化工学报Issue(6)：2264-2269,6.DOI:10.3969/j.issn.0438-1157.2014.06.042
低温燃烧下NH3的氧化特性
Characteristics of ammonia oxidation in low-temperature combustion
摘要
Abstract
Low-temperature combustion, such as combustion of solid fuels (low-rank coals, biomass etc.) in grate furnaces or fluidized bed combustors, can make NH3 (fuel-nitrogen) conversion, which is an important source of NOx and N2O. To understand deeply on NH3 oxidation and production of nitrogen oxides in low-temperature combustion process, the effect of combustible gases (CO, CH4, or H2) and NO on ammonia oxidation reaction was experimentally investigated in a tubular flow reactor at temperature range 600-1000℃, and the concentrations of NO, NO2, NH3, CO, CH4 and O2 were monitored continually with online Fourier-transformed infrared gas analyzer (Gasmet DX-4000). The results obtained were analyzed to clarify the chemical reaction mechanism. It was found that trace amounts of CO, CH4, or H2 could promote the oxidation of ammonia and enhance the emissions of NOx and N2O significantly under the condition of low temperature and oxidizing atmosphere. At equal concentration, the effect of H2 on ammonia oxidation was the greatest, following was CH4 and CO. As concentration increase of the combustible gas, the ammonia concentrations in combustion product decreased and approached rapidly zero, while the emissions of NOx and N2O increased firstly and then arrived at a stable value. When there was NO in initial gas mixture, oxidation reaction of ammonia could be enhanced too.关键词
氨氧化/NOx/N2O/低温燃烧/一氧化碳/甲烷/氢Key words
ammonia oxidation/NOx/N2O/low-temperature combustion/carbon monoxide/methane/hydrogen分类
能源科技引用本文复制引用
曹庆喜,刘辉,吴少华,吴东阳,杨春晖..低温燃烧下NH3的氧化特性[J].化工学报,2014,(6):2264-2269,6.基金项目
国家重点基础研究发展计划项目(2006CB200303)；中央高校基本科研业务费专项资金（HIT NSRIF.2010032）。@@@@supported by the National Basic Research Program of China (2006CB200303) and the Fundamental Research Funds for the Central Universities (HIT NSRIF.2010032) （2006CB200303）
