文献类型：期刊文献

英文题名：Interactions between carbon and metal oxides and their effects on the carbon/CO2 reactivity at high temperatures

作者：Wu, Shiyong[1]; Zhang, Xiao[1]; Gu, Jing[1]; Wu, Youqing[1]; Gao, Jinsheng[1]

机构：[1] Department of Chemical Engineering for Energy Resources, East China University of Science and Technology, 200237 Shanghai, China

年份：2007

卷号：21

期号：4

起止页码：1827

外文期刊名：Energy and Fuels

收录：EI(收录号：20073310762319)

语种：英文

外文关键词：Carbon - Catalyst activity - Heat treatment - High temperature effects - Lime - Magnetite

摘要：Under the nitrogen atmosphere, carbothermal reactions of calcium oxide and magnetite began at about 900 and 820 °C, respectively. Above about 1200 °C, CaO reacted with carbon to form CaC2, and the interaction between carbon and CaO was dominant. At the temperature range of 820-920 °C, Fe3O4 was reduced quickly to Fe. After the process, with the increase of the heat-treatment temperature, Fe reacted with carbon to produce the eutectic compound of Fe and carbon (FexCy) and the mole ratio of C and Fe in FexCy became larger and larger but no Fe3C was presented. At the low-temperature range of 950-1100 °C, calcium oxide and magnetite separately presented a catalytic action on the reactivity of carbon and the mixture of calcium oxide and magnetite had a cocatalytic effect on the carbon reaction with CO2. Under the CO2 atmosphere, the carbothermal reactions of metal oxides were restrained in the temperature range (950-1100 °C) above the point, at which the carbothermal reaction of metal oxides started to take place under the N2 atmosphere. ? 2007 American Chemical Society.