In-Situ Trans-esterification of Cottonseeds Oil (Gossypium Spp) Using CaO Derived from Egg Shell as Catalyst

Authors: Sani AM, Muhammad LA*, Mukhtar M, Bello SA, Galadima A and Bagudo AM

DOI: 10.23880/psbj-16000109

Volume 2, Issue 1

Abstract

In-situ trans-esterification of cottonseed oil (Gossypium spp) was carried out with 5g calcium oxide derived from egg shell
as catalyst using soxhlet extraction apparatus and 1:1 of n-hexane to methanol. All the trans-esterification reactions were
carried out at 600C temperature for 2 hours. The results produced a biodiesel with 35.75% yield, water and sediment
content 0.08%, density 0.85g/cm3, specific gravity 0.85, saponification value 16.83mgKOH/g, acid value 0.79mgKOH/g,
iodine value 59.22I2/100g, cetane number 357.28, and high heating value 47.85MJ/kg. The GC/MS results indicated the
presence of tetradecanoic acid, methyl ester, hexadecanoic acid, methyl ester, 11-octadecenoic acid, methyl ester, 6-
octadecenoic acid, (z)-methyl ester, octadecanoic acid, methyl ester, n-hexadecanoic acid, oleic acid and 2-ethyl-2-
hexanal. Thus, the processing of cottonseed oil into methyl ester using soxhlet extraction method is recommended as it
required low energy input as compare to conventional method.

Keywords:

Trans-esterification; Biodiesel; Cotton seed; Gas Chromatography/Mass Spectroscopy; Eggshell

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