• 关键词：金属氧化物  CO₂分解  氧缺位  铁酸盐  反应活性

• 基金项目：

• 王力军
• 渝州大学化学系, 重庆40003

• 张春雷
• 吉林大学化学系, 长春 130023

• 吴通好
• 吉林大学化学系, 长春 130023

• 李爽
• 吉林大学化学系, 长春 130023

• 摘要：利用各种类型的简单和复合金属氧化物在H₂还原活化前后分解CO₂成C的活性试验的结果表明,决定金属氧化物分解CO₂活性的因素是氧缺位程度、尖晶石结构(包括NaCl型结构)及其含铁相。而其它各类金属氧化物活性均极低,甚至完全无活性。氧缺位铁酸盐(MFe₂O^4-δ(δ>0), M=Mg、Zn、Cu、Co、Ni、Mn、Fe)分解CO₂成C的活性较高,且按Mg2的速度越快,分解CO₂成C的量越大,在573K下Fe₃O_3.8281仅用75min就可将0.5L1.013×10⁵Pa的CO₂几乎100%地分解成炭。

• Abstract：The decomposition activity of carbon dioxide into carbon is examined by using various simplex and complex metal oxides reduced and unreduced by hydrogen gas. The activity of carbon dioxide decomposition is depended on the factors such as oxygen deficiency, spinel structure(including NaCl type structure) and iron phase being among the metal oxides. But the others with non spinel structure and the spinel oxides of non containing iron phase show extremely low active or even non active. Oxygen deficient ferrites (MFe₂O_4-δ, δ>0, M=Mg, Zn, Cu, Co, Ni, Mn, Fe) are highly active and their reactivity increases in the order of Mg<Zn<Cu<Co<Mn<Ni<Fe. The higher oxygen deficiency of ferrites, the higher is the decomposition rate of CO₂ and the larger is the amount of carbon by decomposing carbon dioxide. 0.5L carbon dioxide under the pressure of 1.013×10⁵Pa can be almost wholely decomposed into carbon finished in 75min at 573K using Fe_{3O3.8281 of oxygen deficient ferrites.}

• Key words：metal oxides  decomposition of CO₂  oxygen deficiency  ferrite  reactivity

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