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Storage and thermal stability of biodiesel produced from manketti nut oil of Southern Africa origin with the infuence of metal contaminants and antioxidants

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dc.contributor.author Kivevele, Thomas
dc.date.accessioned 2020-06-10T06:26:17Z
dc.date.available 2020-06-10T06:26:17Z
dc.date.issued 2020-04-20
dc.identifier.uri https://doi.org/10.1007/s42452-020-2743-y
dc.identifier.uri https://dspace.nm-aist.ac.tz/handle/123456789/772
dc.description This research article published by Springer Nature Switzerland AG., 2020 en_US
dc.description.abstract Biodiesel has widely been produced from common edible oils; however, food versus fuel conficts has motivated researchers to search for other less common feedstock for production of biodiesel. Thus, this study investigates the suitability of biodiesel made from less common manketti nut oil in terms of its thermal and long-term storage stability. Also, since biodiesel is stored in containers made of diferent metals; the infuence of metal contaminants on the storage stability of biodiesel is also examined. Manketti Oil Methyl Ester (MOME) is synthesized by the transesterifcation process and characterized as per biodiesel global standards. MOME is doped with antioxidants (1, 2, 3 tri-hydroxy benzene (Pyrogallol, PY) and 3, 4, 5-tri hydroxy benzoic acid (Propyl Gallate, PG)) at diferent ratio to analyse its infuence on the stability of MOME. Also, 2 ppm of selected metals (Co, Cu, Fe, Mn, and Ni) is doped to MOME samples with and without antioxidants and stored for 6 months in open and closed 500 ml plastic bottles. Oxidation stability is measured once a month to monitor stability of MOME. Thermogravimetric analysis is conducted to examine thermal stability of MOME. The results show that freshly-synthesized MOME has oxidation stability of 4.24 h below the European EN 14214 (8 h) and South African SANS 1935 (6 h) standards. On adding antioxidant PY and PG at 200 ppm concentration, the oxidation stability increases to 13 h and 8.5 h respectively. The result of MOME contaminated with metals shows that Cu has the highest damaging efects on oxidation stability during storage. Additionally, thermal stability analysis results exhibit that MOME has excellent thermal stability of 211.33 °C. en_US
dc.language.iso en en_US
dc.publisher Springer Nature Switzerland AG. en_US
dc.subject Manketti oil en_US
dc.subject Thermal stability en_US
dc.subject Oxidation stability en_US
dc.subject Metal contaminants en_US
dc.title Storage and thermal stability of biodiesel produced from manketti nut oil of Southern Africa origin with the infuence of metal contaminants and antioxidants en_US


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