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Research Article Open access CC BY 4.0

Thermodynamic Studies on BInary Blends of Palm and Melon Oils in Production of Biodiesel

Kalu Samuel Anthonio, Ibezim-Ezeani Millicent Uzoamaka, Monago Kenneth Osondu, Njoku Chika Mercy

International Research Journal of Pure and Applied Chemistry · pp. 9–19 · Published 25 May 2023

10.9734/irjpac/2023/v24i3811

Abstract

Environmental pollutions, energy problems and other uncertainties associated with the use of fossil fuel are some reasons which constitute the quest for eco-compatible fuel substitutes. Vegetable oils (VOs) are known raw materials that will remedy the situation. Palm oil (PO) and melon oil (MO) were extracted and blended in various proportions PO:MO (0:100, 10:90, 30:70, 40:60, 50:50, 60:40, 80:20, 100:0) for biodiesel (BDS) production through the process of trans esterification using a catalyst (sodium hydroxide, NaOH). Viscosities of the blends decrease as temperature increases. Experimental information was applied to Grunberg-Nissan (d-)parameter; the range of PO50: MO50 blend (-10.629 to -8.030) showed the least negative d-parameter values at all temperatures (283K to 323K) and viscosity deviations at various temperatures range between -20 to 21. Thermodynamic studies were carried out on the blends; the randomness of the system and negligible effect of inter- and intra- bonding energies of the system were defined by the increasing negative values of Gibbs free energy of mixing (ΔGM) and zero enthalpies of mixing (ΔHM = 0). Energies of the produced BDS increase as calorific values of the blends increase (36 - 49 MJ/k) with an increase in the fractions of MO, and cloud point ranges from -1 to 0oC. The biodiesel properties were found to be comparable to the American Society for Testing and Material (ASTM) standard.

Biodiesel palm oil melon oil blends

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