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Titolo:
ABSORPTION ENHANCEMENT BY THE MARANGONI EFFECT - POOL ABSORPTION OF STEAM BY AQUEOUS LITHIUM BROMIDE SOLUTIONS WITH N-OCTANOL ADDITIVE
Autore:
WU TC; LU HH; YANG YM; MAA JR;
Indirizzi:
NATL CHENG KUNG UNIV,DEPT CHEM ENGN TAINAN 701 TAIWAN
Titolo Testata:
Journal of the Chinese Institute of Chemical Engineers
fascicolo: 5, volume: 25, anno: 1994,
pagine: 271 - 282
SICI:
0368-1653(1994)25:5<271:AEBTME>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Keywords:
MARANGONI EFFECT; ABSORPTION ENHANCEMENT; SURFACTANT ADDITIVES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
18
Recensione:
Indirizzi per estratti:
Citazione:
T.C. Wu et al., "ABSORPTION ENHANCEMENT BY THE MARANGONI EFFECT - POOL ABSORPTION OF STEAM BY AQUEOUS LITHIUM BROMIDE SOLUTIONS WITH N-OCTANOL ADDITIVE", Journal of the Chinese Institute of Chemical Engineers, 25(5), 1994, pp. 271-282

Abstract

The accelerating effects of surface-tension-driven Marangoni convection on interfacial heat and mass transfer were demonstrated by the absorption of steam by quiescent aqueous LiBr solution with n-octanol additive. Difference between surface and bulk temperatures and mass of steam absorbed consistently show that a small amount of n-octanol makes the enhancement factor considerably higher, and there is an optimum plateau. Beyond this plateau, further increase in n-octanol concentrationmakes enhancement factor lower. The effect caused by surfactant additive on quiescent liquid absorption can be quantified approximately to that caused by artificial agitation in liquid without additive. The effect of artificial liquid agitation on the absorption system in the presence of n-octanol was also studied to reveal the interaction betweenthe induced interfacial turbulence and the inherent bulk turbulence. The experimental results show that interfacial turbulence caused by surfactant additive plays a dominant role in a system of less intense inherent bulk turbulence. On the other hand, highly intense bulk turbulence dominates over the interfacial turbulence in enhancing absorption.

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Documento generato il 19/09/20 alle ore 09:15:36