低阶煤显微组分对混煤热解过程含氧官能团析出及转移规律的影响

采用化学滴定法，结合傅里叶红外分析，研究低阶煤显微组分对混煤含氧官能团析出及转移规律的影响，分析低阶煤镜质组分和惰质组分对混煤含氧官能团交互作用及析出转移规律的影响. 结果表明，混煤中酚、醇、醚、酯的C-O含氧官能团在热解温度达600℃时脱除达到基本稳定；400~600℃析氧率逐渐增加，之后稳定在30%左右，700℃后氧析出完全. 加入低阶煤使混煤热解过程中氢流失少于氧流失，有利于提高胶质体质量.

Effects of Low-rank Coal Macerals on Evolution of Oxygen Functional Groups in Pyrolysis of Mixed Coals

The chemical titration method combined with FT-IR analysis was used to study the effects of low rank coal macerals on the evolution of oxygen functional groups of coals and metastasis by analysis of different proportions, and the interactions of low rank coal vitrinite and inertinite with mixed coal containing functional group. The results showed that the phenol, alcohol, ether, ester C-O oxygen-containing functional groups of mixed coal reached a steady state when the pyrolysis temperature was 600℃, and the oxygen evolution rate increased at 400~600℃, then tended to be stable at about 30%. When the pyrolysis temperature was 700℃, oxygen precipitation was completed. Moreover, the addition of low rank coal macerals into fat coal would reduce the proportion of hydrogen less than the loss of oxygen of mixed coal in pyrolysis process, which was beneficial to improvement of the colloid quality.