可溶有机质对煤的润湿性影响分析

李佳妮; 季淮君; 马鸿途; 吴盈; 毛珂; 任思敏

可溶有机质对煤的润湿性影响分析

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- 发布日期: 2017-06-19

Effect of Soluble Organic Matter on Wettability of Coal

摘要

摘要: 选择气煤和焦煤2种煤样，在常压，温度50 ℃条件下，采用四氢呋喃溶剂对煤样进行微波辅助萃取，采用上向渗透法和低温氮气吸附法对原煤和残煤（萃取后煤样）进行润湿试验和孔隙结构测试。结果表明：萃取后，煤样的总孔体积增大，可溶有机质被溶出，对煤孔隙主要起扩孔和增孔的作用;但因溶出可溶有机质赋存特征的不同，对气煤主要为扩孔，而焦煤主要为增孔；萃取后煤的润湿性明显降低，特别是气煤，相同润湿时间内原煤的润湿高度是残煤的2倍多。分析认为，煤中可溶有机质被溶解后，改变了煤的微观孔隙结构，减少了煤表面的甲基、羰基等基团，降低了煤的润湿性。
- 煤尘治理 /
- 煤的润湿性 /
- 溶剂萃取 /
- 可溶有机质 /
- 孔隙结构
Abstract: The gas coal and the coking coal were extracted with tetrahydrofuran（THF） solvent at 50 ℃ and atmospheric pressure by microwave-assisted extraction. The experiments using forward penetration method and low-temperature nitrogen adsorption method to carry out wettability test and pore structure for raw coal and their residues were carried out． The results indicate that the total pore volume increases after extraction and the soluble organic matter is dissolved, which plays a role of reaming and increasing pores. However, due to the different occurrence characteristics of dissolved soluble organic matter, gas coal is mainly for reaming pore and coking coal is mainly for increasing pore; the wettability of coal is significantly lower after extracting, gas coal in particular, the wetting height is more than twice of the residual coal at the same raw coal wetting time. The analysis suggests that the coal microcosmic pore structure is changed after the soluble organic matter dissolved, the methyl, carbonyl and other groups on the coal surface are reduced, and then the coals’ wettability is decreased.
- coal dust control /
- wettability of coal /
- solvent extraction /
- soluble organic matter /
- pore structure

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参考文献(18)

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可溶有机质对煤的润湿性影响分析

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Effect of Soluble Organic Matter on Wettability of Coal

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