中国电机工程学报2025，Vol.45Issue(8)：3046-3055,中插16,11.DOI:10.13334/j.0258-8013.pcsee.232122
氨煤混合比例对氨的NO生成/还原反应路径影响
Study on the Influences of NH3/Coal Cofiring Ratio on the NO Formation/Reduction Reaction Pathways of NH3
韩静洋 1谢妍 1李君 1刘欣 2张文振 2张超群 2李明 2牛涛 2王赫阳1
作者信息
- 1. 天津大学机械工程学院,天津市 津南区 300072
- 2. 烟台龙源电力技术股份有限公司,山东省 烟台市 264006
- 折叠
摘要
Abstract
Ammonia cofiring ratio(RNH3)is an important parameter affecting the carbon dioxide(CO2)reduction of coal-fired units.Although high RNH3 is beneficial to CO2 reduction,it may lead to significant increase in nitrogen oxide(NOx)emissions,which is going to hinder the application of ammonia/coal cofiring technology.In order to investigate the influence mechanism of RNH3 on NO emission,a chemical reactor network model of one-dimensional furnace is developed to investigate the influences of RNH3 on the NO production and reduction reaction pathways of NH3 by means of detailed chemical kinetic model.The predicted results replicate the experimentally observed trend of NO emission that first increases and then decreases with the increase of RNH3.It is shown that,under lower RNH3 the concentrations of HNO/N increase with the increase of RNH3 which leads to increased NO emission.Under higher RNH3,however,most of the H/OH radicals are consumed by the dehydrogenation reactions of NH3,which consequently inhibits the NO production reactions between the HNO/N and H/OH radicals,thus leading to reduced NO emission.Therefore,the root mechanism of the increase-then-decrease trend of NO emission with the increase of RNH3 is attributed to the competition to the H/OH radicals between the initial and final steps of the NO production reaction pathway.关键词
氨煤混燃/混氨比例/CO2减排/氮氧化物(NOx)/化学反应动力学Key words
ammonia/coal cofiring/ammonia cofiring ratio/CO2 reduction/NOx/chemical reaction kinetics分类
化学化工引用本文复制引用
韩静洋,谢妍,李君,刘欣,张文振,张超群,李明,牛涛,王赫阳..氨煤混合比例对氨的NO生成/还原反应路径影响[J].中国电机工程学报,2025,45(8):3046-3055,中插16,11.
