基于TG-FTIR研究尾矿对褐煤的原位催化脱硝

发布时间：2018-06-04 05:02

  本文选题：热重红外联用技术 + 褐煤　； 参考：《煤炭转化》2017年01期

【摘要】：针对褐煤燃烧过程中产生的NO及还原气体,采用热重红外联用技术研究尾矿加入后褐煤燃烧特性、NO生成量及还原气体的变化.结果表明,尾矿的加入对水分析出温度和挥发分燃烧温度的影响较小,但焦炭的起始燃烧温度相对降低,促进了焦炭燃烧阶段的进行.褐煤燃烧过程产生的还原气体主要为CH4,NH3,CO及脂肪烃类(—CH2),尾矿的加入催化了NO与还原气体的反应,低温条件下以NH3还原NO为主,且尾矿催化存在选择性,其对CO还原NO的催化强度较其他几种气体弱.
[Abstract]:Aiming at no and reducing gas produced in lignite combustion process, the combustion characteristics of lignite and the change of no production and reduction gas were studied by thermogravimetric infrared (TG-IR) technique. The results show that the addition of tailings has little effect on the temperature of water analysis and the combustion temperature of volatile matter, but the initial combustion temperature of coke is relatively lower, which promotes the combustion stage of coke. The reduction gases produced by lignite combustion are mainly Ch _ 4H _ 3N _ 3CO and fatty hydrocarbons, such as Ch _ 4H _ 3CO and fatty hydrocarbons. The reaction of no with reducing gas is catalyzed by the addition of tailings. At low temperature, the reduction of no is dominated by NH3, and the selectivity of tailings is also found. The catalytic strength of CO to reduce no is weaker than that of other gases.
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本文编号：1976050