超临界CO2对无烟煤孔隙结构影响的实验研究
DOI:
作者:
作者单位:

中国矿业大学 安全工程学院,中国矿业大学 安全工程学院,中国矿业大学 安全工程学院

作者简介:

通讯作者:

中图分类号:

TD75+2

基金项目:

国家自然科学基金(51304188)


Experimental study on influence of pore structure of anthracite coal before and after supercritical CO2 processing
Author:
Affiliation:

Faculty of Safety Engineering,China University of Mining Technology

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    通过实验室自主研发的超临界CO2高压加压装置,对临涣矿区的无烟煤进行处理,获得对比煤样,采用压汞法测试了超临界CO2处理前后煤孔隙的变化情况,获得了处理前后无烟煤孔隙结构的关键参数,同时对进退汞曲线进行分析,进而研究了孔径分布的变化规律。研究结果表明:超临界CO2处理后的无烟煤在微孔阶段(3nm~10nm)多峰现象明显减少,孔隙分布更加连续,大孔阶段(≥1000nm)的进汞量明显高于处理前的曲线,大孔和可见孔数量增多;无烟煤的孔隙度和总孔容在处理后增幅达到0.2336%和6.4%;超临界CO2在一定程度上促进了无烟煤的渗流孔的发育,抑制了吸附孔的发育。

    Abstract:

    High Pressure Experimental Set-up for supercritical CO2 was used to process anthracite coal from Linghuan mine area, and then reference sample was obtained. Mercury intrusion method was adopted to test the changes of pore structure of both, and the key parameter of pore structure was obtained before and after supercritical CO2 processing. Meanwhile, Accumulated mercury curves of anthracite coal was analyzed to figure out the changes of pore size distribution. The research results show that multi-peaks phenomenon in the stage of microporous (3nm~10nm) obviously decreased before and after supercritical CO2 processing, which can make pore distribution more continuous. The volume of total mercury intrusion in the stage of macropore (great than or equal to 1000nm) was apparently higher than the curves before supercritical CO2 processing, which means the number of macroporous increased. Porosity and pore volume of anthracite coal after supercritical CO2 processing increased 0.2336% and 6.4%, respectively. supercritical CO2 promotes the development of seepage pore and inhibits the development of absorption pore.

    参考文献
    相似文献
    引证文献
引用本文

张开仲,吴冬梅,谢懂. 超临界CO2对无烟煤孔隙结构影响的实验研究[J]. 科学技术与工程, 2016, 16(5): .
ZHANG Kai-zhong,,XIE Dong. Experimental study on influence of pore structure of anthracite coal before and after supercritical CO2 processing[J]. Science Technology and Engineering,2016,16(5).

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2015-10-16
  • 最后修改日期:2015-11-18
  • 录用日期:2015-11-26
  • 在线发布日期: 2016-02-22
  • 出版日期:
×
律回春渐,新元肇启|《科学技术与工程》编辑部恭祝新岁!
亟待确认版面费归属稿件,敬请作者关注