A Model of Homogeneous Bubble Nucleation of CO Bubbles in Fe–C–O Melts

Kwak, Ho‐Young; Oh, Si-Doek

doi:10.1006/jcis.1997.5244

Cited by 13 publications

(3 citation statements)

References 18 publications

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“…The calculation results are in good agreement with experimental observation: (i) the supersaturation for the massive bubble formation is specific for each gas and (ii) the surface tension effect of the solution and the increase in the gas solubility have a relatively small effect on the bubble formation. The gaseous bubble formation model discussed may be extended to predict bubble nucleation in iron melts [24] as well as microcellular foams in elastomer and polymer solutions [25], which are important in material processing. Of course, the bubble population density or the nucleation rate increases with increasing decompression amount P i − P f [25].…”

Section: Gas Bubble Formationmentioning

confidence: 99%

Gas–vapor bubble nucleation—a unified approach

Kwak

2004

Journal of Colloid and Interface Science

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Section: Gas Bubble Formationmentioning

confidence: 99%

Gas–vapor bubble nucleation—a unified approach

Kwak

2004

Journal of Colloid and Interface Science

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“…However, even if oxygen decreases the surface tension from 1?6 to 1 Nm 21 , the calculated supersaturation pressure is still extremely high (25 000 atm). 40 Gare et al 5 proposed that the nucleation was heterogeneous owing to entrainment of gas in the molten droplet. The entrained gas acted as a gas nucleus for heterogeneous nucleation.…”

Section: Introductionmentioning

confidence: 99%

Kinetic study of droplet swelling in BOF steelmaking

Chen

Coley

2010

Ironmaking & Steelmaking

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Previous work in the authors' laboratory has shown that an understanding of droplet swelling is essential in predicting droplet residence times in basic oxygen steelmaking. Several workers have observed swelling of high carbon droplets when exposed to oxidising slags. In the present work, the authors present data on swelling rates measured by X-ray fluoroscopy and compare this with the total volume of gas evolved during the reaction. It is shown that only a small percentage of the gas generated is retained in the droplet to contribute to swelling. The gas generation rate is shown to be controlled by the rate of nucleation of CO bubbles inside the droplet. The critical supersaturation pressure for nucleation is found to be two orders of magnitude less than predicted from theory, which is in keeping with many other studies on nucleation of gases in liquids. However, the effect of surface tension, temperature and saturation pressure shows quantitative agreement with theory.

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“…The adsorption of CO (a weak base) occurs on strong Lewis acid, highly co-ordinated, metal sites [24]. Besides chemisorbed oxygen coordinated with Cu(0) and Cu(I) may stabilize a CO cluster [25], while Cu(II) with co-ordination number six seems unstable relative to the CO adsorbed on oxides in which copper ions are found in square planar oxygen coordination [26].…”

Section: Electrochemical Impedance Spectroscopy Datamentioning

confidence: 99%

Cuprous Oxide Layers Grown on Copper: Effect of CO Adsorption

Gassa¹,

Luna²,

Sánchez³

et al. 2004

Port. Electrochim. Acta

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The semiconducting properties of anodic passive films formed on polycrystalline copper in aqueous borax solutions, pH 9.2, are studied using electrochemical impedance spectroscopy (EIS) and voltammetry. The semiconducting nature of the cuprous passive layer is analysed in the potential region near de rest potential as a function of the electrode potential and the presence of CO dissolved in the electrolyte. The oxide formation is explained as a sequence of Cu 2 O growth, cation adsorption, Cu(II), and dissolution steps similarly to previous reported investigations for the metal in CO free solutions. The different growth conditions change the defect or excess of cations accumulated in the outer side of the cuprous layer/electrolyte interface leading to different semiconducting properties.

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A Model of Homogeneous Bubble Nucleation of CO Bubbles in Fe–C–O Melts

Cited by 13 publications

References 18 publications

Gas–vapor bubble nucleation—a unified approach

Gas–vapor bubble nucleation—a unified approach

Kinetic study of droplet swelling in BOF steelmaking

Cuprous Oxide Layers Grown on Copper: Effect of CO Adsorption

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