Kinetic Study of Neem Biodiesel Production.
dc.contributor.author | Elkadi, M | |
dc.contributor.author | Pillay, A E | |
dc.contributor.author | Manuel, J | |
dc.contributor.author | Stephen, S | |
dc.contributor.author | Khan, M Z | |
dc.date.accessioned | 2015-08-26T09:50:14Z | |
dc.date.available | 2015-08-26T09:50:14Z | |
dc.date.issued | 2013-10 | |
dc.description.abstract | Aims: 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.citation | Elkadi 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.uri | https://imsear.searo.who.int/handle/123456789/162532 | |
dc.language.iso | en | en_US |
dc.source.uri | https://sciencedomain.org/abstract/1734 | en_US |
dc.subject | Neem biodiesel | en_US |
dc.subject | kinetics | en_US |
dc.subject | mechanistic features | en_US |
dc.subject | reaction order | en_US |
dc.subject | spectrophotometry | en_US |
dc.title | Kinetic Study of Neem Biodiesel Production. | en_US |
dc.type | Article | en_US |
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