Article In: orcid, scopus, cienciavitae
Biodiesel production from waste frying oils over lime catalysts
Reaction Kinetics, Mechanisms and Catalysis
2013 — SPRINGER
—Key information
Authors:
Published in
08/01/2013
Abstract
Biodiesel production from semi-refined oils (SRO) and waste frying oils (WFO) was studied using commercial CaO as heterogeneous catalyst. The methanolysis tests were carried out in mild reaction conditions (62 A degrees C, atmospheric pressure). With such conditions, SRO (soybean and rapeseed) allowed to produce a biodiesel containing 97-98 % of methyl esters (FAME), whereas WFO only provided 86-87 % of FAME. The lower FAME yield for WFO oil is ascribable to the partial neutralization of the catalyst by free fatty acids. Also, soaps formation from the WFO oil reduced the weight yield of the oil phase (containing FAME) obtained and increased the MONG content of the glycerin phase. The catalysts stability tests showed high stability even when WFO oil was processed. Catalytic tests performed with blends of WFO/semi-refined oils showed blending as a good strategy to process low value raw oils with minor decay of the catalyst performance. Both WFO and semi-refined oils showed S-shape kinetics curves thus discarding significant differences of the reaction mechanisms.
Publication details
Authors in the community:
João Fernando Pereira Gomes
ist123818
Jaime Filipe Borges Puna
ist164123
João Carlos Moura Bordado
ist11307
Publication version
AO - Author's Original
Publisher
SPRINGER
Title of the publication container
Reaction Kinetics, Mechanisms and Catalysis
First page or article number
405
Last page
413
Volume
109
Issue
2
ISSN
1878-5190
Fields of Science and Technology (FOS)
chemical-engineering - Chemical engineering
Publication language (ISO code)
eng - English
Alternative identifier (URI)
http://hdl.handle.net/10400.21/2840
Rights type:
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