摘要
含碳燃料在还原气氛下燃烧会生成炭黑,在动力设备的燃烧装置中,炭黑的后期氧化对污染控制是非常重要的。利用石英管固定床反应器对天然气扩散火焰中生成的炭黑在不同氧浓度下(20%、15%、10%和5%)的燃烧特性进行了研究,并选用了蜡烛炭黑、丁烷炭黑和煤焦作为对比。根据实验中得出的燃烧特性,与煤焦相比,炭黑的着火温度较低,但是炭黑的燃烧活化能相对更高。氧浓度对各试样着火温度影响不大,而却影响各试样燃烧过程。还进行了水蒸汽对天然气炭黑燃烧的影响研究,水蒸汽能引起炭黑燃烧速率的显著增大。
Soot is formed when carbonaceous fuels are burned under reducing conditions. For combustion installations of power equipment, subsequent oxidation of soot is of significant importance as concerns pollution. The combustion characteristics of soot, emerging in diffusion flames of natural gas, has been investigated on a fixed quartz pipe bed reactor under varying oxygen concentration（20%, 15 %, 10% and 5 % ） conditions and compared with the behavior of candle soot, butane soot and coal char. Soot combustion characteristics can be analyzed by way of the combustion characteristic parameters provided by test. Compared with coal char, soot has a lower ignition temperature but a higher combustion activation energy. Oxygen concentration didn＇t show any significant influence on the ignition of the different samples but affects noticeably the combustion processes. Studies on the influence of water vapor on combustion oxidation of soot from natural gas show, that water vapor causes the combustion rate of soot to rise remarkably. Figs 9 and refs 12.
出处
《动力工程》
EI
CSCD
北大核心
2006年第4期544-549,共6页
Power Engineering
基金
国家自然科学基金资助项目(50306015)
关键词
环境工程学
炭黑
燃烧特性
着火温度
固定床
environmental engineering
soot
combustion characteristics
ignition temperature
fixed bed
