Biodiesel Production Process from Waste Vegetable Oil and Optimization of its Physical Properties

Subject Areas : environmental management

Mahdy Turkish Boldaji ¹ ( Young Researchers Club, Islamic Azad University of Varamin an example, Varamin, Iran(Corresponding Author ) )
Bahman Najafi ² ( Assistant Professor, Varamin Islamic Azad University, Department of Mechanic and Agricultural Machinery engineering, University of Mohagegh Ardebili )
Amir hossein Zamzamiyan ³ ( Assistant Professor, Faculty of Chemistry, Institute of Material and Energy )
Reza Ebrahimzadeh ⁴ ( Varamin Islamic Azad University, Faculty ofAgricualture )

Received: 2008-10-31 Accepted : 2009-02-05 Published : 2012-06-21

Keywords: Biodiesel, Waste Cooking Oil, Trans Esterification, Physical Properties,

Abstract :

Biodiesel is Alkyl Ester of fatty Acids that is produced from vegetable oils or animal fats. Biodiesel compared with diesel fbel contains less sulftir and aromatic compounds, and includes 10% oxygen in its molecular construction which results decreasing in exhaust emission pollutants of diesel engine. In this research biodiesel is produced from waste cooking oil by means ofTrans Esterification method in the presence ofNaOH catalyzes (0.5 % oil weight) and 6:1 of methanoi to oil ratio. For improving some physical properties of biodiesel, such as cloud point and pour point crystallization of ester with n-hexane solvent was used. Some blends with different levels of biodiesel and diesel fuel were obtained from each kind of blend fuel. Physical properties identified and compared to diesel fuel #2. Conclusions show: increasing of biodiesel percent in blend resulted increasing of density and viscosity. High percent of biodiesel in blends, has negative effect on cloud point and pour point, and so compared with diesel fuel, causes increasing these two properties.