Lubricant basestocks from vegetable oils |
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| Affiliation: | 1. School of Mechanical Engineering, Lovely Professional University Punjab, India;2. Production Engineering and Mechanical Design Department, Faculty of Engineering, Tanta University, Tanta, Egypt;3. Automotive and Tractors Engineering Department, Faculty of Engineering, Minia University, El-Minia 61519, Egypt;1. Department of Automobile Engineering, Hindusthan College of Engineering and Technology, Coimbatore 641 032, India;2. Department of Mechanical Engineering, Sri Krishna College of Engineering and Technology, 641 008, India;3. Department of Automobile Engineering, Hindusthan Institute of Technology, Coimbatore 641 032, India;1. Center for Energy Science, Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;2. Division of Mechanical and Automotive Engineering, Kongju National University, 275, Budae-dong, Cheonan-si, Chungcheongnam-do 331-717, South Korea;3. Department of Textile Engineering, Mawlana Bhashani Science and Technology University, Santosh, Tangail 1902, Bangladesh;4. Department of Mechanical Engineering, Dhaka University of Engineering and Technology, Gazipur 1700, Bangladesh |
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| Abstract: | Compared to the lubricants made of petroleum, vegetable-based lubricants are much more biodegradable but inferior in many other technical characteristics. The basestock typically contributes to more than 80% of lubricant and must meet performance criteria in such aspects as cleanliness, viscometric properties, volatility, oxidative and hydrolytic stability, deposit forming tendencies, solvency, miscibility or compatibility with system elastomers and other. For vegetable-based lubricants, oxidative stability and low temperature problems are considered the most critical. Thin film oxidation test was used to compare oxidative stabilities. Vegetable oils appear an order of magnitude less stable than mineral oils or synthetic biodegradable basestocks, such as isoalkyl adipates or poly alphaolefins. Low temperature performance of vegetable oils, namely pour points and cold storage, was also problematic. These problems can only partially be relieved by lubricant additives, thus vegetable oils have to be modified chemically to eliminate sites susceptible to oxidation and to disrupt formation of crystals at low temperatures. |
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