绝氧加热过程中煤分子结构变化特性

Variatin law of the chemical structure of coal moleculars when heated with insulated oxygen

通过傅立叶红外光谱法,测得不同加热终温下,煤及其热解产物的红外吸收光谱,分析了煤分子结构中主要官能团的变化,讨论了绝氧加热过程中,煤分子结构随加热温度的变化状况.结果表明:在煤绝氧加热过程中,芳香烃随着加热温度的升高,总体呈现增加的趋势;脂肪烃随加热温度升高,总体变化趋势先增加再减少.总之,含氧官能团随加热温度的升高而增加,但中间也出现减少的趋势.

Through the analysis method of FTIR, the IR absorption spectras of coal pyrolysis products with different final heatet temperature were measured; and the changes of major functional groups in the chemical structure of coal moleculars were analyzed. The variatin law of the chemical structure of coal moleculars was discussed when heated with insulated oxygen. The results： when heated with insulated oxygen with the temperature increasing, the overall trend of the aromatic hydrocarbon first showed an increase; and the overall trend of the aliphatic hydrocarbons first showed an increase and later a decrease. Overall, the oxygen functional groups showed an increasing trend among decreasing trends.