Optimisation of Bio-Diesel made from Non-Edible Avocado Seed Oil (ASO) Using Homogenous H2SO4/KOH Catalyst

Gidigbi, Joshua A; Abubakar, Abdulrasaq Banaru

doi:10.22034/ijnc.2023.1995852.1327

Optimisation of Bio-Diesel made from Non-Edible Avocado Seed Oil (ASO) Using Homogenous H2SO4/KOH Catalyst

Document Type : Research Paper

Authors

Joshua A Gidigbi ¹

Abdulrasaq Banaru Abubakar ²

¹ Modibbo Adama University

² Science Laboratory Department, Federal College of Horticulture, Dadinkowa

https://doi.org/10.22034/ijnc.2023.1995852.1327

Abstract

Bio-diesel has proven to be a better alternative to fossil diesel due to its eco-friendly, ease of production, high cetane rating and sustainability (renewable) which are the major drawback of fossil fuel. In this study, a non-edible avocado seed oil was used to formulate biodiesel. The avocado seed oil was extracted using cold press mill. The seed oil was then subjected to esterification to reduce the acidic value to <1mgKOH/g using sulphuric acid catalyst (H2SO4). Subsequently, the optimisation of the transesterification process was carried out by investigating the effect of different blend of molarity of oil to methanol (1: 6, 1.5:6, 2: 5, and 2.5:4.5) concentration of KOH catalyst % weight (0.5, 1, 1.5 and 2), reaction time in minutes (55, 65, 75, and 85) and reaction temperature (55,60,65 and 70) OC on the yield of ASO biodiesel (%). The study revealed that highest ASO biodiesel yield (%) was observed with KOH 1% weight concentration; 75 min reaction time, 650C and 1: 6 molarity of oil to methanol. The physico-chemical parameters of ASO biodiesel assessed were in conformity with ASTM standard and with literature. The assessment revealed that ASO biodiesel has some improved properties over fossil diesel. Therefore, it can be used solely or as a blend in diesel engine.

Keywords

ASTM

esterification

transesterification

biofuel

sustainability

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