Measuring the kinetics of the reduction of iron oxide with carbon monoxide in a fluidized bed
Measuring the kinetics of the reduction of iron oxide with carbon monoxide in a fluidized bed
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DOI：
10.1007/978-3-642-02682-9_84
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发表时间：
2009-05
期刊：
影响因子：
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通讯作者：
C. D. Bohnt;J. Cleeton;C. Miiller;S. A. Scotr;J. S. Dennis
中科院分区：
文献类型：
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作者：
C. D. Bohnt;J. Cleeton;C. Miiller;S. A. Scotr;J. S. Dennis
在金属氧化物而不是空气的存在下燃烧固体燃料，化学链燃烧，产生适合封存的CO2和还原的金属。对于铁的情况，还原的氧化物可以用蒸汽再氧化以产生高纯度的氢气。在流化床中研究了氧化铁在一氧化碳和二氧化碳混合气体中的还原反应。测定了反应（i）3 Fe_2O_3 +CO_2 → 2 Fe_3O_4 + CO_2和（ii）0.947 Fe_3O_4 +0.788 CO_2 → 3 Fe_（0.947）O +0.788 CO_2 → 4的活化能和指前因子。验证了反应级数是统一的，并检查了速率随转化率的变化。
Combusting a solid fuel in the presence of a metal oxide rather than air, chemical looping combustion, generates CO2suitable for sequestration and the reduced metal. For the case of iron, the reduced oxide can be re-oxidized with steam to produce high-purity hydrogen. The reduction reactions of iron oxide in carbon monoxide and carbon dioxide mixtures were investigated in a fluidized bed. Activation energies and pre-exponential factors for the reactions (i) 3 Fe2O3+CO⇌2 Fe3O4+CO2and⇌(ii)0.947 Fe3O4+0.788 CO⇌3 Fe0.947O+0.788 CO2⇌were determined. The reaction order was verified to be unity, and the change in rate with conversion was examined.