Analysis of the difference between weathered coal and lignite in the conversion of biomethane
张双斌赵树峰郭红玉简阔
ZHANG Shuangbin;ZHAO Shufeng;GUO Hongyu;JIAN Kuo
晋城职业技术学院 矿业工程系河南理工大学 能源科学与工程学院太原科技大学 能源与材料工程学院
为查明风化煤与褐煤生物甲烷生成量差别的内在原因,分别选取风化煤和褐煤,以富集驯化的菌液为菌种来源,通过生物产气模拟,红外光谱、X射线光电子能谱、16srRNA测试、扫描电镜测试来分析风化煤与褐煤生物产气量差异性的内在机制。结果表明:褐煤的生物产气潜力(7.63 mL/g)大于风化煤(3.24 mL/g);褐煤相比于风化煤,在产气过程中各类基团脱落明显,芳香类物质更多的被转化为小分子量的其它物质,同时酚碳或醚碳(C—O)氧化更加明显,有利于形成更多的小分子有机酸类物质;褐煤相较于风化煤在生物产气过程中表面侵蚀较严重,出现了较多的孔裂隙,使得有机质能够从这些孔隙中析出,有利于微生物进一步利用产气;褐煤中细菌和古菌多样性低于风化煤,但主要功能菌群占比较大,细菌中
In order to find out the internal reasons for the difference in biological methane production between weathered coal and lignite, weathered coal and lignite were selected respectively, and the enriched and domesticated bacterial liquid was used as the source of bacteria. The internal mechanism of the difference in biological gas production between weathered coal and lignite was analyzed by biological gas production simulation, infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy and 16 S rRNA test. The results showed that the biogas production potential of lignite (7.63 mL/g) was higher than that of weathered coal (3.24 mL/g). Compared with weathered coal, in the process of gas production, various groups of lignite fall off obviously, aromatic substances are more converted into other substances with small molecular weight, and phenolic carbon or ether carbon (C—O) oxidation is more obvious, which is conducive to the formation of more small molecular organic acids. Compared with weathered coal, lignite has more serious surface erosion and more pore cracks in the process of biological gas production. The diversity of bacteria and archaea in lignite is lower than that in weathered coal, but the main functional flora accounts for a large proportion. The proportion of
生物甲烷风化煤褐煤物化特征菌群变化
biomethane;weathered coal;lignite;physical and chemical characteristics;microflora changes
主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会