Screening of blending Jatropha Curcass oil with waste cooking oil as bio-Iubricant precursor

Abstract

The vegetable oil such as Jatropha CUTCas oil with high oleic acid (monounsaturated fatty acid) content has been demanded as an alternative for mineral oil-based lubricant due to price fluctuation of petroleum feed stock and high concern of people about pollution free environment. The study was investigated to screen the blending process of Jatropha CUTCas oil and waste cooking oil as bio-Iubricant base stock. Soxblet extraction was used to extract: Jatropha CUTcas oil for 6 homs with different solvent. Hexane gives the best yield of oil which is 62.3 %. The chemical test include saponification, iodine, peroxide and acid value which results in 265.32 mglg, 98.136 IzIlOOg, 32.55 meq/kg, 3.74 mg/KOH for lCO and 191.22 mg/g, 21.714 Iz/l00g, 54.05 meqlkg, 0.34 mg/KOH for waste cooking oil respectively. For blending oil with the highest oleic content, the results for chemical test are 3.06 mg/g, 170.17 1z1l00g, 2.50 meqlkg, and 51.45 mgIKOH. Gas Chromatography (GC) and Fourier Transform Infm-Red (FTlR) revealed that the dominant fatty acid in lCO, WCO and new oil blends are palmitic acid, oleic acid and linoleic acid. Two level factorial designs were used as screening method to obtain result from lCO-WCO blending process. The parameters involved were waste cooking oil molar ratio, speed of stirrer and duration of blending. The study publicized the significant parameters of blending process which were WCO molar ratio and speed of stirrer give significant effect to the pereentage of oleic acid content in new blending oil. The highest percentage of oleic acid was found to be 53.31 %. This research exposed the potential of new blending oil which are comparable with other vegetable and mineral oils as base stock for bio-Iubricant in term of fatty acid compositions and other physical and chemical characterizations.