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BIBTEX RIS

Supercritical CO2 extraction and transesterification of the residual oil from industrial palm kernel cake with supercritical methanol

2018; Elsevier BV; Volume: 147; Linguagem: Inglês

10.1016/j.supflu.2018.10.012

1872-8162

Wanessa Almeida da Costa, Fernanda Wariss Figueiredo Bezerra, Mozaniel Santana de Oliveira, Eloísa Helena de Aguiar Andrade, Ana Paula Martins dos Santos, Vânia Maria Borges Cunha, Daniele Cristina Silva dos Santos, Débora Ariane Dornelas da Silva Banna, Edinaldo Teixeira, Raul Nunes de Carvalho,

Food Chemistry and Fat Analysis

Abstract The oil extracts from palm kernel cake were obtained with supercritical CO2 at temperatures of (40–80) °C and pressures of (150–350) bar. The highest extraction yield on dry basis was (7.82 ± 0.28) %, obtained at 350 bar/80 °C; however, the oil fraction employed in the transesterification process was that obtained at 150 bar/40 °C. The transesterification reaction was performed under the following operating conditions: methanol/oil molar ratios of 24:1 and 42:1, temperatures of (250–350) °C, and reaction times of (5–25) min. A statistical analysis and mathematical modeling for the optimal yield of SFE were also performed. The fatty acid with the highest concentration was lauric acid (60.24 ± 0.62) % and the transesterification conditions affording the highest conversion of methyl esters (99.81 ± 0.10) % were a methanol/oil molar ratio of 42:1, 350 °C, and 5 min.