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‘Barrier Effect’ or Artifact? A Critical Assessment of the Dynamic Stationarized Method for k L a Measurement
Author(s) -
Moucha Tomáš,
Kordač Michal,
Linek Václav
Publication year - 1998
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/(sici)1521-4125(199809)21:9<753::aid-ceat753>3.0.co;2-u
Subject(s) - artifact (error) , surface tension , electrolyte , observational error , maxima , materials science , chemistry , chromatography , analytical chemistry (journal) , mathematics , computer science , statistics , thermodynamics , physics , artificial intelligence , electrode , art , art history , performance art
Analysis of the data measured by the dynamic stationarized method shows that this method significantly undervalues measured data even on measurement at low k L a values such as 0.06 s –1 , the value common in industry fermentors. It was shown that the maxima revealed by this method in the dependence of k L a on electrolyte (Na 2 SO 4 ) concentration and on surface tension of aliphatic alcohol solutions are not real phenomena but only the result of error in the measurement of k L a .