Volume No. 5 Issue No.: 3A Page No.: 689-695 January-March 2011

 

KINETIC STUDIES OF HETEROGENEOUSLY CATALYZED TRANSESTERIFICATION OF COTTONSEED OIL TO BIODIESEL

 

N. Jaya*1 and K. Ethirajulu2

1. Department of Petrochemical Technology, Anna University of Technology, Tiruchirappalli (INDIA)
2. Krishnasamy College of Engineering and Technology, Cuddalore (INDIA)

 

Received on : October 13, 2010

 

ABSTRACT

 

The main thrust of this work is to study the kinetics of ion-exchanged catalyzed transesterification of cottonseed oil. Transesterification of cottonseed oil with methanol was carried out at different temperatures in the presence of cation exchange resin and characterization of oil and products. The effects of the molar ratio of methanol to oil, reaction temperature, reaction time, mass ratio of catalyst to oil and stirring rates were studied to optimize the reaction conditions. The experimental results showed that the optimum conditions were 6:1 molar ratio of methanol to oil, 1.5 wt % cation exchange resin catalyst, at reaction temperature of 338 K with a stirring rate of 10 Hz and reaction time of 3 h. The fatty acid methyl ester (Biodiesel) contents were higher than 80 %. We have found that the activation energy of resin catalyzed transesterification of cottonseed oil is 22090.30 J/mol. It was also indicated that the catalysis performance of ion-exchange resins were better than that of homogeneous catalysts. The spent catalysts can be easily regenerated and the same activity can be retained. A few fuel properties were also measured for biodiesel to observe its competitiveness with conventional diesel fuel.

 

Keywords : Heterogeneous catalysis, Ion-exchange resins, Reaction kinetics, Transesterification, Biodiesel

 

 

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