Reduction of Carbon Dioxide to Carbon with Active Cation-Excess Magnetite

Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (6): 955.

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Reduction of Carbon Dioxide to Carbon with Active Cation-Excess Magnetite

ZHANG Chun-Lei¹, WU Tong-Hao¹, YANG Hong-Mao¹, JIANG Yu-Zi¹, PENG Shao-Yi²

1. Department of Chemistry, Jilin University, Changchun, 130023;
2. Shanxi Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan

Received:1994-08-30 Revised:1995-02-27 Online:1995-06-24 Published:1995-06-24

Abstract

Abstract: The cation-deficient magnetite(Fe_3+δO₄,δ<0)was synthesized by the oxidation of Fe(OH)₂suspensions at 358 K.The cation-excess magnetite(Fe_3+δO₄,δ>0)was obtained by flowing H₂gas through magnetite with cation-deficient composition at 563 K.The stability of Fe_3+δO₄(δ>0)was investigated at various temperatures and atmosphere.The reactivty of Fe_3+δO₄(δ>0)of reducing CO₂gas into carbon was studied at 358 K.The results confirm that CO₂was nearly 100% decomposed into carbon,the oxygen in CO₂is transferred in the form of O^2-to the cation excess magnetite.The bigger the cation-excess extent of magnetite,the higher the decomposability of CO₂,and the more O₂is produced indirectly.

Key words: Reduction of, CO₂, Cation-excess, Magnetite, Charcoal, Oxygen

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ZHANG Chun-Lei, WU Tong-Hao, YANG Hong-Mao, JIANG Yu-Zi, PENG Shao-Yi. Reduction of Carbon Dioxide to Carbon with Active Cation-Excess Magnetite[J]. Chem. J. Chinese Universities, 1995, 16(6): 955.

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Reduction of Carbon Dioxide to Carbon with Active Cation-Excess Magnetite

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