The effect of process variables on the transesterification of refined cottonseed oil

Umaru Musa, A. A. Aboje, Ibrahim A. Mohammed, Aliyu Aliyu, M. M. Sadiq, Aminat O. Olaibi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Citations (Scopus)


This research work focuses on the production of biodiesel from refined cottonseed oil via alkaline-transesterification process using sodium hydroxide catalyst and methanol. Optimization was carried out using a 2 3factorial design experiment, three variables namely mole ratio of methanol to oil, catalyst concentration and reaction temperature were studied at both high and low levels. The results obtained during the characterization of refined cottonseed oil include; Saponification Value (189.0 mgKOH/g), Acid Value (1.02 mgKOH/g), Free Fatty Acid (0.51%), Iodine Value (111.2 g/100g), Specific Gravity (0.920), Refractive Index (1.468). These results show the suitability of the oil for the production of biodiesel. Production yield and purity of biodiesel were used to verify the optimization. Results obtained showed that mole ratio of methanol to oil and catalyst concentrations were the most important variables affecting the yield of biodiesel. Optimum methyl ester yield of 96.23% and a concentration of 99.54% were gotten at a temperature of 40 °C, mole ratio of methanol to oil of (6:1) and catalyst concentration of 0.5 wt% at a constant reaction time of 90 minutes.

Original languageEnglish
Title of host publicationWorld Congress on Engineering, WCE 2014
EditorsS. I. Ao, Len Gelman, David Hukins, Andrew Hunter, A. M. Korsunsky
PublisherNewswood Limited
Number of pages3
ISBN (Print)9789881925275
Publication statusPublished - 4 Jul 2014
Externally publishedYes
EventWorld Congress on Engineering - London, United Kingdom
Duration: 2 Jul 20144 Jul 2014

Publication series

NameLecture Notes in Engineering and Computer Science
ISSN (Print)2078-0958


ConferenceWorld Congress on Engineering
Abbreviated titleWCE 2014
Country/TerritoryUnited Kingdom


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