Conversion of Hematite to Iron Carbides by Gas Phase Carbidization

この論文にアクセスする

この論文をさがす

著者

    • CONEJO Alberto N.
    • Institute Tecnologico de Morelia, Metallurgy and Mechanics Department, Av. Tecnologico #1500, Col.
    • MARTINS Gerard P.
    • Colorado School of Mines, Metallurgical and Materials Engineering Department

抄録

The intrinsic conversion rates of hematite (Fe<sub>2</sub>O<sub>3</sub>) to carbide (primarily cementite) with a CO-H<sub>2</sub> feed-gas have been measured in the temperature range 550 to 650 °C, by employing a micro-thermogravimetric system. As a preliminary analysis phase stability diagrams were developed in a triangular representation to overcome limitations of binary-type diagrams already available in the open literature. In general the reaction sequence was identified as consisting of a high-rate conversion of Fe<sub>2</sub>O<sub>3</sub> to Fe (33-75 %·min<sup>-1</sup>) followed by conversion of Fe to Fe<sub>3</sub>C. Two stages of carbidization were identified. For the first stage, the conversion rates were higher, from 55 to 75 %·min<sup>-1</sup>, depending on the reactor temperature. The rate of carbidization in the second stage region was lower, in the range of 25 to 35 %·min<sup>-1</sup>. The rate of carbidization was found to increase as temperature decreases, within the range from 600 to 640 °C. A model based on adsorption kinetics was developed which qualitatively describes the behavior observed. After conversion of Fe to Fe<sub>3</sub>C carbon deposition (sooting) was evident. The catalytic role of cementite (in contrast to Fe) in the heterogeneous sooting-reaction has also been addressed.

収録刊行物

  • ISIJ international

    ISIJ international 37(10), 967-976, 1997-10-15

    The Iron and Steel Institute of Japan

参考文献:  25件中 1-25件 を表示

  • <no title>

    STELLING O.

    USA Patent 2780 537, 1957

    被引用文献1件

  • <no title>

    STEPHENS F. M.

    USA Patent 5137 566, 1992

    被引用文献1件

  • <no title>

    HAGER J. P.

    USA Paten 5366 897, 1994

    被引用文献1件

  • <no title>

    CONEJO A. N.

    Ph. D. Thesis, Colorado School of Mines, 1995

    被引用文献1件

  • <no title>

    OJEBUOBOH K. F.

    PhD Thesis, Colorado School of Mines, 1985

    被引用文献1件

  • <no title>

    HOFER L. J. E.

    Catalysis 4, 373, 1956

    被引用文献1件

  • <no title>

    OLMER F.

    J. Phys. Chem. 46, 405, 1942

    被引用文献1件

  • <no title>

    KOLESNIK N. F.

    Metall. Trans. 11B, 285, 1980

    被引用文献1件

  • <no title>

    MANNING M. P.

    Ind. Eng. Chem. Process Des. Dev. 16, 358, 1977

    被引用文献2件

  • <no title>

    TURKDOGAN E. T.

    Metall. Trans. 5, 21, 1974

    被引用文献1件

  • <no title>

    DWYER D. J.

    J. Catalysis 87, 66, 1984

    被引用文献1件

  • <no title>

    KOCK A. J. H. M.

    J. Catalysis 96, 468, 1985

    被引用文献1件

  • <no title>

    ARAKI M.

    J. Catalysis 44, 439, 1976

    被引用文献1件

  • <no title>

    SATTERFIELD Ch. N.

    Heterogeneous Catalysis in Industrial Practice, 1991

    被引用文献1件

  • <no title>

    TAYLOR J.

    J. Iron Steel Inst. 1, 1956

    被引用文献1件

  • <no title>

    GRABKE H. J.

    Metall. Trans. 1, 2927, 1970

    被引用文献1件

  • <no title>

    GRABKE H. J.

    Ann. Rev. Mater. Sci. 5, 155, 1977

    被引用文献1件

  • <no title>

    EDSTROM J. O.

    J. Iron Steel Inst. 289, 1953

    被引用文献2件

  • <no title>

    TURKDOGAN E. T.

    Physical Chemistry of High Temperature Technology 412, 1980

    被引用文献1件

  • <no title>

    TURKDOGAN E. T.

    Metall. Trans. 5, 11, 1974

    被引用文献5件

  • <no title>

    MANNING M. P.

    Ind. Eng. Chem. Process Des. Dev. 16, 358, 1977

    被引用文献2件

  • <no title>

    MARCUS P.

    Hydrogen Degradation of Ferrous Alloys 36, 1985

    被引用文献1件

  • <no title>

    LAIDLER J. K.

    Catalysis I, 75, 1954

    被引用文献1件

  • <no title>

    GADSBY J.

    Proc. R. Soc. London 193A, 357, 1948

    被引用文献1件

  • <no title>

    KASPERSMA J. H.

    Metall. Trans. 12, 77, 1981

    DOI 被引用文献10件

被引用文献:  1件中 1-1件 を表示

各種コード

ページトップへ