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化学学报
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化学学报 ›› 1995, Vol. 53 ›› Issue (11): 1101-1105. 上一篇    下一篇

研究论文

Fe3+δO4的制备及CO2完全分解成碳的研究

张春雷;吴通好;杨洪茂;姜玉子;彭少逸   

  1. 吉林大学化学系
  • 发布日期:1995-11-15

Preparation of Fe3+δO4 and their complete decomposition of CO2 to carbon

ZHANG CHUNLEI;WU TONGHAO;YANG HONGMAO;JIANG YUZI;PENG SHAOYI   

  • Published:1995-11-15

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被引次数

1

在低温(358K)下用空气氧化Fe(OH)2悬浮液制备了阳离子缺位的磁铁矿(Fe3+δO4, 0.2>δ>0)。在563K下用H2还原活化Fe3+δO4制得了阳离子过量的磁铁矿(Fe3+δO4, 0.2>δ>0), 并考查了不同温度和气氛下该磁铁矿的稳定性。研究了CO2在Fe3+δO4上563K下的分解活性, 发现CO2几乎100%地还原成碳, 氧被以O^2^-离子形式转移给了Fe3+δO4, 而变成化学计量的Fe3O4。磁铁矿阳离子过量程度越大, 分解CO2的活性越高, 分解的量也越大。

关键词: 二氧化碳, 磁铁矿, 分解, 氧化铁, 氢氧化亚铁

The Cation-deficient magnetite (Fe3+δO4, 0.2>δ>0) was synthesized by the air oxidation of Fe(OH)2 suspensions at 358K. The cation-excess magnetite (Fe3+δO4, 0.2>δ>0) was obtained by flowing H2 gas through cation-deficient magnetite at 563K, the stability of the magnetite is examined at various temperpatures and under atomspheres. Reactivity of Fe3+δO4 (0.2>δ>0) to reduce CO2 gas into carbon was studied at 358K. The results confirm that CO2 was nearly 100% decomposed into carbon, the oxygen in the CO2 is transferred, in the form of O^2^-, to the cation excess magnetite. The bigger the cation-excess degree of magnetite, the higher the decomposition activation of CO2 is, the more the amount of decomposited CO2.

Key words: CARBON DIOXIDE, MAGNETITE, DECOMPOSITION, IRON OXIDE, FERROUS HYDROXIDE

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