Abstract Enzymatic transesterification of palm oil with methanol and ethanol was studied. Of the four lipases that were. Tested in the initial screening lipase Candida, Rugosa (CR) resulted in the highest yield of mono alkyl esters. Lipase CR. Was further investigated in immobilized form within an activated carbon as support. The activated carbon was prepared by. Activation physical. Using the immobilized lipase CR the effects, of water and, alcohol concentration enzyme loading and. Enzyme thermal stability in the transesterification reaction were investigated. The optimal conditions for processing 50 g. Of palm oil were: 37, C 1: 14.5 oil / methanol molar ratio 1.0 g, water and 500 mg lipase for the reactions with methanol 35 C,,, 1: 15.0 oil / ethanol molar ratio 1.0 g,,Water 500 mg, lipase for the reactions with ethanol and, 35, C 1: 10.0 oil / n-butanol, molar ratio1.0 g water 500 mg, lipase for the reactions with ethanol. Subject to the, optimal conditions methyl.And ethyl esters formation of 70 and 85 mol% in 1 h of reaction were obtained for the immobilized.Enzyme reactions. The flow microcalorimetry is an important and novel techniques is used in eval -.Uation of biodiesel production.
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