Catalytic effect of iron on the carbon-carbon dioxide reaction kinetics.
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概要
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The kinetics of the reaction of porous pellets of carbon containing varying amounts of iron, 1 to 15% by weight, with carbon dioxide in the temperature range 850 to 1 000°C is investigated. It is observed that for both the uncatalysed and catalysed pellets the overall rate follows the Langmuir-Hinshelwood equation:Rate=K1PCO2/1+K2PCO+K3PCO2where K1, K2, and K3 are the rate parameters. Both the pore diffusion and chemical reaction affect the overall rate. The effect of pore diffusion has been quantitatively estimated using Thiele's concept of "effectiveness factor". Activation energy for the pore diffusion free intrinsic rate is estimated to be 80.57kcal/g•mol which decreases more or less linearly with increasing iron content. Analysis of the kinetic data indicates that iron addition enhances the rate of desorption of CO from the carbon surface and supports the electron transfer theory of catalysis.
- The Iron and Steel Institute of Japanの論文
The Iron and Steel Institute of Japan | 論文
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