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International Journal of Engineering Research and Technology. ISSN 0974-3154 Volume 6, Number 3 (2013), pp. 291-306

© International Research Publication House

Biodiesel Production of Waste Cooking Oil through Ultrasound Cavitation

Amit Pala and Surendra Singh Kachhwahab

aDepartment of Mechanical Engineering,

Delhi Technological University, Delhi, 110042. bDept. of Mechanical Engineering, School of Technology, PDPU, Gandhi Nagar, India.


This paper presents the comparative details of biodiesel production process using low frequency ultrasonic energy (28-33 kHz) and conventional mechanical stirrer method. For this purpose, Waste Cooking Oil (WCO) is used as the biodiesel feedstock. The experiments have been performed for molar ratio (alcohol/oil) 6:1 and 4.5:1, with three different catalyst percentages (0.5%, 0.75% and 1%) of Potassium Hydroxide. The important chemical and physical properties of Waste Cooking Oil biodiesel were determined and compared with diesel. It is observed that the density and viscosity values of the biodiesels produces are within the permissible limits but still higher than petroleum diesel. Further an experimental investigation has been carried out on a four cylinder, diesel engine operating on diesel and biodiesel blends [B10, B20, and B30]. It can be concluded from present study that: (i) Biodiesel production through ultrasound energy seems to be a relatively simple, efficient, time saving, eco-friendly and industrially viable process. (ii) The trends for percentage variations of performance parameters for biodiesel blends (in reference to diesel as baseline) do not show any deterioration.(iii) There is tremendous improvement in smoke reduction while operating with biodiesel as compared to petroleum diesel.

Keywords: Biodiesel; Ultrasonic energy; Waste Cooking oil; Performance tests; Engine emissions.

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