细菌厌氧降解对烟煤孔隙及分形特征的影响

张攀攀; 郭红光; 段凯鑫; 陈　超

细菌厌氧降解对烟煤孔隙及分形特征的影响

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出版历程
- 发布日期: 2020-10-19

Effect of Bacterial Anaerobic Degradation on Pore Structure and Fractal Characteristics of Bituminous Coal

摘要

摘要: 为研究细菌厌氧降解对烟煤孔隙及分形特征的影响,通过高压压汞和低温液氮吸附对烟煤孔隙发育变化进行表征,分别利用Menger模型和FHH模型进行分形特征分析。结果表明:细菌厌氧降解后,一方面降解残煤微孔、过渡孔以及中孔孔容降低,比表面积降低更为显著,但同时也发现大孔孔容增加;另一方面降解残煤分形维数明显降低,表面粗糙程度降低,孔隙发育趋于简单;说明细菌厌氧降解后烟煤对煤层气吸附能力降低,而渗流能力部分增加。
- 厌氧降解 /
- 纳米孔隙 /
- 分形维数 /
- 高压压汞 /
- 低温液氮吸附
Abstract: In order to study the effect of bacterial anaerobic degradation on coal pores and fractal characteristics, the development of coal pores was characterized by high-pressure mercury injection and low-temperature liquid nitrogen adsorption. Menger model and FHH model were used to analyze the fractal characteristics. The results showed that after anaerobic degradation of bacteria, the micro-pores, transitional pores and meso-pores of residual coal were reduced, and the specific surface area was reduced more significantly. But at the same time, the large pore volume was increased. Besides, the dimension was obviously reduced, the surface roughness was reduced, and the pore development tended to be simple. These results showed that after anaerobic degradation, the coalbed methane adsorption capacity of bituminous coal reduced, while the seepage capacity partly increased.
- anaerobic degradation /
- nanopore /
- fractal dimension /
- high-pressure mercury injection /
- low temperature liquid nitrogen adsorption

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参考文献(14)

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