Catalytic effect of free fatty acids on cotton seed oil thermal transesterification

Pasias, SA; Barakos, NK; Papayannakos, NG

dc.contributor.author	Pasias, SA	en
dc.contributor.author	Barakos, NK	en
dc.contributor.author	Papayannakos, NG	en
dc.date.accessioned	2014-03-01T01:29:58Z
dc.date.available	2014-03-01T01:29:58Z
dc.date.issued	2009	en
dc.identifier.issn	0888-5885	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19419
dc.subject	Free Fatty Acid	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	Catalytic effects	en
dc.subject.other	Catalytic transesterification	en
dc.subject.other	Conversion reactions	en
dc.subject.other	Diglycerides	en
dc.subject.other	Esterification reactions	en
dc.subject.other	Free fatty acid	en
dc.subject.other	Kinetic models	en
dc.subject.other	Methanolysis	en
dc.subject.other	Molar ratio	en
dc.subject.other	Monoglycerides	en
dc.subject.other	Seed oil	en
dc.subject.other	Solid catalysts	en
dc.subject.other	Temperature range	en
dc.subject.other	Thermal conversion	en
dc.subject.other	Transesterification reaction	en
dc.subject.other	Acids	en
dc.subject.other	Batch reactors	en
dc.subject.other	Cotton	en
dc.subject.other	Cottonseed oil	en
dc.subject.other	Esters	en
dc.subject.other	Fatty acids	en
dc.subject.other	Methanol	en
dc.subject.other	Oils and fats	en
dc.subject.other	Petroleum refining	en
dc.subject.other	Reaction rates	en
dc.subject.other	Transesterification	en
dc.subject.other	Esterification	en
dc.title	Catalytic effect of free fatty acids on cotton seed oil thermal transesterification	en
heal.type	journalArticle	en
heal.identifier.primary	10.1021/ie801365k	en
heal.identifier.secondary	http://dx.doi.org/10.1021/ie801365k	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	The thermal transesterification of cottonseed oil with methanol has been investigated. Refined as well as cotton seed oil containing 9.8 wt. % free fatty acids (FFAs) were used. The impact of the free fatty acids present in the oil on the transesterification reaction rates has been studied. Free fatty acids were esterified in parallel with triglycerides (TGs) methanolysis reactions but their presence was beneficial for transesterification reactions as they appeared to have a catalytic effect on the monoglycerides (MGs), diglycerides (DGs), and triglycerides conversion reactions. Experiments were performed in a batch reactor in the temperature range of 170-220 °C and using a 6:1 methanol to oil molar ratio. A kinetic model describing the thermal transesterification and esterification reaction as well as the catalytic transesterification reactions by the FFAs is presented. The proposed kinetics might also be used in transesterification processes using solid catalysts in the same temperature range to estimate the net catalytic effects unmasked from thermal conversion. © 2009 American Chemical Society.	en
heal.publisher	AMER CHEMICAL SOC	en
heal.journalName	Industrial and Engineering Chemistry Research	en
dc.identifier.doi	10.1021/ie801365k	en
dc.identifier.isi	ISI:000265781200010	en
dc.identifier.volume	48	en
dc.identifier.issue	9	en
dc.identifier.spage	4266	en
dc.identifier.epage	4273	en