Kumar, Rajnish and Madras, Giridhar and Modak, Jayant (2004) Enzymatic Synthesis of Ethyl Palmitate in Supercritical Carbon Dioxide. In: Industrial & Engineering Chemistry Research, 43 (7). pp. 1568-1573.
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The esterification of palmitic acid with ethanol was investigated at various temperatures (35- 70 °C) in the presence of three lipases (Novozym 435, Lipolase 100T, and hog pancreas lipase) in supercritical carbon dioxide $(SCCO_2)$ and under solvent-free conditions. All enzymes showed an optimum temperature of 55 °C under both conditions. The effect of water and ethanol addition on the esterification of acid was also investigated. The conversion obtained in $SCCO_2$ and under solvent-free conditions with Novozym at optimal conditions was 74 and 97%, respectively. Although a higher apparent yield was obtained under the solvent-free conditions due to higher substrate and enzyme concentrations, the reaction in supercritical carbon dioxide is better because of lower enzyme loading, higher reaction rates and easier downstream processing.
|Item Type:||Journal Article|
|Additional Information:||The copyright belongs to American Chemical Society.|
|Department/Centre:||Division of Mechanical Sciences > Chemical Engineering|
|Date Deposited:||27 May 2006|
|Last Modified:||19 Sep 2010 04:27|
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