碱性溶液对煤体甲烷吸附特征影响机制

doi:10.16265/j.cnki.issn1003-3033.2020.04.005

中国安全科学学报 ›› 2020, Vol. 30 ›› Issue (4): 28-32.doi: 10.16265/j.cnki.issn1003-3033.2020.04.005

碱性溶液对煤体甲烷吸附特征影响机制

周银波^1,2 讲师, 王思琪¹, 赵周¹, 关品品¹, 许静心¹, 吴金刚¹ 副教授

1.河南工程学院安全工程学院,河南郑州 451191;
2.河南理工大学河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地,河南焦作 454150

收稿日期:2020-01-14 修回日期:2020-03-21 出版日期:2020-04-28 发布日期:2021-01-27
作者简介:周银波(1988—),男,河南周口人,博士,讲师,主要从事安全工程方面的研究。E-mail:zhouyinbo2011@163.com。
基金资助:
国家自然科学基金资助(51804098);河南省高等学校重点科研项目(19A440001,20A440003);大学生创新创业训练计划项目(S201911517006); 河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地开放基金资助(WS2019B07)。

Influence mechanism of alkaline solution on methane adsorption of coal

ZHOU Yinbo^1,2, WANG Siqi¹, ZHAO Zhou¹, GUAN Pinpin¹, XU Jingxin¹, WU Jin'gang¹

1. School of Safety Engineering, Henan University of Engineering, Zhengzhou Henan 451191, China;
2. State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo Henan 454150, China

Received:2020-01-14 Revised:2020-03-21 Online:2020-04-28 Published:2021-01-27

摘要/Abstract

摘要： 为探究碱性溶液对煤体的化学增透特性,开展孔隙测试和吸附试验,分析碱溶液对煤体化学侵蚀效果及甲烷吸附能力的影响;以安徽省青东煤矿为研究对象,采用低温液氮吸附法和等温吸附法,测试碱性溶液处理前后煤样的孔隙和甲烷吸附特性,并采用分形理论和吸附理论量化分析试验结果。研究表明:碱溶液可有效改变煤体孔隙结构,提高孔径小于5 nm的微孔含量,试验煤样最大吸附量由17.83 mL/g升高至21.97 mL/g,煤样的吸附能力得到提高。

关键词: 碱性溶液, 煤体, 甲烷吸附, 黏土矿物, 孔隙结构

Abstract: In order to explore alkaline solution's enhancement on coal's chemical permeability, pore test and adsorption test were carried out to analyze influence of alkaline solution on chemical erosion effect of coal and its adsorption capacity of methane. With Qingdong coal mine from Anhui Province as research object, samples' pore and methane capacity characteristics before and after alkaline solution treatment were tested with low temperature liquid nitrogen adsorption method and isothermal adsorption method. Then, experiment results were quantitatively discussed using fractal theory and adsorption theory. The results show that alkaline solution can effectively change pore structure of coal and increase content of micropores at pore size less than 5 nm. Coal samples' adsorption capacity greatly improves with its maximum value increasing from 17.83 mL/g to 21.97 mL/g after alkali treatment.

Key words: alkaline solution, coal, methane adsorption, clay minerals, pore structure

中图分类号:

X936

周银波, 王思琪, 赵周, 关品品, 许静心, 吴金刚. 碱性溶液对煤体甲烷吸附特征影响机制[J]. 中国安全科学学报, 2020, 30(4): 28-32.

ZHOU Yinbo, WANG Siqi, ZHAO Zhou, GUAN Pinpin, XU Jingxin, WU Jin'gang. Influence mechanism of alkaline solution on methane adsorption of coal[J]. China Safety Science Journal, 2020, 30(4): 28-32.

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碱性溶液对煤体甲烷吸附特征影响机制

Influence mechanism of alkaline solution on methane adsorption of coal

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