| 氧缺位的磁铁矿型化合物转化CO2成C的研究 |
| STUDIES ON THE CONVERSION OF CARBON DIOXIDE INTO CARBON OVER THE OXYGEN-DEFICIENT MAGNETITE |
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| 摘要: 在高温(923K)下分解FeC2O4制备了阳离子缺位的磁铁矿(Fe3O4+δ,0≤δ<1),并用H2还原使它变为氧缺位的磁铁矿(Fe3O4-δ,0<δ<1)。在623K下研究了氧缺位磁铁矿对CO2分解成C的反应性能,发现CO2几乎100%地转化成C,CO2中的氧以O2-形式被磁铁矿的氧缺位捕获,变成化学计量的Fe3O4。XRD、Mssbauer谱及热失重和化学分析表明,H2还原磁铁矿的时间愈长,缺氧程度愈大,分解CO2的活性愈高,Fe3O4-δ、FeδO(0<δ<1)和α-Fe是CO2分解的活性相。 |
| 关键词: CO2转化 氧缺位 磁铁矿 炭 |
| 基金项目: |
| Abstract: A cationdeficient magnetite (Fe3 O4-δ,0 <δ<1) was prepared at high temperature 923K by decomposing Fe C2O4 and then transformed into an oxygendeficient magnetite (Fe3 O4-δ,0 <δ<1) through H2 reduction.The activity of decomposing carbon dioxide into carbon with oxygendeficient magnetite was studied at temperature 623K. It is found that carbon dioxide can be nearly completely(10 0 %) transformed into carbon and the oxygen in carbon dioxide is captured in the form of O2- by the magnetite.As a resultof reaction,the oxygendeficient magnetite is converted to the stoichiometric Fe3O4. The results of XRD, M ssbauer spectra,thermal and chemical analysesshow thatthe longer the time thatcationdeficientmagnetite is reduced by H2 is,the higher the oxygendeficiency degree of magnetite and the activity of itsdecomposing carbon dioxide are.α-Fe,FeδO and Fe3O4-δ(0 <δ<1) are all the active phases of decomposing carbon dioxide. |
| Keywords: conversion of carbon dioxide oxygen-deficiency magnetite carbon |
| 投稿时间：1995-03-22 |
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| 张春雷,吴通好,杨洪茂,姜玉子,彭少逸.氧缺位的磁铁矿型化合物转化CO2成C的研究[J].无机化学学报,1996,12(1):61-66. |
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