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RevistaRenewable Energy
Año2019
Volumen135
Páginas1-9
Internacional

Comparison of acid, basic and enzymatic catalysis on the production of biodiesel after RSM optimization

Autores:Roberto Fernandez-Lafuente
Grupos de investigación:Optimización de biocatalizadores y bioprocesos enzimáticos
Veymar G. Tacias-Pascacioa, Beatriz Torrestiana-Sáncheza, Lucas Dal Magrob, Jose J. Virgen-Ortízc,
Francisco J. Suárez-Ruízd, Rafael C. Rodriguesb, ∗∗, Roberto Fernandez-Lafuentee, ∗
a Unidad de Investigación y Desarrollo en Alimentos, Instituto Tecnológico de Veracruz, Calzada Miguel A. de Quevedo 2779, 91897, Veracruz, Mexico
b Biocatalysis and Enzyme Technology Lab, Institute of Food Science and Technology, Federal University of Rio Grande do Sul, Av. Bento Gonçalves, 9500, P.O. Box 15090, Porto
Alegre, RS, Brazil
c CONACYT - Centro de Investigación en Alimentación y Desarrollo, A.C. (CIAD) - Consorcio CIDAM, Km. 8 Antigua Carretera a Pátzcuaro s/n, 58341, Morelia, Michoacán,
Mexico
d Instituto Tecnológico de Tuxtla Gutiérrez, Carr. Panamericana Km. 1080, 29050, Tuxtla Gutiérrez, Chiapas, Mexico
e Instituto de Catálisis y Petroleoquímica - CSIC, Cantoblanco, Marie Curie 2, 28049, Madrid, Spain
 
 
This paper shows the direct comparison of 4 different catalysts (homogenous alkaline (KOH), heterogeneous
alkaline (CaO), homogenous acid (H2SO4) and a new biocatalyst (lipase from Thermomyces lanuginosus
(TLL) immobilized on octadecyl methacylate)) in the production of biodiesel from cooking oils. The reactions
for each catalyst were optimized using response surface statistical methodology, considering as main parameters:
substrates molar ratio, percentage of catalyst and reaction time, whereas for enzymatic catalysis instead
reaction time, we studied water concentration. Alkaline homogenous catalysis was found to be the most effective,
as expected from literature. However, for first time, the new biocatalyst from TLL is just around one
order of magnitude under the homogenous catalysis in reaction rate and surpassed the heterogeneous catalysis
or the acid catalysis (similar yields in 2 h versus the 1 h of the alkaline catalyst). Moreover, the reaction
product using the biocatalytic approach was much cleaner and less energy demanding than the other catalytic
approaches. From our view, this is the first report where biocatalysis is close to conventional catalysis in the
production of biodiesel.

Palabras clave:biodiesel, response surface methodology, Used cooking oils, Optimization of the biocatalysts, Alkaline catalysis. Acid catalysis
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