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Research Article Open access CC BY 3.0

Kinetic Study of Neem Biodiesel Production

M. Elkadi, A. E. Pillay, J. Manuel, S. Stephen, M. Z. Khan

Biotechnology Journal International · pp. 500–508 · Published 24 Jul 2013

10.9734/BBJ/2013/4434

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 base-catalyzed 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 (lmax.). 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.

Neem biodiesel kinetics mechanistic features reaction order spectrophotometry

References (24)

  1. 1 Variables affecting the yields of fatty esters from transesterified vegetable oils [DOI]
  2. 2 Biodiesel production through the use of different sources and characterization of oils and their esters as the substitute of diesel: A review [DOI]
  3. 3 Transesterification of vegetable oils: a review [DOI]
  4. 4 Energy Sources, Part A: Recovery, Utilization, and Environmental Effects
  5. 5 Effects of biodiesel on a DI diesel engine performance, emission and combustion characteristics [DOI]
  6. 6 Recent developments on heterogeneous catalysts for biodiesel production by oil esterification and transesterification reactions: A review [DOI]
  7. 7 Combustion and performance evaluation of a diesel engine fueled with biodiesel produced from soybean crude oil [DOI]
  8. 8 Engine performance and exhaust gas emissions of methanol and ethanol–diesel blends [DOI]
  9. 9 Biodiesel from palmoil—an analysis of its properties and potential [DOI]
  10. 10 Fuel Properties of Eleven Vegetable Oils [DOI]
  11. 11 Preparation of Ester Derivatives of fatty acids for chromatographic analysis
  12. 12 Performance and emission analysis of cottonseed oil methyl ester in a diesel engine [DOI]
  13. 13 Darstellung der Ester [DOI]
  14. 14 Experimental study of the effects of vegetable oil methyl ester on DI diesel engine performance characteristics and pollutant emissions [DOI]
  15. 15 Activity of homogeneous and heterogeneous catalysts, spectroscopic and chromatographic characterization of biodiesel: A review [DOI]
  16. 16 Performance and emission analysis of Cottonseed oil methyl ester in a diesel engine [DOI]
  17. 17 Determination of performance and combustion characteristics of a diesel engine fueled with canola and waste palm oil methyl esters [DOI]
  18. 18 A study on emission performance of a diesel engine fueled with five typical methyl ester biodiesels [DOI]
  19. 19 Engine performance and emission characteristics of marine fish-oil biodiesel produced from the discarded parts of marine fish [DOI]
  20. 20 Comparison of performance and emissions of diesel fuel, rapeseed and soybean oil methyl esters injected at different pressures [DOI]
  21. 21 Recent developments in methods for the esterification and protection of the carboxyl group [DOI]
  22. 22 Synthesis of biodiesel from Neem oil using sulfated zirconia via tranesterification [DOI]
  23. 23 A comparison of trace metal profiles of neem biodiesel and commercial biofuels using high performance ICP-MS [DOI]
  24. 24 Prospects and Potential of Non Edible Neem Oil Biodiesel Based on Physico-chemical Characterization [DOI]

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