ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Extensive gas phase dispersion data are reported for extremely high liquid-gas ratios in a cylindrical packed absorption tower operated at atmospheric pressure under counterflow conditions.The dispersion data report gas Peclet numbers in terms of superficial liquid and gas Reynolds numbers over the range \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} 0 & 〈 & {N{\mathop{\rm Re}\nolimits} _{\rm L} } & 〈 & {1500} \\ {15.0} & 〈 & {N{\mathop{\rm Re}\nolimits} _{\rm S} } & 〈 & {500} \\ \end{array} $$\end{document}An increase in Peclet number with increasing gas rate is observed at subloading conditions.Reverse gas flow was observed in the gas phase when the liquid Reynolds number exceeded 650. Dispersion in the gas phase at liquid rates for which NReL 〈 650 is consistent with previously recorded correlations but becomes independent of further increases of liquid rate when NReL is 〉 650.The dispersion coefficients obtained by dynamic testing under reverse gas flow conditions were consistent with those obtained from steady state absorption profiles and provide a quantitative explanation for the anomalies in plug-flow KLa at high water rates recorded by Sherwood and Holloway (1940).
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690200523
