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Following the links below you find a continuously updated publication list of our group. In order to have an overview of our current publications please visit d|b|t|a's page on ResearchGate: Fachgebiet Dynamik und Betrieb technischer Anlagen

Dynamic modeling and simulation of an alembic pear wine distillation
Zitatschlüssel Sacher2013
Autor J. Sacher and L. Garcia-Llobodanin and F. Lopez and H. Segura and J.-R. Perez-Correa
Seiten 447–456
Jahr 2013
ISSN 0960-3085
DOI 10.1016/j.fbp.2013.04.001
Journal Food and Bioproducts Processing
Jahrgang 91
Nummer 4
Zusammenfassung Abstract In this research a phase equilibrium model to predict the recovery of several aroma compounds in spirits distilled in a traditional Charentais alembic has been developed. Due to the congenersâ?? quasi-infinite dilution, the properties of the mixture are assumed to be dependent on the ethanol mole fraction only. Thus, the system is treated as a quasi-binary mixture; the ethanol recovery, the dynamics of the condensation and the heat transfer processes are modeled independently of the congener's concentration. The model was calibrated with laboratory data obtained during the elaboration of pear distillates. The concentration of ethanol and 15 congeners in the distillate were measured with gas chromatography during the experiments. Fitting just two parameters, one for heating power and one for heat loss, was sufficient to reproduce the experimental ethanol recovery curves. This allowed an accurate prediction of most of the congener's recovery curves. The prediction of the concentration of five congeners, including acetaldehyde and methanol, are not significantly different from measured values. The prediction of the concentration of six congeners was biased but with relatively small errors (ranging between 8% and 25%). Significantly large prediction biases (more than 30%) were observed for ethyl hexanoate, ethyl decanoate and phenethyl alcohol.
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