Evaluation of the Optimal Reaction Conditions for the Methanolysis and Ethanolysis of Castor Oil Catalyzed by Immobilized Enzymes

Thalles Allan Andrade, Ibrahim F. Al-Kabalawi, Massimiliano Errico, Knud Villy Christensen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

As an alternative to the use of chemical catalysts, immobilized enzyme Lipozyme 435 was evaluated as catalyst for biodiesel production, comparing its efficiency in the castor oil transesterification with methanol and ethanol. Different reaction conditions were assessed and optimized, including the reaction temperature (35 – 60 °C), alcohol-to-oil molar ratio (from 3:1 to 6:1), amount of catalyst (from 3 to 15 wt% by weight of oil), addition of water (0 – 15 wt%), and use of n-hexane as a solvent (0 – 75 wt%). For the transesterification with methanol, the optimal reaction conditions were 3:1 methanol-to-oil molar ratio, 5 wt% of enzymes, 7.5 wt% of water, 50 wt% n-hexane, at 50 °C. The fatty acid methyl esters content was 96.8 % and 1.0 % FFA. Regarding the reactions with ethanol, 98.0 % fatty acid ethyl ester was obtained and 1.3 % FFA, when the reaction was carried out at 60 °C, 4:1 ethanol-to-oil molar ratio, 5 wt% of enzymes, 40 wt% of n-hexane and no addition of water.
Original languageEnglish
Title of host publicationEuropean Biomass Conference and Exhibition Proceedings 2018
PublisherETA-Florence Renewable Energies
Publication date7. Jun 2018
Pages1044-1050
ISBN (Electronic)978-88-89407-18-9
DOIs
Publication statusPublished - 7. Jun 2018
EventEuropean Biomass Conference & Exhibition - København, Denmark
Duration: 14. May 201817. May 2018
Conference number: 26
http://www.eubce.com/home.html

Conference

ConferenceEuropean Biomass Conference & Exhibition
Number26
CountryDenmark
CityKøbenhavn
Period14/05/201817/05/2018
Internet address
SeriesEuropean Biomass Conference and Exhibition
Volume26
ISSN2282-5819

Keywords

  • biodiesel
  • enzymatic process
  • castor oil
  • transesterification

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