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Effect of Gas Density on Gas Holdup in Bubble Columns
Author(s) -
Hecht Kristin,
Bey Oliver,
Ettmüller Jürgen,
Graefen Patrick,
Friehmelt Rainer,
Nilles Michael
Publication year - 2015
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201500010
Subject(s) - bubble , coalescence (physics) , mechanics , breakup , gas bubble , chemistry , thermodynamics , physics , astrobiology
Gas density affects the gas holdup in bubble columns. Even at atmospheric pressure, different gases produce varying gas holdups. This contribution explores the causes for variations in gas holdups occurring for different gases. Differences in the bubble size distribution resulting from varying rates of bubble breakup and coalescence as well as dissimilar bubble rise velocities are the most likely causes of differences. Correlations that include a term for gas density are able to qualitatively predict the effect of changing gas density, but no correlation can consistently predict the gas holdup for multiple systems.