• 关键词：催化  氧化亚氮  铁  氧化物

• 基金项目：博士后科学基金;国家重点基础研究发展规划项目资助(1999022209)

• 周浩生
• 东南大学热能工程研究所,南京 210096

• 陆继东
• 华中理工大学煤燃烧国家重点实验室,武汉 430073

• 周琥
• 华中理工大学煤燃烧国家重点实验室,武汉 430073

• 徐益谦
• 东南大学热能工程研究所,南京 210096

• 摘要：应用热综合分析仪(TG-FTIR)研究了在还原性气氛下Fe及其氧化物对N₂O的催化还原作用.研究发现铁氧化物对氮氧化物的催化还原能力相当弱,而Fe可以高效地降低N₂O分解的初始温度和提高N₂O向N₂O的转化率.在Fe和CO的作用下,N₂O的初始分解温度为920K和1000K.在1123K时,N₂O的转化率达到95%和80%.TG/DSC曲线表明了在Fe与N₂

• Abstract：Nitrous oxide(N₂O) is a greenhouse gas. With the development of fluidized bed combustion, the emission of the N₂O is generally observed. Chemical reactions between Fe and its oxides, N₂O and CO were investigated with TG-FTIR. The oxides of iron were found to be relatively un-reactive to the destruction of N₂O. The decomposition temperatures of N₂O were 1000K and 920K in the presence of Fe with/without CO, and the conversions of N₂O to N₂O at 1123K were 95% and 80%, respectively. TG/DSC curves confirmed that the most of iron oxides produced by Fe N₂O reaction could be reduced to metallic iron in the presence of CO. XRD pattern revealed that the N₂O reacted with iron to yield Fe₂O₃ as the major product. ESM showed that very porous structure was formed when N₂O reacted with Fe and CO. The results showed that Iron is a strong reducing agent for N₂O reduction.

• Key words：Catalyst  nitrous oxide  iron  oxides

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