摘要
对煤焦与NO的化学吸附过程进行了分析,研究了颗粒粒径和温度对煤焦吸附NO特性的影响;得到了吸附平衡和动态数据,利用漫反射红外光谱来研究煤焦经过表面吸附化学反应后官能团结构变化的信息,从而揭示煤表面吸附过程中发生的化学变化。结果表明,煤焦经化学吸附后表面增加了—NO2和—NO官能团,NO气体分子在煤焦表面主要发生的是二位吸附;并且随着煤样平均粒径的减小和温度的升高,—NO2和—NO官能团吸收峰强度明显增强,表明粒径减小和温度升高有利于煤焦化学吸附NO气体。
The fixed bed reactor was used to study the effect of particle size and temperature on NO absorption characteristics on coal char surface and obtain adsorption equilibrium and dynamic data. The evolution of functional groups and chemical changes of coal char surface structure were studied with diffuse reflection FTIR. Functional groups, such as aromatic -NO2 and -NO were observed. The major increment was aromatic -NO2. The band intensity of -NO2 and -NO functional groups increased with decreasing particle size and increasing temperature. The results showed that particle size and temperature had a noticeable effect on the adsorption of NO gas on coal char.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2007年第3期581-586,共6页
CIESC Journal
