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Effect of Biodiesel on oxidation stability, Detergency and Antiwear Ability of Diesel Oil

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China Petroleum Processing & Petrochemical Technology 2011年第4期13卷 58-63页

作者： Wu Jiang Chen Boshui Fang Jianhua Wang Jiu (Department of Petrochemistry, Logistical Engineering University, Chongqing 401311) Dept. of Petrochemistry Logistical Engineering University University Town Chongqing 401311 China

Different contents of biodiesel and petrodiesel were incorporated into diesel engine oils. The oxidative stability, detergency and antiwear performance of the formulated diesel oils were evaluated. The results indicated that, compared with petrodiesel, biodiesel was more liable to promote oxidation degradation of diesel oils, leading to worse oxidative stability, detergency and antiwear ability of the oils.

关键词： biodiesel diesel oil oxidation stability detergency antiwear ability

Quality, fatty acid composition and oxidation stability of ten cold-pressed seed oils

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Oil Crop Science 2016年第4期1卷 19-29页

作者： Chang Zheng Mei Yang Qi Zhou Wenlin Li Changsheng Liu Miao Zhang Fenghong Huang Oil Crops Research Institute Chinese Academy of Agricultural Sciences Wuhan China Hubei Key Laboratory of Lipid Chemistry and Nutrition Wuhan China

Cold-pressed oils from six herb plant seeds and four woody plant seeds were analyzed and compared for their quality characteristics such as oil, crud protein, shell, and moisture content, fatty acid （FA） compositions and oxidation stability. Results showed that walnut kernel contained the greatest amount of seed oil and safflower seed contained the lowest. Safflower, pumpkin, hemp, camellia and peony seeds had high shell content, their kernel oil content significantly increased after shelling. These oils had significant differences （p〈0.01） in levels of fatty acids and the ratio of n-6：n-3 fatty acids. Camellia, safflower, and flax seed oil contained the highest oleic acid, linoleic acid, and a-linolenic acid respectively. Hemp seed oil was observed in a 3.53：1 ratio of n-6 and n-3 fatty acids. All these ten oils were obviously different in moisture and volatile content, acid value, peroxide value and induction period （IP）（p〈0.01）. IP of peony seed oil was lowest （0.94 h） and almond oil was the highest （14.10 h）. IP of oils negatively correlated with polyunsaturated fatty acids content ^=-0.664, p=0.036）. These studies of ten cold-pressed oils may provide better explanation for their potential health benefits and further developing their commercial value.

关键词： cold-pressed oil fatty acid composition oxidation stability food analysis food quality

Increase of oxidation stability of Biodiesel from Palm Fatty Acid Distillate (PFAD) by Antioxidant Additions

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Increase of Oxidation Stability of Biodiesel from Palm Fatty...

Study of selective hydrogenation of biodiesel in a DBD plasma reactor

作者： Herawati Budiastuti Sri Widarti Riniati Department of Chemical Engineering Polytechnic State of Bandung

Biodiesel is a renewable energy,possesses high cetane number and flash points,resulting in its suitable uses in diesel machines and its safe distribution and storage,as well as low gas emission,and its function as lubricant. Disadvantages of the biodiesel include its high density and viscosity,resulting in plug and ineffective injection system,and low oxidation stability. This research studied about antioxidant additions to maintain oxidation stability of biodiesel. Induction period(IP) measuring kit,to measure oxidation stability,was constructed by using modified Rancimat principle. The best operation conditions were at temperature of 1100 C and pressure of 6 hours).

关键词： Antioxidant biodiesel oxidation stability PFAD

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Plasma Science and Technology 2021年第9期23卷 184-193页

作者： Weidong ZHAO Chao HUA Xiaoyin ZHANG Xiaolong QI Kiatsiriroat TANONGKIAT Junfeng WANG School of Automotive and Traffic Engineering Jiangsu UniversityZhenjiang 212013People's Republic of China Department of Mechanical Engineering Faculty of EngineeringChiang Mai UniversityChiang Mai 50200Thailand School of Energy and Power Engineering Jiangsu UniversityZhenjiang 212013People's Republic of China

In order to achieve the selective hydrogenation of biodiesel at room temperature and under normal pressure,we researched the upgrading of soybean biodiesel using a dielectric-barrier discharge(DBD)reaction *** Raney-Ni as the hydrogenation catalyst,the effects of the operating parameters on the hydrogenation depth and the selectivity of biodiesel were systematically *** results show that the polyunsaturated components in soybean methyl ester were reduced by 57.04%,and that the polyunsaturated components were hydrogenated to monounsaturated components with a selectivity of 77.75%.Based on the gas chromatography and mass spectrometry(GC-MS)test results,we established a kinetic model for biodiesel hydrogenation.A comparison of the calculated and experimental results shows that the hydrogenation of the biodiesel can be described by a quasi first-order reaction *** calculated reaction rate constants indicate that under DBD plasma reaction conditions,the hydrogenation of biodiesel has high selectivity for the formation of monounsaturated components.

关键词： biodiesel selectivity hydrogenation dielectric-barrier discharge oxidation stability saturation

Investigation of extracted Sclerocarya birrea seed oil as a bioenergy resource for compression ignition engines

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International Journal of Agricultural and Biological Engineering 2012年第3期5卷 59-67页

作者： Ejilah Robinson Abdulkadir Lukman Adisa Bello Department of Mechanical Engineering Technology Federal PolytechnicBauchiNigeria Mechanical Engineering Programme Abubakar Tafawa Balewa UniversityBauchiNigeria

Sclerocarya birrea(Marula)seed oil was extracted and characterized for its physico-chemical properties and fatty acid compositions,respectively,by using standardized laboratory methods of the Association of Official and Analytical Chemist(AOAC).The fuel and lubrication properties of marula oil were also determined by using the ASTM methods,and the oil was evaluated in terms of its antiwear,viscometrics,volatility,stability,environmental compatibility properties and energy *** was found that the high percentage of mono-unsaturated oleic acid(73.6%)provided the oiliness that makes marula oil a natural alternative to genetically modify high oleic acid sunflower oil used in biodiesel *** aggregate properties of seed oiliness as exemplified by the high oleic acid content,high saponification value(178.6 mg/KOH)and viscosity(41 mm2/s)makes marula oil to be prospective based oil for engine crank case biolubricants with antiwear and friction reduction ***,the higher oil viscosity exhibited by marula seed oil in comparison to diesel could pose some durability problems to compression ignition engines,when used directly as ***,the reduction of oil viscosity would be required by heating,blending with diesel fuel,or by transesterification to forestall the risk of engine failure resulting from the use of unmodified marula *** flash point of marula oil(235℃)is somewhat close to that of monograde SAE 40 mineral oil(240℃),and appreciably higher than that of diesel fuel(52℃).The high flash point makes the seed oil less flammable and ensures safer handling and ***,the low pour point(-13.7℃)ensures the oil usability for engines at cold start and under low load *** oxidation stability of marula oil is ascribed to the traces of natural antioxidants presented in the oil and improves the oil’s shelf life,notwithstanding the high peroxide value(4.58 mequiv/kg),and linolenic acid content(0.3%),which ought to have be

关键词： marula seed oil high oleic acid oxidation stability cetane number heating value bioenergy resource compression ignition engine

New Progress in Design and EngineeringDevelopment of Hydrogenation Units3 - Engineering Development and Commercial Application of Lube Oil Hydrogenation Technology

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China Petroleum Processing & Petrochemical Technology 2000年第4期2卷 23-27页

作者： Liu Jiaming SINOPEC Beijing Design Institute China

　　1 Introduction　　 With the automotive industry embarking on the development route toward high speed, energy conservation,low fuel consumption, low emissions and extended oil condemning limits in the 1990s, better quality lubricant products are needed. The previous approach for improving the performance of lubricant products through adjustment of additive composition can no more meet the demand. Higher requirements for the quality of lube base stocks are raised. These requirements are:(1) higher oxidation stability; (2) better viscosity temperature performance; (3) better low temperature flow property; and (4) excellent shearing stability and antiwear property. In the meantime, the development of industrial technology and stricter environmental and safety requirements have raised their demand for highquality industrial lubricating oils. The quality of mineral lubricating oils made by traditional means of lube technology has been reaching its limits without room for further improvement. In addition the crude oil resources that are suitable for making lube oils are depleting. The lube oil production is forced to opt for the inferior heavy crude, posing a difficult dilemma for the traditional petroleum processing industry.……

关键词： Lube Oil lubricating oils oxidation stability automotive industry fuel consumption low temperature oil production high speed crude oil

Comparative Evaluation of the Thermal Aging of Solid Insulation in Mineral Oil and Methyl Ester of Palm Kernel Oil

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Journal of Power and Energy Engineering 2021年第5期9卷 166-183页

作者： Gerard Ombick Boyekong Ghislain Mengata Mengounou Adolphe Moukengue Imano Technology and Applied Sciences Laboratory University of Douala Douala Cameroon

The purpose of this work is to determine the impact of thermal aging on the dielectric and physicochemical properties of the oil/paper mixed insulation. We performed a comparative analysis of dielectric paper dipped in two cooling fluids: palm kernel oil methyl ester (MEPKO) and mineral oil (MO). Two types of dielectric paper were used: Thermally Upgraded Kraft paper (TUK) and Nomex-910 paper (NP-910). An accelerated aging test was realized at 110°C during a total of 96 hours. Samples of oil and paper were collected after 0, 48, 72 and 96 hours for analyses purposes. The analyses performed included the measurement of the Breakdown voltage (BDV) of the dielectric papers, the Total Acid Number (TAN) and the Decay Dissolved Products (DDP) of the liquid dielectrics. The BDV of NP-910 is greater than the BDV of TUK. Concerning the type of oil, the BDV of dielectric papers impregnated with MEPKO is greater than the BDV of similar papers impregnated with MO, indicating a better preservation of paper when dipped in methyl esters. The analyses of TAN and DDP revealed that Nomex-910 improves the oxidation stability of MO, but reduces the oxidation stability of MEPKO. These results prove that methyl esters can be used as a substitute to replace mineral oils in power transformers. Furthermore, they show that NP can be used mainly in areas of transformer where solid insulation is subjected to high thermal and electrical stress, and TUK other places where solid insulation is required. Such combination could assure money savings and a better preservation of the oil viscosity.

关键词： Oil/Paper Mixed Insulation Methyl Ester Thermal Aging Breakdown Voltage oxidation stability

Fast Evaluation Peanut Oil Quality by Synchronous Fluorescence Spectroscopy and Statistical Analysis

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Agricultural Sciences 2021年第5期12卷 565-574页

作者： Weiwei Zhang Riqin Lv Yanhui Sun Haiyang Gu School of Biotechnology and Food Engineering Chuzhou University Chuzhou China

Peanut oil oxidation was to monitor and quantify combining synchronous fluorescence spectroscopy and chemometrics. Peanut oil was subjected to an accelerated oxidation testing. The spectral and related chemical indicators were caught during oxidation induce testing. Fluorescence spectra were gained for each sample with simultaneous excitation from 200 to 800 nm and the offsets (Δλ) of 10 to 180 nm during the oxidation process. The results showed the induce period (IP) of the peanut oil was 16.45 h. Parallel factor analysis (PARAFAC) was performed to select the best Δλ interval of 70 nm, which spectral data was the most suitable for interval partial least square (iPLS) and synergy interval PLS (siPLS) modeling and forecast. The study presented all interval selection methods had the better results than the global spectrum modelling. iPLS reached the best into 10 intervals with a ratio of prediction to deviation (RPD) of 2.10. siPLS that separated the whole spectrum into 15 intervals and combined the third intervals (282 to 320 nm, 362 to 400 nm, and 761 to 800 nm) had a ratio of RPD of 2.26. The results showed the optimal siPLS model performed a little better than iPLS. The established model lying on interval selection could improve the prediction accuracy. It could provide a quick, accurate method to monitor oil oxidation process.

关键词： Synchronous Fluorescence Spectroscopy Peanut Oil oxidation stability Chemometrics

Fast Evaluation Peanut Oil Quality by Synchronous Fluorescence Spectroscopy and Statistical Analysis

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Fast Evaluation Peanut Oil Quality by Synchronous Fluorescen...