Effect of adjusting coal properties on HulunBuir lignite pyrolysis
Effect of adjusting coal properties on HulunBuir lignite pyrolysis
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调整煤性质对呼伦贝尔褐煤热解的影响
DOI：
10.1016/j.fuproc.2016.10.002
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发表时间：
2017-02
影响因子：
7.5
通讯作者：
Feng Jie
中科院分区：
文献类型：
--
作者：
Ye Cui-Ping;Yang Zhen-Jian;Li Wen-Ying;Rong Hui-Ling;Feng Jie
有必要开发一种有效的方法来抑制褐煤热解过程中含氧官能团与矿物的交联反应。采用固定床反应器，在氮气气氛下，研究了热预处理、酸洗以及酸洗与热预处理相结合对褐煤低温热解的效果。采用傅里叶变换红外光谱、扫描电子显微镜和X射线衍射分析了预处理和未预处理褐煤的化学和物理特性。通过凝胶渗透色谱法估计焦油的分子量分布，并通过气相色谱法表征气体产物的组成。结构变化与热解性能之间的关系是讨论的重点。结果表明，酸洗后煤的孔隙和表面裂纹增多，羧基增多。预处理后焦油和天然气的产率提高，而焦炭和热解水的产率降低。焦油收率显着提高，即从原褐煤的 6.88 wt% 提高到热预处理后的 7.23 wt%，酸洗后的 8.57 wt%，酸洗结合热预处理后的 9.27 wt%。同时，热预处理后焦油的己烷可溶物从75.57 wt%增加到77.75 wt%，而酸洗后则下降到67.21 wt%和69.70 wt%。
It is necessary to develop an effective method to suppress cross-linking reactions of oxygen-containing functional groups and minerals during lignite pyrolysis. The effect of thermal pretreatment, acid-washing, and acid-washing combined with thermal pretreatment on lignite pyrolysis at a low temperature with a fixed-bed reactor under N2atmosphere was investigated. The chemical and physical characteristics of lignite with and without pretreatment were analyzed by Fourier transform infrared spectroscopy, scanning electron microscopy and X-ray diffraction. The molecular weight distributions of tars were estimated by gel permeation chromatography and the composition of gas products was characterized by using gas chromatography. The relation between the structure change and the pyrolysis performance is the key topic for discussion. The results show that there are more pores and surface cracks in coal after acid-washing, and the carboxyl groups increased. The yields of tar and gas were improved while the yields of char and pyrolysis water were reduced after pretreatment. The tar yields increased significantly, namely from 6.88 wt% for raw lignite to 7.23 wt% after thermal pretreatment, 8.57 wt% after acid-washing, and 9.27 wt% after acid-washing combined with thermal pretreatment, consequently. Meanwhile, the hexane soluble of tar increased from 75.57 wt% to 77.75 wt% after thermal pretreatment, while it decreased to 67.21 wt% or 69.70 wt% after acid-washing.
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中国褐煤过热蒸汽、微波、热风干燥后化学结构变化的研究
影响因子：
5.3
作者：
Tahmasebi, Arash;Yu, Jianglong;Stokie, David
通讯作者：
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DOI：
10.1016/j.proeng.2012.08.267
发表时间：
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期刊：
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影响因子：
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影响因子：
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作者：
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影响因子：
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作者：
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作者：
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