Synthesis of biodiesel from high FFA alperujo oil catalysed by immobilised lipase
Bonet Ragel, Kírian (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química)
Canet, Albert (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química)
Benaiges, M. Dolors (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química)
Valero Barranco, Francisco (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química)

Date:	2015
Abstract:	Synthesis of biodiesel was carried out through enzymatic biocatalysis by the transesterification of natural waste olive oil (alperujo oil) using a recombinant 1,3-positional selective Rhizopus oryzae lipase (rROL). The most relevant property of this uncommon substrate is the high content of free fatty acids (FFAs), making it impossible to produce biodiesel through basic catalysis. The synthesis reactions were carried out in a solvent-free media using a covalent immobilisation on a glutaraldehyde-treated polymethacrylate amino-epoxide carrier. Methanol was added by stepwise addition to avoid lipase inactivation. FFAs effects on the kinetics, yields and stability of biocatalysts were studied. It was concluded that the high free fatty acids content allows an increasing on the initial reaction rate and it gives more stability to the immobilised enzyme, demonstrating the efficiency of this new substrate for the biodiesel production.
Grants:	Ministerio de Economía y Competitividad CTQ2013-42391-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-452
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Alperujo oil ; Biodiesel synthesis ; Free fatty acids effect ; Rhizopus oryzae lipase
Published in:	Fuel, Vol. 161 (December 2015) , p. 12-17, ISSN 1873-7153

DOI: 10.1016/j.fuel.2015.08.032

Postprint 23 p, 1.0 MB

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