Kinetic Study of Neem Biodiesel Production.

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dc.contributor.authorElkadi, M
dc.contributor.authorPillay, A E
dc.contributor.authorManuel, J
dc.contributor.authorStephen, S
dc.contributor.authorKhan, M Z
dc.date.accessioned2015-08-26T09:50:14Z
dc.date.available2015-08-26T09:50:14Z
dc.date.issued2013-10
dc.description.abstractAims: The kinetic features of neem biodiesel production were studied to establish the conversion parameters that govern optimal product yield in minimum reaction span. The mechanistic features of the dual acid/base catalytic conversion were investigated to gain an insight into the influence of methoxide nucleophilic attack and catalytic restoration on reaction yield in the final stage. Study Design: The reaction kinetics was investigated by UV-Vis absorption spectrophotometry. Neem biodiesel was extracted from neem oil via a two-stage chemical process. The neem oil feedstock is comparatively high in free fatty acids and its reduction is facilitated by an initial acid-catalysed pre-treatment. The second stage constitutes basecatalyzed transesterification to neem biodiesel and the glycerol by-product at 55ºC. The kinetic study focused on the second stage, which is underexplored with neem oil. Place and Duration of Study: Chemistry Department, Arts and Sciences, The Petroleum Institute, Abu Dhabi, UAE. Methodology: Suitable time intervals were selected to monitor the transesterification, and the absorbances of the resulting biodiesel were recorded in the far visible region at 700 nm (max.). Results: It was found that the base-catalyzed reaction is rapid (<300 s) at the stipulated temperature and reaches completion after significant conversion to the biodiesel product. Absorbances were recorded after 1-minute cooling in an ice-water bath. Graphical delineation of the results revealed that the transesterification step conforms to zero-order kinetics. The difficulty encountered in making measurements was the fluctuating absorbances due to the separation of the phases – the rising biodiesel and the sinking glycerol. Conclusion: The purpose of this study assists in defining the rate determining stage associated with the process. The biodiesel yield is 65% and inhibition of the reaction at lower temperatures or introduction of an inhibitor could be considered to prolong the final stage to acquire improved biodiesel yields.en_US
dc.identifier.citationElkadi M, Pillay A E, Manuel J, Stephen S, Khan M Z. Kinetic Study of Neem Biodiesel Production. British Biotechnology Journal. 2013 Oct; 3(4): 500-508.en_US
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/162532
dc.language.isoenen_US
dc.source.urihttps://sciencedomain.org/abstract/1734en_US
dc.subjectNeem biodieselen_US
dc.subjectkineticsen_US
dc.subjectmechanistic featuresen_US
dc.subjectreaction orderen_US
dc.subjectspectrophotometryen_US
dc.titleKinetic Study of Neem Biodiesel Production.en_US
dc.typeArticleen_US
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