摘要
研究低阶煤中不同显微组分对CO气体的吸附性能,对低阶煤自燃发火的预测与防治具有指导意义。对低阶煤中的惰质组与镜质组分别进行了30℃、40℃、50℃、55℃、60℃和65℃的等温吸附实验以及煤质分析、煤岩分析和傅立叶红外光谱(FTIR)分析。结果表明:当温度一定(T≤50℃)时,煤对CO的吸附量与压力之间的关系可用Langmuir方程来描述;当温度较高(T>50℃)时,煤对CO的吸附量与压力之间呈线性增加关系,且可采用Henry方程来描述,但此时温度对煤吸附CO的影响较复杂,有待进一步研究;此外,因低阶煤中的丝质体、含氧官能团和负电性官能团含量普遍较高,尤其羟基—OH含量较高,从而对煤中惰质组吸附CO产生较大的影响,而对镜质组吸附CO的影响较小。
The study of the CO adsorptive capability of every maceral of low rank coal is highly significant for choosing the index gas for estimating spontaneous combustion of low rank coal. Under different temperature and pressure, the isothermal adsorption tests of pure inertinite and vitrinite are carried out at 30℃、40℃、50℃、55℃、60℃、65℃ respectively, after analyzing the proximate, element and maceral of coal samples. The results show that the adsorption isotherm of CO can be described by Langmuir equation at low temperature（T≤50 ℃）; and the relationship is linear between the coal adsorption quantity of CO and the pressure at high temperature（T〉50 ℃）, it can be described by Henry equation, which increases with pressure, however, the temperature＇s effect is so complex that the mechanism need to study further. At the same time, the fusinit, oxygen-function groups and negative functional groups are high popularly in low rank coal samples, especially, the content of hydroxide（-OH） has great influence on CO adsorption in that the inertinite has stronger effect than vitrinite on adsorptive capability of low rank coal samples.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2008年第5期1-5,共5页
Coal Geology & Exploration
基金
国家自然科学基金项目(50474080)
