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Bubble formation through reaction at liquid-liquid interfaces
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Materialens processvetenskap.
2005 (engelsk)Inngår i: Steel Research International, ISSN 1611-3683, Vol. 76, nr 9, s. 616-623Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Slag foaming is an important phenomenon in steelmaking processes with both beneficial as well as negative effects. The present work is part of the wider project on the modelling of slag foaming, with special reference to dynamic conditions. Since bubble formation is the first step to foam formation, the present work was carried out in an attempt to simulate the bubble formation in slag/metal reactions in steelmaking processes by water-modelling experiments. The bubble formation due to the gas produced through chemical reaction at the interface between oleic acid and sodium bicarbonate solution was systematically monitored. The chemical reaction rate was varied by varying the concentration of sodium bicarbonate. The bubbles were observed to be generated in the heavier aqueous phase just below the water-oil interface. The bubbles penetrated the interface and escaped through the oil phase. The rate of the reaction was estimated from the volume of the gas that passed the water/oil interface. It was observed that the bubble formation and bubble growth mechanism were influenced by the reaction rate while the bubble size seemed to be unaffected by the reaction rate.

sted, utgiver, år, opplag, sider
2005. Vol. 76, nr 9, s. 616-623
Emneord [en]
bubble formation, interface, reaction rate, foaming
Identifikatorer
URN: urn:nbn:se:kth:diva-15100ISI: 000232488400002Scopus ID: 2-s2.0-25444479979OAI: oai:DiVA.org:kth-15100DiVA, id: diva2:333141
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QC 20100525Tilgjengelig fra: 2010-08-05 Laget: 2010-08-05bibliografisk kontrollert

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