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Decylacetate synthesis by enzyme catalysis in SC-CO2
Oliveira, M.V.; Rebocho, Sílvia F.; Ribeiro, Adriano S.; Ferreira, Olga; Vidinha, Pedro; Barreiros, Susana; Macedo, Eugénia A.; Loureiro, José M.The main purpose of this work was the study of long chain esters production, using decyl acetate as model compound, by enzymatic catalysis in supercritical media, with the aim of developing a sustainable, clean and efficient process as an alternative to the traditional chemical processes. The combination of a sustainable and clean technology, as biocatalysis, with a green/natural solvent, as supercritical CO2, ...
Decyl acetate synthesis by enzyme catalysis in sc-CO2
Rebocho, Sílvia F.; Ribeiro, Adriano S.; Ferreira, Olga; Oliveira, Manuela V.; Vidinha, Pedro; Barreiros, Susana; Macedo, Eugénia A.; Loureiro, José M.The synthesis of decyl acetate, from the transesterification of vinyl acetate with decanol, was studied in a high-pressure experimental set-up, equipped with a variable volume batch reactor, operating isothermally at 35 ºC and 100 bar, using CO2 in supercritical conditions as solvent, and Candida antarctica lipase B (CALB), immobilized on the macroporous resin Lewatit B (Novozym 435®), as catalyst. The enzymati...
Production of esters by biocatalysed transesterification in supercritical CO2 a...
Ribeiro, Adriano S.; Rebocho, Sílvia F.; Ferreira, Olga; Vidinha, Pedro; Barreiros, Susana; Macedo, Eugénia A.; Loureiro, José M.The development of sustainable processes that use renewable raw materials and minimize chemical and energetic waste has attracted considerable attention and represents a great challenge to both academic researchers and industrial experts. The use of enzymes to catalyse chemical transformations can constitute a more sustainable alternative to some traditional chemical processes and more than 100 biotransformatio...
Effectiveness factor for immobilized biocatalysts: two substratestwo products r...
Ribeiro, Adriano S.; Ferreira, Olga; Macedo, Maria E.; Loureiro, José M.Immobilized enzymes are being increasingly used as biocatalysts in numerous processes to obtain high-value products for the pharmaceutical, flavour and fragrance industries (Gandhi et al., 2000). The major advantages of immobilization include the increase in enzyme stability, the possibility of enzyme reutilization and the easy separation of the biocatalysts from the reaction mixture. However, it is necessary t...
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