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煤中灰成分对CO还原NO反应的动力学研究进展
Investigation for the Dynamic of CO Reduction of NO by Ash Composition in Coal
【摘要】 针对CO还原NO动力学反应的发展现状,本文分析了煤中灰物质的主要成分(Fe2O3,CaO/MgO,Al2O3,SiO2等)对此还原反应的催化活性特征,同时考虑温度和压强对反应转化率的影响,本文进一步确定了NO-CO还原反应动力学参数.结果表明,相同实验条件下,灰成分的存在有效降低了还原反应过程中的活化能,从而增加了反应效率,实现了高效低氮燃烧.其中Fe2O3催化活性尤为显著,CaO对NO的转化率随温度的升高先增大后减小,而SiO2和Al2O3在反应中视为惰性组分.经综合分析,这种从源头上减少NOx排放含量的催化还原脱硝方法具有很好的应用前景.
【Abstract】 Based on the development status of kinetic reaction of CO reduction of NO,this paper analyzed the catalytic activity characteristics of the main components of coal ash(Fe2O3,CaO/MgO,Al2O3,SiO2,etc.)for this reduction reaction.Meanwhile, as temperature and pressure affect the reaction conversion, it also further determined the kinetic parameters of NO-CO reduction reaction.The results show that under the same experimental conditions, ash can effectively reduce the activation energy in the reduction reaction process, thus increasing the reaction efficiency and achieving high efficiency and low nitrogen combustion.The catalytic activity of Fe2O3 is particularly significant, and the conversion rate of CaO for NO first increases and then decreases with the increase of temperature, while SiO2 and Al2O3 are treated as inert components in the reaction.The comprehensive analysis indicates that the catalytic reduction denitrification method has very bright application prospects.
- 【文献出处】 辽宁大学学报(自然科学版) ,Journal of Liaoning University(Natural Sciences Edition) , 编辑部邮箱 ,2023年02期
- 【分类号】O643.1;X701
- 【下载频次】9