Research on SNCR Denitrification of Coal-fired Flue Gas under High Temperature Catalytic Conditions AITranslate
Abstract AITranslate
The denitration catalyst was prepared by impregnating the active components of rare earth tailings onto activated carbon particles.The influence of flue gas temperature,catalyst particle size and NH3/ NO ratio on the SNCR denitrification efficiency of the flue gas produced from high temperature coal-fired circulating fluidized bed boiler was investigated.The content of flue gas components was determined by flue gas analyzer combined with infrared spectrum analysis and then denitrification rate was calculated.The properties and microstructure of the catalyst were characterized by TG,SEM,XRD,TPD and TPR.The results show that the prepared catalyst exhibits high porosity,large specific surface area and good gas adsorption and desorption properties.Flue gas temperature and ammonia nitrogen ratio are important factors affecting the denitrification rate.With the increase of flue gas temperature,denitrification efficiency increases first and then decreases.With the increase of NH3/NO ratio,the decrease of catalyst particle size and the increase of catalyst addition,denitrification efficiency increases first and then decreases.The presence of the catalyst plays a significant role in improving the SNCR denitration efficiency of the coal fired circulating fluidized bed boiler flue gas.A part of Fe,Ce,La,Nd,Pr and other components of the catalyst are easily combined with activated carbon at high temperature to form a co-melt,which is conducive to the progress of the joint synergistic catalytic denitrification reaction.The prepared denitrification catalyst has higher specific surface area,acid content and reducibility than the raw ore.
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DOI：
Chinese Library Classification Number:X511[环境科学与工程—环境工程]
Citation Information:
The denitration catalyst was prepared by impregnating the active components of rare earth tailings onto activated carbon particles.The influence of flue gas temperature,catalyst particle size and NH3/ NO ratio on the SNCR denitrification efficiency of the flue gas produced from high temperature coal-fired circulating fluidized bed boiler was investigated.The content of flue gas components was determined by flue gas analyzer combined with infrared spectrum analysis and then denitrification rate was calculated.The properties and microstructure of the catalyst were characterized by TG,SEM,XRD,TPD and TPR.The results show that the prepared catalyst exhibits high porosity,large specific surface area and good gas adsorption and desorption properties.Flue gas temperature and ammonia nitrogen ratio are important factors affecting the denitrification rate.With the increase of flue gas temperature,denitrification efficiency increases first and then decreases.With the increase of NH3/NO ratio,the decrease of catalyst particle size and the increase of catalyst addition,denitrification efficiency increases first and then decreases.The presence of the catalyst plays a significant role in improving the SNCR denitration efficiency of the coal fired circulating fluidized bed boiler flue gas.A part of Fe,Ce,La,Nd,Pr and other components of the catalyst are easily combined with activated carbon at high temperature to form a co-melt,which is conducive to the progress of the joint synergistic catalytic denitrification reaction.The prepared denitrification catalyst has higher specific surface area,acid content and reducibility than the raw ore.
quote
| GB/T 7714-2015 | [1] WANG Kun, WU Wen-fei, ZHANG Shu-ning, et al. Research on SNCR Denitrification of Coal-fired Flue Gas under High Temperature Catalytic Conditions[J]. Rare Metals and Cemented Carbides, 2018(6): 86-92. |
| MLA | [1] WANG Kun, et al., "Research on SNCR Denitrification of Coal-fired Flue Gas under High Temperature Catalytic Conditions." Rare Metals and Cemented Carbides, no. 6, 2018, pp. 86-92. |
| APA | [1] WANG Kun, WU Wen-fei, ZHANG Shu-ning, MEI Zhe-yue, GONG Zhi-jun, LI Na, & ZHANG Kai. (2018). Research on SNCR Denitrification of Coal-fired Flue Gas under High Temperature Catalytic Conditions. Rare Metals and Cemented Carbides(6), 86-92. |
| IEEE | [1] WANG Kun, WU Wen-fei, ZHANG Shu-ning, MEI Zhe-yue, GONG Zhi-jun, LI Na, and ZHANG Kai, "Research on SNCR Denitrification of Coal-fired Flue Gas under High Temperature Catalytic Conditions," Rare Metals and Cemented Carbides, no. 6, pp. 86-92, 2018. keywords: {circulating fluidized bed;bituminous coal;SNCR;rare earth tailings;catalyst} |