工程科学学报，第40卷，第4期：416-426,2018年4月 Chinese Journal of Engineering,Vol.40,No.4:416-426,April 2018 DOI:10.13374/j.issn2095-9389.2018.04.004:http://journals.ustb.edu.cn 不同粒径煤吸附瓦斯过程中的热电效应 陈 立12)，张英华”，黄志安)四，高玉坤”，杨锐” 1)北京科技大学金属矿山高效开采与安全教有部重点实验室，北京1000832)河北工程大学矿业与测绘工程学院，邯郸056038 ☒通信作者，E-mail:huang zac@q4.com 摘要选取3种不同变质程度的原煤，制成5种不同粒径的煤粒，并压制成型煤，在压力3MPa和温度25℃条件下对型煤试 样进行等温吸附实验，并利用SH-X多路温度测试仪和CHI660E型电化学工作站测试煤吸附瓦斯过程中的温度变化和电流一 时间曲线，基于Clausius-Clapeyron方程和相关性系数，分析和研究不同粒径煤吸附瓦斯过程中煤的热电效应及其相关性，试 图从煤的热电效应方面研究煤的吸附能力.结果表明：煤在吸附瓦斯过程中伴随有明显的热电效应，在吸附平衡时，煤的温度 升高了0.93-8.74℃，煤的电阻率比稳定时降低了0.14-0.16倍：煤的温度随粒径减小和吸附量的增加而升高，煤的电阻率 变化却相反：煤体温度和电阻率变化与瓦斯吸附量变化呈现很强的相关性，相关性系数r,和a分别介于0.9502~0.9899和 -0.9316~-0.9916之间，均接近于±1.因此，吸附过程中的热电效应可反映煤的吸附能力，在吸附平衡时，煤体温度变化越 大，温度越高，电阻率越小，说明煤的吸附能力越强：相反，说明煤的吸附能力越弱 关键词不同粒径：瓦斯吸附：温度：电阻率：热电效应：相关性 分类号TD712 Thermoelectric effect in process of gas adsorption in different particle sizes of coal CHEN Li),ZHANG Ying-hua,HUANG Zhi-an,GAO Yu-kun",YANG Rui 1)State Key Laboratory of High-Efficient Mining and Safety of Metal Mines Ministry of Education,University of Science and Technology Beijing,Beijing 100083,China 2)College of Mining and Surveying Engineering,Hebei University of Engineering,Handan 056038,China Corresponding author,E-mail:huang_za@qq.com ABSTRACT Coal strongly adsorbs methane and during the adsorption process there is always a thermal effect that leads to some changes in the coal structure and temperature.These changes have an electrical effect,such as a change in coal resistivity.The inves- tigation of the thermoelectric effect of the adsorption process of coal has long been a hot research issue to industry experts and scholars. It is important that this thermoelectric effect be well understand with respect to the energy transfer and translation in the adsorption process,as well as to support geophysical electrical prospecting and disaster prediction.Both domestic and international scholars have conducted many studies on this issue.The heating and electrical effects in the process of coal adsorption are interrelated.Previous re- search has primarily addressed the single characteristic of gas adsorption or its application,with little attention being paid to their corre- lation.Most studies have used adsorption quantity to reflect the coal adsorption ability,and few have focused on the thermoelectric effect to study coal adsorption.Studies regarding coal particle size and the thermoelectric effect are even rarer.In this study,we inves- tigated the temperature change and the current vs.time curves of three different metamorphic grade briquette coals,which consist of five different coal particle sizes,at a temperature of 25 C and pressure of 3 MPa in the coal gas adsorption process.To do so,we used a SH-X multi-ehannel temperature tester and CH1660E electrochemical workstation.To determine the adsorption ability of coal with re- spect to the thermoelectric effect,we used the Clausius-Lapeyron equation to analyze the thermoelectric effect mechanism of coal and 收稿日期：2017-0906 基金项目：国家自然科学基金资助项目(51474017)：河北省自然科学基金资助项目(E2014402037)工程科学学报，第 40 卷，第 4 期: 416--426，2018 年 4 月 Chinese Journal of Engineering，Vol． 40，No． 4: 416--426，April 2018 DOI: 10． 13374 /j． issn2095--9389． 2018． 04． 004; http: / /journals． ustb． edu． cn 不同粒径煤吸附瓦斯过程中的热电效应 陈 立1，2) ，张英华1) ，黄志安1) ，高玉坤1) ，杨 锐1) 1) 北京科技大学金属矿山高效开采与安全教育部重点实验室，北京 100083 2) 河北工程大学矿业与测绘工程学院，邯郸 056038 通信作者，E-mail: huang_za@ qq． com 摘 要 选取3 种不同变质程度的原煤，制成5 种不同粒径的煤粒，并压制成型煤，在压力 3 MPa 和温度 25 ℃条件下对型煤试 样进行等温吸附实验，并利用 SH--X 多路温度测试仪和 CHI660E 型电化学工作站测试煤吸附瓦斯过程中的温度变化和电流-- 时间曲线，基于 Clausius--Clapeyron 方程和相关性系数，分析和研究不同粒径煤吸附瓦斯过程中煤的热电效应及其相关性，试 图从煤的热电效应方面研究煤的吸附能力． 结果表明: 煤在吸附瓦斯过程中伴随有明显的热电效应，在吸附平衡时，煤的温度 升高了 0. 93 ～ 8. 74 ℃，煤的电阻率比稳定时降低了 0. 14 ～ 0. 16 倍; 煤的温度随粒径减小和吸附量的增加而升高，煤的电阻率 变化却相反; 煤体温度和电阻率变化与瓦斯吸附量变化呈现很强的相关性，相关性系数 rw 和 rd 分别介于 0. 9502 ～ 0. 9899 和 － 0. 9316 ～ － 0. 9916 之间，均接近于 ± 1． 因此，吸附过程中的热电效应可反映煤的吸附能力，在吸附平衡时，煤体温度变化越 大，温度越高，电阻率越小，说明煤的吸附能力越强; 相反，说明煤的吸附能力越弱． 关键词 不同粒径; 瓦斯吸附; 温度; 电阻率; 热电效应; 相关性 分类号 TD712 收稿日期: 2017--09--06 基金项目: 国家自然科学基金资助项目( 51474017) ; 河北省自然科学基金资助项目( E2014402037) Thermoelectric effect in process of gas adsorption in different particle sizes of coal CHEN Li1，2) ，ZHANG Ying-hua1) ，HUANG Zhi-an1)  ，GAO Yu-kun1) ，YANG Ｒui1) 1) State Key Laboratory of High-Efficient Mining and Safety of Metal Mines Ministry of Education，University of Science and Technology Beijing，Beijing 100083，China 2) College of Mining and Surveying Engineering，Hebei University of Engineering，Handan 056038，China Corresponding author，E-mail: huang_za@ qq． com ABSTＲACT Coal strongly adsorbs methane and during the adsorption process there is always a thermal effect that leads to some changes in the coal structure and temperature． These changes have an electrical effect，such as a change in coal resistivity． The inves￾tigation of the thermoelectric effect of the adsorption process of coal has long been a hot research issue to industry experts and scholars． It is important that this thermoelectric effect be well understand with respect to the energy transfer and translation in the adsorption process，as well as to support geophysical electrical prospecting and disaster prediction． Both domestic and international scholars have conducted many studies on this issue． The heating and electrical effects in the process of coal adsorption are interrelated． Previous re￾search has primarily addressed the single characteristic of gas adsorption or its application，with little attention being paid to their corre￾lation． Most studies have used adsorption quantity to reflect the coal adsorption ability，and few have focused on the thermoelectric effect to study coal adsorption． Studies regarding coal particle size and the thermoelectric effect are even rarer． In this study，we inves￾tigated the temperature change and the current vs． time curves of three different metamorphic grade briquette coals，which consist of five different coal particle sizes，at a temperature of 25 ℃ and pressure of 3 MPa in the coal gas adsorption process． To do so，we used a SH--X multi-channel temperature tester and CHI660E electrochemical workstation． To determine the adsorption ability of coal with re￾spect to the thermoelectric effect，we used the Clausius--Lapeyron equation to analyze the thermoelectric effect mechanism of coal and