CO歧化反应的控制因素及对耐火材料的影响

Control factors of CO disproportionation reaction and its effect on refractories

许多高温工业装备(如高炉、气化炉、干熄焦炉等)的服役环境为还原气氛。还原气氛中的CO在催化剂的作用下容易发生歧化反应,生成CO_(2)和固体碳,碳沉积在耐火材料的孔隙中,导致耐火材料过早地剥落或损毁。为此,从催化剂、CO分压、气氛组成、温度等控制因素阐述了CO的歧化反应,讨论了抑制碳沉积的方法,分析了歧化反应对耐火材料服役性能的影响,指出了今后工作的方向。

Much high-temperature industrial equipment operates in a reducing atmosphere,such as blast furnaces,gasifiers and coke dry quenching furnaces.CO in reducing atmospheres is prone to disproportionate under the action of catalysts,generating CO_(2)and solid carbon,which are deposited in the pores and gaps of refractories,thus leading to premature spalling or damage of refractories.For this reason,the disproportionation reaction of CO was described in terms of catalysts,CO partial pressure,atmosphere composition,temperatures and other controlling factors.The methods to inhibit carbon deposition were discussed.The effect of CO disproportionation reaction on the service performance of refractories was analyzed.The direction of the future work was pointed out.