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OXIDATIVE STABILITY AND COLD FILTER PLUGGING POINT OF BIODIESEL BLENDS DERIVED FROM FATS AND SOY OIL

Authors :
João V. Braun
Samuel J. Santos
Guilherme C. Espíndola
Gabriel F. de Mattos
Diego P. Ongaratto
Diogo M. de Oliveira
Marlon W. da Silva
Vinícius Vendrusculo
Vinícius O. B. dos Santos
Rodrigo E. Renner
Fabrício F. Naciuk
Marcelo V. Marques
Luiz A. M. Fontoura
Source :
Química Nova, Vol 43, Iss 9, Pp 1246-1250 (2020)
Publication Year :
2020
Publisher :
Sociedade Brasileira de Química, 2020.

Abstract

Biodiesel made from oils is rich in polyunsaturated fatty acids methyl esters, and, consequently, presents high tendency to oxidize. Biodiesel made from fats, on the other hand, is mainly comprised by saturated chains. Although it is highly stable, they easily crystalize at low temperatures. Blends from both can exhibit optimized properties. In this work, oxidative stability, expressed by induction period (IP), and cold filter plugging point (CFPP) of blends from palm, palm kernel, babassu, tallow or lard biodiesels with soy one were measured. Biodiesel samples were prepared by two steps transesterification methodology with KOH catalysis followed by H2SO4. IP increases, as the fat biodiesel content in the blend is higher, as expected. Blends comprised by 60% of fat biodiesel by volume had their IP increased from 1.5 (lard) to 2 times (palm kernel), compared to soy one. At this level, IP was found 8 h or higher, except for palm, which 80% was required. CFPP was observed at 8 °C or lower for the blends containing up to 60% of all the fat biodiesel, except for the palm one, which a 20% content must not be surpassed. Palm kernel 80% biodiesel blend reached the Brazilian specification, that is, IP higher than 12 h and CFPP lower than 5 °C.

Details

Language :
English, Spanish; Castilian, Portuguese
ISSN :
16787064 and 01004042
Volume :
43
Issue :
9
Database :
Directory of Open Access Journals
Journal :
Química Nova
Publication Type :
Academic Journal
Accession number :
edsdoj.41d3e9b8fd4d4444b77b66530ef00543
Document Type :
article
Full Text :
https://doi.org/10.21577/0100-4042.20170619