不同处理方式对义马褐煤孔隙变化的影响研究

Effect of Different Treatment Methods on Pore Change of Yima Lignite

用鞘氨醇杆菌分别对义马原煤、甲醇萃取过的萃余物进行好氧处理,利用低温液氮吸附法对原煤、萃余物以及菌株降解后的煤样进行比表面积分析,对比煤样孔隙度的变化。结果发现:不同处理方式对煤样孔隙类型没有影响,甲醇萃取和生物好氧处理共同作用对煤样的孔隙变化作用最大,降解后褐煤比表面积较原煤增加31.24%,总孔容较原煤增加35.84%;单独从生物处理和甲醇处理来看,甲醇萃取效果优于生物好氧处理效果;在孔容微孔的变化上,甲醇萃取后再进行生物好氧处理效果没有生物好氧单独处理好。

The Yima raw coal and methanol extracted residues were aerobic treated with Sphingobacterium sp.The specific surface area of raw coal,extracts and coal samples degraded by the strain were analyzed with low-temperature liquid nitrogen adsorption method to compare the change of porosity of coal samples.The results showed that different treatment methods had no effect on the pore types of coal samples;methanol extraction and biological aerobic treatment had the greatest effect on the pore changes of coal samples;the specific surface area of lignite after degradation was 31.24% larger than that of raw coal,and the total pore volume was 35.84% larger than that of raw coal;from the perspective of biological treatment and methanol treatment alone,the effect of methanol extraction was superior to biological aerobic treatment;as for the change of pore volume and micropore,the effect of biological aerobic treatment after methanol extraction was not as good as that of biological treatment alone.