INVESTIGADORES
QUERINI carlos Alberto
artículos
Título:
Ethyl ester production by homogeneous alkaline transesterification: Influence
Autor/es:
MENDOW, G.; VEIZAGA, N.S.; QUERINI, C.A.
Revista:
BIORESOURCE TECHNOLOGY
Editorial:
ELSEVIER SCI LTD
Referencias:
Lugar: Amsterdam; Año: 2011 vol. 102 p. 6385 - 6391
ISSN:
0960-8524
Resumen:
In this work, the process for ethyl ester production is studied using refined sunflower oil, and NaOH, KOH,
CH3ONa, and CH3OK, as catalysts. In all cases, the reaction is carried out in a single reaction step. The best
conversion is obtained when the catalyst is either sodium methoxide or potassium methoxide. We found
that during the transesterification with ethanol, soap formation is more important than in the case of
methanol. The saponification reaction consumes an important fraction of the catalyst. The amount of catalyst
consumed by this reaction is 100% in the case of using hydroxides as catalyst (KOH or NaOH), and
25%, and 28% when using CH3ONa and CH3OK as catalysts, respectively. Ethanol increases the catalyst solubility
in the oil?ethyl ester phase, thus accelerating the saponification reaction.
It is possible to obtain high conversions in a one-step reaction, with a total glycerine concentration
close to 0.25%.3ONa, and CH3OK, as catalysts. In all cases, the reaction is carried out in a single reaction step. The best
conversion is obtained when the catalyst is either sodium methoxide or potassium methoxide. We found
that during the transesterification with ethanol, soap formation is more important than in the case of
methanol. The saponification reaction consumes an important fraction of the catalyst. The amount of catalyst
consumed by this reaction is 100% in the case of using hydroxides as catalyst (KOH or NaOH), and
25%, and 28% when using CH3ONa and CH3OK as catalysts, respectively. Ethanol increases the catalyst solubility
in the oil?ethyl ester phase, thus accelerating the saponification reaction.
It is possible to obtain high conversions in a one-step reaction, with a total glycerine concentration
close to 0.25%.3ONa and CH3OK as catalysts, respectively. Ethanol increases the catalyst solubility
in the oil?ethyl ester phase, thus accelerating the saponification reaction.
It is possible to obtain high conversions in a one-step reaction, with a total glycerine concentration
close to 0.25%.