Comparative Tribological Investigation Of Bio-Lubricant Formulated From Waste Cooking Oil

Dayang Nor Fatin, Mahmud (2015) Comparative Tribological Investigation Of Bio-Lubricant Formulated From Waste Cooking Oil. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The use of lubricant is still applied extensively in automotive industry. Nowadays, most of the lubricants which are available in the market are based on mineral oil, derived from petroleum oil that are not adaptable to the environment because of their toxicity and non-biodegradability. Besides, it is very difficult to dispose the wastes of the mineral lubricant due to its nonbiodegradable nature. As the alternative solution, a comparative investigation of bio-lubricant formulated from waste cooking oil will be conduct. This thesisr outlines the tribological characteristics of waste cooking oil (WCO) contaminated bio-lubricant by using Four-ball tribo testing machines. To formulate the bio-lubricants, 10 to 40% by volume of waste cooking oil were blended with the base lubricant SAE 40. Experimental results showed that the lubrication regime that occurred during the test was boundary lubrication while the main wear mechanisms were abrasive and the adhesive wear. During four ball tribo testing, the lowest wear was found with the addition of 20% WCO, and above 20% contamination, the wear rate was increased considerably. The addition of waste cooking oil in the base lubricant acted as a very good lubricant additive which reduced the friction and wear scar diameter during the tribo test. The application of 20% bio-lubricant in the automotive engine will enhance the mechanical efficiency and take part to reduce the dependency on petroleum oil as well.Thus as an alternative lubricant source, waste cooking oil (WCO) can be played a vital role to substitute the petroleum.

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