Hans Scheuren (1) and Michael Dillenburger (2). 1.
Ingenieurbüro Dr. Scheuren, Bad Kreuznach, Germany. 2. Dillenburger
und Hertel GmbH, Freising, Germany.
The subject of the current article is the introduction of
equations for precalculation of continuous cocurrent and
counter-current flow processes in terms of the evaporation of aroma
compounds and ethanol from beer during dealcoholization. Calculations
are performed for each process and their particular ethanol
evaporation. Finally, they are compared with each other. The
comparison’s result supports practical experiences saying that
dealcoholization always goes together with considerable losses of
valuable aroma compounds. In particular, the introduced calculations
show that a two-stage rectification reduces ethanol to a greater extent
than do comparable processes with cocurrent flow or discontinuous