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Application of the fourier transform to the measurement of K L a L in non‐mechanically agitated contactors
Author(s) -
André G.,
MooYoung M.,
Robinson C. W.
Publication year - 1985
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450630205
Subject(s) - contactor , bubble , fourier transform , mass transfer , conical surface , analytical chemistry (journal) , mass transfer coefficient , mechanics , chemistry , materials science , chromatography , thermodynamics , physics , mathematics , composite material , mathematical analysis , power (physics)
The authors recently proposed (André et al., 1981) a new method of measuring the overall volumetric mass transfer coefficient ( K L a L ) in gas‐liquid‐solid contactors of the bubble‐column type. The present paper deals with improved implementation of this method. The previous work showed that prior knowledge of the extent of backmixing in the gas phase was required in order to obtain reliable estimates of K L a L . It is shown here that parameter fitting in the frequency domain, using the Fourier transform of the response curves, may be used to estimate both K L a L and the extent of backmixing in the gas phase simultaneously. The main features of this particular approach are described in detail and are discussed in the light of experimental data obtained in two bench‐scale contactors (a bubble column and the novel inverted conical bottom contactor). In addition, the effect of contactor geometry and paper pulp addition on K L a L also is presented. It is shown that both the conventional bubble column and the novel contactor yield comparable gas‐liquid mass transfer rates.