煤矿安全2017，Vol.48Issue(12)：16-20,5.DOI:10.13347/j.cnki.mkaq.2017.12.005
不同浸水时间风干煤样瓦斯吸附解吸规律实验
Experimental Study on Gas Adsorption and Desorption Laws of Air-dried Coal Samples with Different Soaking Time
刘伟 1武德尧 1何超 1王贤田 1张继友 1宋奕澎1
作者信息
- 1. 中国矿业大学(北京)资源与安全工程学院,北京100083
- 折叠
摘要
Abstract
In order to study the gas adsorption and desorption laws of soaked and air-dried coal samples,the air-dried coal samples soaked with 3 day,15 day,30 day and raw coal without soaking were tested in the dynamic gas adsorption experiment under a constant temperature and pressure,we found that the experimental curves of cumulative amount of gas adsorption and desorption changed with time under different pressure.The experiment of specific surface area and pore size analysis on coal samples were conducted to obtain specific surface area,pore volume and pore size.The results show that the trend of the cumulative adsorption amount of air-dried coal samples with different soaking time changes with the gas pressure,which is consistent with the raw coal samples without soaking.The reciprocal of the desorption amount of soaked and air-dried coal samples is linearly related to the time function within the initial 20 min of desorption.With the increase of soaking time of air-dried coal samples,the saturated adsorption amount,specific surface area,total pore volume and micropore volume of air-dried coal samples decrease and then increase,but the average pore size increases first and then decreases.关键词
浸水时间/瓦斯吸附解吸/煤孔隙结构/函数关系式/解吸规律Key words
soaked time/gas adsorption and desorption/pore structure of coal/function formula/desorption law分类
矿业与冶金引用本文复制引用
刘伟,武德尧,何超,王贤田,张继友,宋奕澎..不同浸水时间风干煤样瓦斯吸附解吸规律实验[J].煤矿安全,2017,48(12):16-20,5.
