Abstract
Measurements of the rates of dissociation of CO2 have been made by the14CO2-CO isotope exchange technique on liquid iron silicates, calcium iron silicates, and silica-saturated manganese silicates as functions of temperature and imposed equilibrium CO2/CO ratio. It is shown that the rates of reduction of the liquid iron silicates and an iron oxide-rich slag in CO-CO2 atmospheres are consistent with the rates of isotope exchange, indicating a common rate determining step. The dependences of the apparent first order rate constant on the oxygen activity for the dissociation of CO2 on silica-saturated iron silicates and an equimolar “FeO”-CaO-SiO2 melt are found to be closely consistent with the ability to transfer two charges to the adsorbing or dissociating CO2 molecule, as was previously found for liquid iron oxide and lime-saturated calcium ferrites. Apparent rate constants at fixed oxygen activity are found to increase generally with the basicities of the melts.
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Y. Sasaki, S. Hara, D. R. Gaskell, and G. R. Beiton:Metall. Trans. B, 1984, vol. 15B, pp. 563–71.
F. Tsukihashi, K. Kato, K. Otsuka, and T. Soma:Trans. Iron Steel Inst. Jpn., 1982, vol. 22, pp. 688–95.
A.M. Strachan and P. Grieveson:Metal-Slag-Gas Reactions and Processes, Z. A. Foroulis and W. W. Smeltzer, eds., The Electrochemical Society, Princeton, NJ, 1975, pp. 38–49.
G. R. Belton:Proceedings, International Symposium on Metallurgical Slags and Fluxes, H. A. Fine and D. R. Gaskell, eds., TMS-AIME, Warrendale, PA, 1984, pp. 63–85.
U. Din-Fen, A. F. Vishkarev, and V. I. Yavoiski:Izv. Vyssh. Ucheb,laved., Chern. Met., 1963, no. 1, pp. 27-33.
S.I. Popel and O.A. Esin:Zh. Fiz. Khim., 1956, vol. 30, pp. 1193–1201.
L. S. Darken and R.W. Gurry:J. Am. Chem. Soc, 1946, vol. 68, pp. 798–816.
H. Larson and J. Chipman:Trans. AIME, 1953, vol. 197, pp. 1089–96.
Y. Takeda, S. Nakazawa, and A. Yazawa:Can. Met. Quart., 1980, vol. 19, pp. 297–305.
S. C. Brown and W. W. Miller:Rev. Sci. Instr., 1947, vol. 18, pp. 496–500.
A.W. Cramb, W.R. Graham, and G. R. Belton:Metall. Trans. B, 1978, vol. 9B, pp. 623–29.
A. Ozaki:Isotopic Studies of Heterogeneous Catalysis, Kodansha Ltd., Tokyo and Academic Press Inc., New York, NY, 1977, pp. 25–27.
A. Muan and E. F. Osborn:Phase Equilibria Among Oxides in Steelmaking, Addison-Wesley Publishing Co. Inc., Reading, MA, 1965, pp. 113–15.
S. Ban-ya, Y. Iguchi, and T. Nagasaka: private communication, Tohoku University, 1984; alsoTetsu-to-Hagané, 1983, vol. 69, p. S761 and 1984, vol. 70, pp. A21-24.
H.A. Fine, D. Meyer, D. Janke, and H-J. Engel:Ironmaking Steelmaking, 1985, vol. 12, pp. 157–62.
M. Timucin and A. E. Morris:Metall. Trans., 1970, vol. 1, pp. 2193–2201.
T. Nagasaka: Ph.D. Thesis, Tohoku University, Sendai, 1985.
E.J. Michal and R. Schuhmann, Jr.:Trans. AIME, 1952, vol. 194, pp. 723–29.
S. K. Sharma and W. O. Philbrook:Trans. Iron SteelInst. Jpn., 1971, vol. 11, suppl. 1, pp. 569–74.
F.D. Richardson:Physical Chemistry of Melts in Metallurgy, Aca- demic Press Inc., London, 1974, vol. 2, pp. 441–42.
C.F. Cooper and C.L. McCabe:Physical Chemistry of Process Metallurgy, G. R. St. Pierre, ed., Interscience Publishers, New York, NY, 1961, Part 2, pp. 117–32.
C. F. Cooper and J. A. Kitchener:J. Iron Steel Inst., 1957, vol. 193, pp. 48–55.
J. H. Swisher and C. L. McCabe:Trans. TMS-AIME, 1964, vol. 230, pp. 1669–75.
K. Ono, K. Gunji, and T. Araki:J. Jpn. Inst. Metals, 1969, vol. 33, pp. 299–304.
K. Gunji and T. Dan:Trans. Iron Steel Inst. Jpn., 1974, vol. 14, pp. 162–69.
P. Kozakevitch:Rev. Met., 1949, vol. 46, pp. 572–82.
Y. Kawai, K. Mori, H. Shiraishi, and N. YamActa:Tetsu-to-Hagané, 1976, vol. 62, pp. 53–61.
E. T. Turkdogan:Physicochemical Properties of Molten Slags and Glasses, The Metals Society, London, 1983, pp. 241–44.
P. Kozakevitch:Rev. Met., 1949, vol. 46, pp. 505–16.
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Formerly Postdoctoral Fellow, Department of Metallurgy, University of Newcastle, New South Wales, Australia
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El-Rahaiby, S.K., Sasaki, Y., Gaskell, D.R. et al. Interfacial rates of reaction of CO2 with liquid iron silicates, silica-saturated manganese silicates, and some calcium iron silicates. Metall Trans B 17, 307–316 (1986). https://doi.org/10.1007/BF02655077
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DOI: https://doi.org/10.1007/BF02655077