摘要
在氩气氛围下,利用固定床反应器,对神华煤液化残渣从600°C到1200°C进行热解试验,研究了燃料中Tar-N、HCH-N、NH3-N、Char-N的析出规律,以及燃料中氮的分布特性。发现NH3的析出量在1000°C左右达到最大值而后略有降低,HCN-N的析出量随热解温度的升高而增加,Char-N的含量呈现反趋势下降。Tar-N的析出量在整个温度范围内都比较少,基本不随温度而变化。同时,通过对3种不同粒径燃料氮析出结果的对比,发现粒径对含氮物质析出影响不大;通过对4个不同热解时间的研究,发现HCN-N的析出比NH3的析出快。
Pyrolysis tests in the range of 600℃ to 1200℃, in an argon atmosphere, of residues of Shenhua coal liquification were performed with a fixed bed pyrolytic reactor. The excretion of Tar-N, HCN-N, NH3-N, Char-N as well as the distribution of Nitrogen in the Nitrogen containing fuel has hereby been studied. It was found that the yield of NH3 reached a maximum at about 1000℃, whereafter some reduction was noticed; that of HCN-N increased continuously with the pyrolysis temperature, while the Char-N content exhibited a contrary tendency. In the whole temperature range, the excretion of Tar-N was relatively small, and didn＇t change with temperature. Simultaneously, comparison of test results performed with nitrogen containing fuel particles of three different sizes showed, that particle size has but a small influence on the excretion of nitrogen containing components. Tests conducted with four different process durations showed that the release of HCN-N proceeds quicker than that of NH3 . Figs 6, table 1 and refs 9.
出处
《动力工程》
EI
CSCD
北大核心
2005年第6期879-882,共4页
Power Engineering
关键词
环境工程学
煤液化残渣
氮
HCN
NH3
environmental engineering
coal liquification residue
nitrogen
HCN
NH3
