活性磁铁矿上CO_2直接还原成C的研究

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

活性磁铁矿上ＣＯ＿２直接还原成Ｃ的研究张春雷，吴通好，杨洪茂，姜玉子，彭少逸（吉林大学化学系，长春，１３００２３）（中国科学院山西煤炭化学研究所，太原）关键词ＣＯ＿２还原，阳离子过量，磁铁矿，炭，氧作为温室气体，ＣＯ２的大量排放及其在大气层中的不断积...

The cation-deficient magnetite(Fe3+δO4,δ<0)was synthesized by the oxidation of Fe(OH)2 suspensions at 358 K.The cation-excess magnetite(Fe3+δO4,δ>0)was obtained by flowing H2 gas through magnetite with cation-deficient composition at 563 K.The stability of Fe3+δO4(δ>0)was investigated at various temperatures and atmosphere.The reactivty of Fe3+δO4(δ>0)of reducing CO2 gas into carbon was studied at 358 K.The results confirm that CO2 was nearly 100% decomposed into carbon,the oxygen in CO2 is transferred in the form of O2- to the cation excess magnetite.The bigger the cation-excess extent of magnetite,the higher the decomposability of CO2,and the more O2 is produced indirectly.