粒度对煤孔隙特征影响的压汞实验研究
发布时间：2019-04-08 12:13
【摘要】：为了分析研究粒度对煤孔隙特征的影响,采用收集某矿煤样分别破碎筛分出3个不同粒径煤粒进行压汞实验。结果表明:阶段孔体积的分布曲线符合高斯函数,阶段比表面积的分布曲线符合Power函数;孔体积与比表面积具有相关性,其相关性随着孔径的增加而不断减小,进而分析了造成该现象的原因是由于煤样中存在微裂隙的影响;粒度影响煤粒孔体积的本质原因是煤样粒度改变了粒间孔体积大小,而粒内孔体积几乎不随粒度的改变而改变;孔直径小于1 000 nm的煤体孔隙孔体积和孔比表面积均具有明显的分形特征。
[Abstract]:In order to analyze the effect of particle size on pore characteristics of coal, mercury pressure experiments were carried out by collecting coal samples and separating three coal particles with different sizes. The results show that the phase pore volume distribution curve accords with Gao Si's function and the stage specific surface area distribution curve accords with Power function. Pore volume is correlated with specific surface area, and its correlation decreases with the increase of pore size. The reason for this phenomenon is analyzed because of the existence of micro-cracks in coal samples. The essential reason of the influence of particle size on the pore volume of coal is that the particle size of coal sample changes the pore volume between particles, but the pore volume within grain hardly changes with the change of particle size. The pore volume and specific surface area of coal with pore diameter less than 1 000 nm have obvious fractal characteristics.
【作者单位】： 煤科集团沈阳研究院有限公司;
【基金】：国家自然科学基金资助项目(51204088) 辽宁省教育厅一般资助项目(2016指教70号551610001180)
【分类号】：TD712
本文编号：2454564
[Abstract]:In order to analyze the effect of particle size on pore characteristics of coal, mercury pressure experiments were carried out by collecting coal samples and separating three coal particles with different sizes. The results show that the phase pore volume distribution curve accords with Gao Si's function and the stage specific surface area distribution curve accords with Power function. Pore volume is correlated with specific surface area, and its correlation decreases with the increase of pore size. The reason for this phenomenon is analyzed because of the existence of micro-cracks in coal samples. The essential reason of the influence of particle size on the pore volume of coal is that the particle size of coal sample changes the pore volume between particles, but the pore volume within grain hardly changes with the change of particle size. The pore volume and specific surface area of coal with pore diameter less than 1 000 nm have obvious fractal characteristics.
【作者单位】： 煤科集团沈阳研究院有限公司;
【基金】：国家自然科学基金资助项目(51204088) 辽宁省教育厅一般资助项目(2016指教70号551610001180)
【分类号】：TD712
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