SciELO - Scientific Electronic Library Online

 
vol.42 issue1Tannase production by Penicillium atramentosum KM under SSF and its applications in wine clarification and tea cream solubilizationCitric acid production from orange peel wastes by solid-state fermentation author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Brazilian Journal of Microbiology

Print version ISSN 1517-8382

Abstract

PALAZZI, Emilio et al. Kinetic analysis of batch ethanol acetylation in isothermal non-stationary multiphase systems by lyophilized mycelium of Aspergillus oryzae. Braz. J. Microbiol. [online]. 2011, vol.42, n.1, pp. 388-393. ISSN 1517-8382.  http://dx.doi.org/10.1590/S1517-83822011000100048.

A relatively complex network of reactions has been investigated, using as a network model the isothermal batch esterification of acetic acid with ethanol in n-heptane catalyzed by lyophilized mycelium of Aspergillus oryzae. The kinetic analysis was firstly carried out on the whole system, without any simplification, by means of the well-known integral method. Owing to the poor results obtained by this way, we developed an alternative approach, combining initial rates and integral analysis and reducing the number of empirical parameters to be determined by the use of equilibrium data. All the values of the parameters calculated according to this "composite" approach to kinetic analysis well correlate with experimental data.

Keywords : Aspergillus oryzae; Complex network; Enzyme reactions; Esterification; Organic solvent.

        · text in English     · pdf in English