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The application of spectral analysis in monitoring extraction column behavior
Author(s) -
Strand Michael J.,
Garlid Kermit L.
Publication year - 1975
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.5450530615
Subject(s) - spectral density , spectral analysis , bandwidth (computing) , extraction (chemistry) , correlation , limiting , materials science , physics , mathematics , chemistry , chromatography , statistics , telecommunications , geometry , spectroscopy , computer science , engineering , quantum mechanics , mechanical engineering
Correlation and spectral functions resulting from the analysis of organic phase volume fraction measurements on a pulsed, sieve‐plate solvent extraction column are presented, and some of the changes that occur as the flow characteristics of the column change are shown. Spectral functions reveal the shifts in operation more directly than do the correlation functions. General trends of both correlation and spectral functions with changing flow characteristics are discussed. Spectral density ratios which reflect the power density in the low frequency bandwidth from 0 to 0.1 Hz relative to that at the pulsing frequency are defined. These ratios are shown to correlate directly with the mode of column operation and are especially sensitive to incipient flooding. Hard limiting of the data prior to spectral analysis is shown to have little detrimental effect on the calculated functions of interest.