Rheological and physicochemical analysis of non- edible oils used for biodiesel production

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dc.contributor.authorZakaria, Francisca
dc.date.accessioned2023-10-09T08:55:16Z
dc.date.available2023-10-09T08:55:16Z
dc.date.issued2023-07
dc.descriptionSDG 7 – Affordable and Clean Energy SDG 9 – Industry, Innovation, and Infrastructure SDG 12 – Responsible Consumption and Productionen_US
dc.description.abstractThe knowledge of the physicochemical and rheological flow characteristics of biodiesel feedstock is used for quality control in production, storage and transportation processes. Moreover, the knowledge is applied in redesigning and optimizing facilities that can be used for manufacturing, storage and transportation of the fuel. Non-edible oils analysed in the present study were Cashew Nut Shell Liquid (CNSL), Castor Oil (CO), croton megalocarpus oil (CMO), podocarpus usambarensis oil (PUO) and Thevetia peruviana oil (TPO). Free fatty acid, acid value, saponification value, peroxide value, iodine value, specific gravity and moisture content were determined by following the recommended Association of Official Analytical Chemists (AOAC) methods of analysing physicochemical characteristics. Physicochemical results show that all the selected non-edible vegetable oils with an exception of CNSL, do not require any further treatment. However, due to high Free Fatty Acid (FFA) content in CNSL, direct biodiesel production from the feedstock would be a challenge hence further treatment to reduce the acidity of the feedstock is essential. Rheological flow parameters were analysed using VT-550 Thermo Haake Viscotester monitored by a Rheowin Job manager. The pre-set parameters in the Viscotester were the shear rate and temperature. The shear rate was increased uniformly from 5 𝑠−1 –100 𝑠−1 in 60 seconds at 30-60˚C. Regardless of the analysis temperature, all oils exhibited Newtonian flow behavior, indicating that the viscosity of the oil remained uniform at a constant temperature. The experimental data were fitted into rheological models: Newton, Bingham, Oswald de Waele (power-law), and Herschel Bulkley using Rheowin data evaluation software. The results revealed that Newton and Oswald de Waele models were appropriate to represent the flow behaviour of the oils with the fit of R2 ≥0.990.en_US
dc.identifier.urihttps://doi.org/10.58694/20.500.12479/2136
dc.language.isoenen_US
dc.publisherNM-AISTen_US
dc.subjectResearch Subject Categories::NATURAL SCIENCESen_US
dc.titleRheological and physicochemical analysis of non- edible oils used for biodiesel productionen_US
dc.typeThesisen_US

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