Production and Characterization of Biodiesel from seed oil of Castor (Ricinus communis L.) plants

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Author(s) Awab W. AL-Harbawy | Mozahim K. AL-Mallah
Pages 508-513
Volume 3
Issue 9
Date September, 2014
Keywords biodiesel; extraction; crude oil; methanolysis; moisture; saponification; kinematic viscosity
Abstract

The investigation describe the hot and cold extraction methods used to produce oil from seeds of wild castor (Ricinus communis L.) plants. Cold extracted crude oil obtained by hydraulic press machine and refined by physicochemical techniques. Refined oil measurements were carried out according to the same parameters of crude oil. Physicochemical characters values of oil were : pH 6.7, moisture content 4.2%, glycerol wt. 5.3%, oil yield 47.6%, specific gravity 0.959, refractive index 1.477, acid value 3.12 mg KOH/g, iodine value 74.08 g I2/100g, saponification value 181.52 mg KOH/g, kinematic viscosity 238 mm2/s and free fatty acids 1.56%. The data of hot extracted oil showed that these values were around the standard properties values of castor oil, while cold method oil was around some values and out of ranges in others. Interestingly, methanolysis was suitable to produce biodiesel from oils extracted either by cold or hot method. Evaluation of biodiesel exhibit superior properties of that produced by hot method. Some properties of cold extracted oil were similar to the standards and not in others.

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