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Radioactive tracer experiments on large stirrers for liquid‐liquid contacting
Author(s) -
Stemerding S.,
Groothuis H.,
Hoogendoorn C. J.
Publication year - 1965
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.5450430312
Subject(s) - tracer , propeller , phase (matter) , radioactive tracer , aqueous solution , flow (mathematics) , tube (container) , pulse (music) , mechanics , liquid phase , materials science , chemistry , engineering , marine engineering , physics , optics , thermodynamics , composite material , nuclear physics , organic chemistry , detector
The use of radioactive tracer techniques for studying the flow through large‐scale plant reactors under operating conditions is illustrated by tests on a 530‐cu. ft. stirred vessel used for contacting a hydrocarbon and an aqueous stream. The two streams had to be traced simultaneously. Simple equations are given for calculating the phase holdup from pulse response curves. It was found that the reactor, a vessel equipped with propeller stirrer and draught tube, contained a relatively large proportion of the heavier aqueous phase which even partly formed a dead zone at the bottom, when the propeller was pumping downwards. Reversal of the pumping direction resulted in an improved operation.