中-高煤阶构造变形煤纳米级孔隙结构及其对甲烷吸附能力的影响

徐海飞; 潘结南

中-高煤阶构造变形煤纳米级孔隙结构及其对甲烷吸附能力的影响

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- 发布日期: 2015-12-19

Nanoscale Pore Structures of Medium and High Rank Tectonic Deformed Coal and Their Influence on Methane Adsorption

摘要

摘要: 通过镜质组反射率测试、显微组分测定、液氮吸附和等温吸附实验等，对河南中北部典型矿区6种中-高煤阶构造变形煤纳米级孔隙结构和吸附特征进行了研究。结果表明：中-高煤阶构造变形煤纳米级孔体积主要以过渡孔(10~100 nm)为主，而比表面积由微孔(1.5~10 nm）控制。纳米级孔体积、比表面积和过渡孔孔容从脆性变形碎裂煤、碎粒煤到韧性变形糜棱煤逐渐增大；中-高煤阶构造变形煤Langmuir体积与纳米级孔体积和比表面积之间呈线性正相关；过渡孔和微孔的分布关系对煤层气解吸特征产生重要影响，且过渡孔体积越大，甲烷解吸越容易。
- 中-高煤阶 /
- 构造变形煤 /
- 纳米级孔隙结构 /
- 吸附能力 /
- 甲烷解吸
Abstract: Based on vitrinite reflectance test, maceral determination, liguid nitrogen and isothermal adsorption test, nanoscale pore structures and adsorption characteristics of six tectonic deformed medium and high rank coal at typical mining field in the north central of Henan were studied. Results show that the pore volume and the specific surface area are respectively controlled by transitional pores (10 mm to 100 nm) and micropores (1.5 nm to 10 nm)．Nanoscale pore volume, specific surface area and transitional pore volume increased gradually from cataclastic structure coal, granulated coal in brittle deformation coal to mylonitic structure coal in ductile deformation coal; the relationship of Langmuir volume content with nanoscale pore entrance and the surface area of medium and high rank tectonic deformed coal was linear regression; the distribution relationship of transitional pores and micropores has important influence on the coalbed methane desorption characteristics, and the bigger the transitional pore’s volume, the easier the methane desorption.
- medium and high coal rank /
- tectonic deformation coal /
- nanoscale pore /
- adsorption capacity /
- methane desorption

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参考文献(22)

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中-高煤阶构造变形煤纳米级孔隙结构及其对甲烷吸附能力的影响

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出版历程

Nanoscale Pore Structures of Medium and High Rank Tectonic Deformed Coal and Their Influence on Methane Adsorption

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