中国电机工程学报Issue(35)：6279-6285,7.DOI:10.13334/j.0258-8013.pcsee.2014.35.004
含氧官能团对提质褐煤复吸水特性的影响
Influence of Oxygen-containing Groups on Moisture Re-adsorption Characteristics of Upgraded Lignite
摘要
Abstract
ABSTRACT:A lignite from Yunan province (Zhaotong lignite) was thermally upgraded from 200 ℃ to 500 ℃ under different atmospheres (nitrogen, mild oxidizing and organic atmosphere). Moisture re-adsorption characteristics of the upgraded lignite were investigated using a constant temperature and humidity chamber and the changes of oxygen-containing groups were analyzed by Fourier transform infrared spectroscopy (FTIR). The results indicated that the oxygen-containing groups and moisture re-adsorption ratio of the upgraded lignite decreased with the increasing of upgrading temperature. Hydroxyl and carbonyl groups were well correlated with the re-adsorption ratio, while ether groups had little influence on the moisture re-adsorption ratio. Moisture re-adsorption ratio of the upgraded lignite under mild oxidizing atmosphere was higher than that under nitrogen, which was caused by the oxidizing of aliphatic groups in lignite to hydroxyl, carbonyl and ether groups. On the other side, the moisture re-adsorption ratio of the upgraded lignite under organic atmosphere was lower than nitrogen, because the condensation reaction of hydroxyl in the lignite was promoted by ethanol, which decreased the contents of hydroxyl groups in the lignite.关键词
褐煤/热解提质/含氧官能团/傅里叶转换红外光谱/复吸水Key words
lignite/thermal upgrading/oxygen-containing groups/Fourier transform infrared spectroscopy (FTIR)/moisture re-adsorption分类
能源科技引用本文复制引用
张锦萍,张成,谭鹏,杨显军,苏杭,陈刚..含氧官能团对提质褐煤复吸水特性的影响[J].中国电机工程学报,2014,(35):6279-6285,7.基金项目
国家自然科学基项目(51006042)；湖北省自然科学基金项目(2012FFB02602)；华中科技大学自主创新基金项目(2013QN082)。Project Supported by National Natural Science Foundation of China(51006042) （51006042）
Natural Science Foundation of Hubei Province (2012FFB02602) （2012FFB02602）
Independent Innovation Fund of HUST(2013QN082) （2013QN082）
