφή μόνωσης είναι η χρήση υγρών διηλεκτρικών, και συγκεκριμένα ελαίων. Αρχικά, χρησιμοποιούσαν μόνο ορυκτά έλαια ως μονωτικό υλικό διοτί ήταν εύκολη η διάθεση τους. Τα τελευταία όμως χρόνια, ήθισται να προτιμούνται φυτικά έλαια έναντι των ορυκτών, χάρη των ιδιοτήτων και πλεονεκτημάτων που παρουσιάζουν. Τα βασικά πλεονεκτήματα είναι η φιλικότητα τόσο προς το περιβάλλον όσο και στον άνθρωπο, η μη τοξικότητα τους, το υψηλό σημείο ανάφλεξ
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Δημακοπούλου, Παναγιώτα. "Διηλεκτρικές δοκιμές ελαίων φυτικής προέλευσης". Thesis, 2011. http://hdl.handle.net/10889/4913.

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Η μόνωση του εξοπλισμού και των εγκαταστάσεων υψηλής τάσης είναι απαραίτητη προκειμένου να διατηρηθεί η διαφορά δυναμικού μεταξύ των υπό υψηλή τάση αγώγιμων μερών. Παράλληλα με τον κύριο προορισμό της, η μόνωση μπορεί να έχει και άλλους ρόλους, όπως η μηχανική στήριξη των αγωγών, η ανταλλαγή θερμότητας κ.ά. Στην παρούσα εργασία ασχοληθήκαμε με τα ηλεκτροτεχνικά υγρά τόσο θεωρητικά όσο και πειραματικά. Σε θεωρητικό επίπεδο, περιγράφουμε το ρόλο των μονωτικών λαδιών, τις χρήσεις, τις ιδιότητες τους και τους παράγοντες που τα επηρεάζουν. Σε πειραματικό επίπεδο πραγματοποιούμε πλήθος μετρήσεων μ
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Book chapters on the topic "Natural ester oils"

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Bakrutheen, M., M. Willjuice Iruthayarajan, and S. Senthil Kumar. "Investigation on the Properties of Natural Esters Blended with Mineral Oil and Pyrolysis Oil as Liquid Insulation for High Voltage Transformers." In Lecture Notes in Electrical Engineering. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4852-4_17.

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Calvert, Jack, Abdelwahid Mellouki, John Orlando, Michael Pilling, and Timothy Wallington. "Rate Coefficients and Mechanisms of Atmospheric Oxidation of the Esters." In Mechanisms of Atmospheric Oxidation of the Oxygenates. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199767076.003.0010.

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Esters are emitted directly into the atmosphere from both natural and anthropogenic sources and are produced during the atmospheric oxidation of ethers. Methyl acetate and ethyl acetate have found widespread use as solvents. Vegetable oils and animal fats are esters. Transesterification of vegetable oils and animal fats with methanol gives fatty acid methyl esters (FAMEs) which are used in biodiesel. Many esters have pleasant odors and are present in essential oils, fruits, and pheromones, and are often added to fragrances and consumer products to provide a pleasant odor. Table VII-A-1 provides a list of common esters and their odors. It is surprising to note that despite their ubiquitous nature, volatility, and fragrance, it is only very recently that quantitative measurements of esters in ambient air have been reported (Niedojadlo et al., 2007; Legreid et al., 2007). The atmospheric oxidation of saturated esters is largely initiated by OH radical attack. Reaction with O3 and NO3 radicals contributes to the atmospheric oxidation of unsaturated esters. As discussed in chapter IX, UV absorption by esters is only important for wavelengths below approximately 240 nm and, hence, photolysis is not a significant tropospheric loss mechanism. When compared to the ethers from which they can be derived, the esters are substantially less reactive towards OH radicals. The ester functionality —C(O)O— in R1C(O)OR2 deactivates the alkyl groups to which it is attached with the deactivation being most pronounced for the R1 group attached to the carbonyl group. The atmospheric oxidation mechanisms of the esters are reviewed in the present chapter. The reaction of OH with methyl formate has been studied by Wallington et al. (1988b) and Le Calvé et al. (1997a) over the temperature range 233–372 K. Data are summarized in table VII-B-1 and are plotted in figure VII-B-1. The room temperature determination of k(OH + CH3OCHO) by Wallington et al. is in agreement with that by Le Calvé et al. (1997) within the experimental uncertainties. Significant curvature is evident in the Arrhenius plot in figure VII-B-1.
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Bertha Ehis-Eriakha, Chioma, Stephen Eromosele Akemu, Simon Obgaji Otumala, and Chinyere Augusta Ajuzieogu. "Biotechnological Potentials of Microbe Assisted Eco-Recovery of Crude Oil Impacted Environment." In Crude Oil - New Technologies and Recent Approaches [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.98808.

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Globally, the environment is facing a very challenging situation with constant influx of crude oil and its derivatives due to rapid urbanization and industrialization. The release of this essential energy source has caused tremendous consequences on land, water, groundwater, air and biodiversity. Crude oil is a very complex and variable mixture of thousands of individual compounds that can be degraded with microbes with corresponding enzymatic systems harboring the genes. With advances in biotechnology, bioremediation has become one of the most rapidly developing fields of environmental restoration, utilizing microorganisms to reduce the concentration and toxicity of various chemical pollutants, such as petroleum hydrocarbons, polycyclic aromatic hydrocarbons, polychlorinated biphenyls, phthalate esters, nitroaromatic compounds and industrial solvents. Different remediation methods have been introduced and applied with varied degrees of success in terms of reduction in contamination concentration without considering ecotoxicity and restoration of biodiversity. Researchers have now developed methods that consider ecotoxicology, environmental sustainability and ecorestoration in remediation of crude oil impacted sites and they are categorized as biotechnological tools such as bioremediation. The approach involves a natural process of microorganisms with inherent genetic capabilities completely mineralizing/degrading contaminants into innocuous substances. Progressive advances in bioremediation such as the use of genetically engineered microbes have become an improved system for empowering microbes to degrade very complex recalcitrant substances through the modification of rate-limiting steps in the metabolic pathway of hydrocarbon degrading microbes to yield increase in mineralization rates or the development of completely new metabolic pathways incorporated into the bacterial strains for the degradation of highly persistent compounds. Other areas discussed in this chapter include the biosurfactant-enhanced bioremediation, microbial and plant bioremediation (phytoremediation), their mechanism of action and the environmental factors influencing the processes.
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Keefer, Robert F. "Soil Organic Matter." In Handbook of Soils for Landscape Architects. Oxford University Press, 1999. http://dx.doi.org/10.1093/oso/9780195121025.003.0018.

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Soil organic matter (SOM) is probably the most important constituent of soils. The effect of SOM on soil properties far exceeds the relative percentage of this material in soils. The small amount of organic matter in soils, usually from 1 to 5%, is very important in providing a reserve food source for microorganisms and higher plants. Almost all properties of SOM are beneficial for plant growth. Soil organic matter can be defined as a complex, heterogeneous mixture of plant and animal remains in various stages of decay, microbial cells—both living and dead—microbially synthesized compounds, and derivatives of all of the above through microbial activity. Soil organic matter is probably the most complex of all naturally occurring substances. Some compounds in SOM are distinctive to soil and are not present in plants or animals. By examining the composition of SOM, one can see why it is such a complex material. The following compounds have been isolated from chemical SOM extracts: . . . 1. Carbohydrates (sugars, polysaccharides)—about 75% of dry weight 2. Lignin (a plant polymer of phenyl propane units) 3. Proteins (combinations of amino acids) 4. Hydrocarbons—fats, waxes, resins, and oils 5. Tannins (phenolic substances) 6. Pigments (chlorophyll) 7. Organic acids (many in the biochemical Krebs cycle) 8. Miscellaneous compounds—includes organic P, organic S, polynuclear hydrocarbons, nucleic acid derivatives, alcohols, aldehydes, esters, etc. . . . Whenever organic materials are added to a soil the physical properties of soil structure, water-holding capacity, and soil color are changed. The extent of change in these properties depends on the amount and type of organic material added, the soil microorganisms present in the soil, and the speed at which decomposition occurs. Aggregation and granulation (crumb formation) is increased by polysaccharides produced by microorganisms during decomposition. This improves soil tilth (ability to work the soil) and helps stabilize the soil crumbs. The ability of a soil to hold water is greatly increased by addition of SOM. This results in greater infiltration (water moving into the soil) and adsorption of water by the SOM, with consequently less erosion and loss of soil particles and fertility.
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Conference papers on the topic "Natural ester oils"

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Hamid, M. H. A., M. T. Ishak, M. F. Md Din, N. S. Suhaimi, and N. I. A. Katim. "Dielectric properties of natural ester oils used for transformer application under temperature variation." In 2016 IEEE International Conference on Power and Energy (PECon). IEEE, 2016. http://dx.doi.org/10.1109/pecon.2016.7951472.

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Li, Jian, Jinghan Zhou, Chenmeng Xiang, Zhengyong Huang, Jianfeng He, and Muhammad Ali Mehmood. "Novel Approaches of DGA to Transformers Filled with Natural Ester Based Insulating Oils." In 2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika). IEEE, 2018. http://dx.doi.org/10.1109/diagnostika.2018.8526095.

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Dang, Viet-Hung, A. Beroual, and C. Perrier. "Comparative study of statistical breakdown in mineral, synthetic and natural ester oils under AC voltage." In 2011 IEEE 17th International Conference on Dielectric Liquids (ICDL). IEEE, 2011. http://dx.doi.org/10.1109/icdl.2011.6015408.

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Chen, Cheng, Shengwei Cai, Jiangbo Chen, et al. "Research on the dissolved gas analysis of electrical fault simulation of natural ester insulating oils." In 2018 12th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). IEEE, 2018. http://dx.doi.org/10.1109/icpadm.2018.8401030.

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Dang, Viet-Hung, A. Beroual, and C. Perrier. "Comparative study of streamer phenomena in mineral, synthetic and natural ester oils under lightning impulse voltage." In 2010 International Conference on High Voltage Engineering and Application (ICHVE). IEEE, 2010. http://dx.doi.org/10.1109/ichve.2010.5640765.

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Pompili, M., L. Calcara, S. Sangiovanni, F. Scatiggio, M. Mazzaro, and D. De Bartolomeo. "Natural Esters and Mineral Oils Fire Behavior." In 2018 IEEE 2nd International Conference on Dielectrics (ICD). IEEE, 2018. http://dx.doi.org/10.1109/icd.2018.8468447.

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Pompili, M., L. Calcara, S. Sangiovanni, F. Scatiggio, M. Mazzaro, and D. De Bartolomeo. "Natural Esters and Mineral Oils Fire Behavior." In 2018 IEEE 2nd International Conference on Dielectrics (ICD). IEEE, 2018. http://dx.doi.org/10.1109/icd.2018.8514723.

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Spohner, Milan. "Study of dielectric properties of mineral oils and natural oils and methyl esters of natural oils." In 2017 IEEE 19th International Conference on Dielectric Liquids (ICDL). IEEE, 2017. http://dx.doi.org/10.1109/icdl.2017.8124717.

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Nagaraj, A. M., and G. P. Prabhu Kumar. "Emission and Performance Characteristics of a Single Cylinder Compression Ignition Engine Operating on Esterified Rice Bran Vegetable Oil and Diesel Fuel." In ASME 2002 Internal Combustion Engine Division Fall Technical Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/icef2002-521.

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The alkyl monoesters of fatty acids derived from vegetable oils or animal fats, known as bio diesel, are attracting considerable interest as an alternative fuel for diesel engines. Biodiesel-fueled engines produce less carbon monoxide, unburnt hydrocarbons, and particulate emissions than diesel-fueled engines. However, bio diesel has different chemical and physical properties than diesel fuel, including a larger bulk modulus and a higher cetane number. Some of these properties can be affected by oxidation of the fuel during storage. These changes can affect the timing of the combustion process
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Bandara, Kapila, Chandima Ekanayake, and Tapan Kumar Saha. "Compare the performance of natural ester with synthetic ester as transformer insulating oil." In 2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). IEEE, 2015. http://dx.doi.org/10.1109/icpadm.2015.7295437.

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