酸化鉄を含む溶融酸化物とCO2-COガス間の酸素交換反応

  • 胡 暁軍
    中国北京科技大学冶金与生態工程学院物理化学系 東京大学大学院新領域創成科学研究科物質系専攻
  • 松浦 宏行
    東京大学大学院新領域創成科学研究科物質系専攻
  • 月橋 文孝
    東京大学大学院新領域創成科学研究科物質系専攻

書誌事項

タイトル別名
  • Oxygen Exchange Reaction between CO2-CO Gas and Molten Oxide Containing Iron Oxide
  • サンカテツ オ フクム ヨウユウ サンカブツ ト CO2 CO ガス カン ノ サンソ コウカン ハンノウ

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抄録

Oxygen exchange reaction rates between CO2-CO gas and molten oxides containing iron oxide have been measured by isotope exchange technique with 18O at 1773K with PCO<sub>2</sub>/PCO=1. Measured results represent that the oxygen exchange reaction rates show the maximum values at the beginning of the reaction and sharply decrease within approximately 20 s, and then gradually decrease with the reaction time proceeds. These changes indicate that the rate-limiting step would change from the dissociative adsorption of oxygen on the surface of molten oxide in the initial stage of reaction to the mass transfer of oxide ion from the surface to the inside of molten oxide in the following stage. Based on the kinetic analysis of the oxygen exchange process, CO2 dissociation rate constant, CO2 re-formation rate constant and the mass transfer coefficient of oxide ion in molten oxides were calculated for the FeOx-CaO and FeOx-SiO2 systems. Addition of CaO and SiO2 to molten oxide increases and decreases the oxygen exchange reaction rate, respectively.

収録刊行物

  • 鉄と鋼

    鉄と鋼 93 (5), 341-347, 2007

    一般社団法人 日本鉄鋼協会

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