NOx emission characteristics of pulverized coal combustion in O2/N2，O2/CO2 and O2/CO2/NO atmospheres

ZHANG Yongchun; ZHANG Jun; SHENG Changdong; ZHAO Liang; XIE Fang; CHEN Jie; LIU Yangxian

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NO_x emission characteristics of pulverized coal combustion in O₂/N₂，O₂/CO₂ and O₂/CO₂/NO atmospheres

更新时间：2025-12-10

- NO_x emission characteristics of pulverized coal combustion in O₂/N₂，O₂/CO₂ and O₂/CO₂/NO atmospheres
- CIESC Journal Issue 1, Pages: 159-165(2010)
- 作者机构：
  
  东南大学能源与环境学院
- 作者简介：
- 基金信息：
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- Online First：05 January 2010，
  
  Published：05 January 2010
- 稿件说明：
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ZHANG Yongchun, ZHANG Jun, SHENG Changdong, et al. NO_x emission characteristics of pulverized coal combustion in O₂/N₂，O₂/CO₂ and O₂/CO₂/NO atmospheres[J]. CIESC Journal, 2010, (1): 159-165.
DOI：

ZHANG Yongchun, ZHANG Jun, SHENG Changdong, et al. NO_x emission characteristics of pulverized coal combustion in O₂/N₂，O₂/CO₂ and O₂/CO₂/NO atmospheres[J]. CIESC Journal, 2010, (1): 159-165. DOI：

摘要

利用滴管炉研究了O2/N2、O2/CO2和O2/CO2/NO气氛下煤燃烧过程中NOx的排放特性。实验结果表明，在O2/N2和O2/CO2气氛下，高温或高O2浓度均使NO排放量增加。O2/CO2气氛下NO排放量比O2/N2气氛下NO排放量低大约30%～40%。在O2/CO2/NO气氛下，温度不同时，O2浓度变化对NO排放量的影响规律不同，对循环NO降解的影响规律也不同。高温不利于循环NO降解。随停留时间的延长NO排放量出现两个峰值。

Abstract

NOx emission characteristics during pulverized coal combustion in O2/CO2，O2/N2 and O2/CO2/NO atmospheres were studied by using a drop tube furnace.The results showed that in the O2/N2，atmosphere NO emission increased with the increase of O2 concentration or temperature.The same tendency of NOx emission was also found in the O2/CO2 atmosphere.However，the NOx emission in the O2/CO2 atmosphere was 30%—40% lower than that in the O2/N2 atmosphere.In the O2/CO2/NO atmosphere，the effects of O2 concentration on NOx emission as well as on recycled-NO reduction were different at different temperatures.High temperature did not favor recycled-NO reduction.There were two peak values of NOx emission with the increase of residence time.

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