Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/9078
Título: Modelling and optimization of ethyl butyrate production catalysed by Rhizopus oryzae lipase
Autor: Grosso, C.
Ferreira-Dias, Suzana
Pires-Cabral, P.
Palavras-chave: ethyl butyrate
immobilised lipase
Rhizopus oryzae
modelling
optimization
polyurethane foam
Data: 2013
Editora: Elsevier
Citação: "Journal of Food Engineering". ISSN 0260-8774. 115 (2013) 475-480
Resumo: Response surface methodology was used to model and optimise the production of ethyl butyrate, catalysed by Rhizopus oryzae lipase immobilised in a hydrophilic polyurethane foam. Experiments were carried out following a central composite rotatable design, as a function of reaction temperature (T: 22–38 C) initial butyric acid concentration (A: 0.031–0.619 M) and initial molar ratio ethanol/acid (MR; 0.257–2.443). After 48 h reaction time, the production of ethyl butyrate could be fitted to a surface described by a second-order polynomial model. A maximum ethyl butyrate concentration of 0.106 M, corresponding to 47% conversion into ester and a productivity of 2.21 lmole/mL h, is expected at initial reaction conditions of T, A and MR of 33 C, 0.225 M and 1.637, respectively. This maximum was experimentally confirmed
Peer review: yes
URI: http://hdl.handle.net/10400.5/9078
DOI: 10.1016/j.foodeng.2012.08.001
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