Artigo de Periódico
Transesterification of waste frying oil using a zinc aluminate catalyst
Fecha
2013Registro en:
0378-3820
v. 106
Autor
Alves, C. T.
Oliveira, A.
Carneiro, S. A. V.
Silva, A. G.
Andrade, Heloysa Martins Carvalho
Melo, Silvio Alexandre Beisl Vieira de
Torres, Ednildo Andrade
Alves, C. T.
Oliveira, A.
Carneiro, S. A. V.
Silva, A. G.
Andrade, Heloysa Martins Carvalho
Melo, Silvio Alexandre Beisl Vieira de
Torres, Ednildo Andrade
Institución
Resumen
The transesterification of waste frying oil (WFO) with methanol and ethanol was studied in a batch reactor
using a zinc aluminate catalyst prepared by the combustion reaction method. The reaction runs were carried
out for 2 hours, using alcohol:oil molar ratio of 40:1, temperature range of 60–200 °C, catalyst ratio of 1–10%
wt., under 700 rpm stirring. The catalyst was characterized by XRD, EDX, TG, FTIR, N2 physisorption, NH3-
and CO2-TPD. The catalyst showed a normal spinel structure and acid character (Lewis acid), in spite of the
presence of both strong acid and base sites. Methyl and ethyl esters yields higher than 95% were obtained
at 150 and 200 °C and the catalyst was recovered and reused in 3 reaction cycles, without significant loss
of activity.