Journal
ENERGY & FUELS
Volume 30, Issue 6, Pages 4820-4824Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.energyfuels.6b00208
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Funding
- State of Sao Paulo Research Foundation (FAPESP)
- FAPESP [2011/00743-8]
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In this work was produced an immobilized biocatalyst from Cercospora kikuchii lipase with beneficial catalytic activity and stability. The immobilized derivative was used in the ethanolysis of coconut oil. This is a great option for the Brazilian renewable fuel production, because both coconut oil and ethanol are promptly available in the country, at a reasonably low cost. For this, lipase was immobilized on rice husk (5.5 mg(protein) g(support)(-1)) by covalent binding using spouted bed drying (gas flow rate, 0.66 m(3) min(-1); temperature, 100 degrees C; and solution flow rate, 5.5 g min(-1)). In a typical batch run, the immobilized derivative was added at a vegetable oil/ethanol molar ratio of 1:12 using tert-butanol as the solvent. The feasibility of immobilization and drying processes was demonstrated toward biodiesel production, attaining a high ester content (97.1%) and low levels of acylglycerides (0.9%) after 72 h. Further properties, such as viscosity (4.56 mm cm(-2)) and density (888 kg m(-3)), are in agreement with specifications required by the ASTM D6751 to be used as alternative biofuel.
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