| Citation: |
ZHAO Pengxiang，YI Chunyan，LI Shugang，et al. Evolution mechanism of thermodynamic characteristic parameters of CH4 adsorption influenced by structural coal quality ratio[J]. Coal Science and Technology，2024，52（8）：74−82. DOI: 10.12438/cst.2023-1277
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With the increasing depth of coal seam mining in China, the consequences of coal and gas outburst accidents are becoming more and more serious, which poses a great threat to mine safety production. Tectonic coal is one of the main coal sample types prone to outburst, and the outburst law and phenomenon change obviously with the proportion of tectonic coal quality. In order to explore the thermodynamic mechanism of gas adsorption in structured coal with different mass ratios, PCT-C80 adsorption calorimeter was used to carry out gas isothermal adsorption and calorimetric test based on mixed coal samples, and the calculation models of adsorption enthalpy, Gibbs free energy and gas adsorption entropy were established from the thermodynamic point of view. Based on the test and calculation results, the relationships between adsorption capacity and adsorption heat, gas adsorption constant and the proportion of structural coal with different mass ratios are discussed respectively, and the variation laws of gas adsorption enthalpy, surface free energy and adsorption entropy of structural coal with different mass ratios are analyzed. The results show thatthe gas adsorption heat of structural coals with different mass ratios increases with the increase of adsorption capacity; The adsorption heat and adsorption constant A both increase first and then decrease with the increase of structural coal mass ratio, and the adsorption constant B shows the opposite change law. With the increase of the ratio of structural coal, the gas adsorption heat, adsorption enthalpy and adsorption entropy all increase at first and then decrease, and all reaching the maximum when the proportion of structural coal is 50%, while Gibbs free energy shows the opposite change law; According to the test results and fitting formula, the mathematical relationship between the thermodynamic parameters of gas adsorption and gas emission in mixed coal is summarized. Through the above research, the variation law of thermodynamic characteristic parameters of gas adsorption under the influence of structural coal ratio is obtained, and the thermodynamic action mechanism of mixed coal samples is revealed, which provides a certain theoretical basis for clarifying the mechanism of coal induction and gas outburst caused by mining disturbed structural coal.
| [1] |
汪集暘,孔彦龙,段忠丰,等. “双碳”目标下煤田区地热资源开发利用与储能技术[J]. 煤田地质与勘探,2023,51(2):1−11. doi: 10.12363/issn.1001-1986.23.02.0104
WANG Jiyang,KONG Yanlong,DUAN Zhongfeng,et al. Geothermal energy exploitation and storage in coal field under the dual carbon goal[J]. Coal Geology & Exploration,2023,51(2):1−11. doi: 10.12363/issn.1001-1986.23.02.0104
|
| [2] |
程远平,胡彪. 基于煤中甲烷赋存和运移特性的新孔隙分类方法[J]. 煤炭学报,2023,48(1):212−225.
CHENG Yuanping,HU Biao. A new pore classification method based on the methane occurrence and migration characteristics in coal[J]. Journal of China Coal Society,2023,48(1):212−225.
|
| [3] |
杨孝波,许江,周斌,等. 煤与瓦斯突出发生前后煤层温度演化规律研究[J]. 采矿与安全工程学报,2021,38(1):206−214.
YANG Xiaobo,XU Jiang,ZHOU Bin,et al. Evolution law of coal seam temperature before and after coal and gas outburst[J]. Journal of Mining & Safety Engineering,2021,38(1):206−214.
|
| [4] |
CHEN F,ZHOU C,LI G,et al. Thermodynamics and kinetics of glyphosate adsorption on resin D301[J]. Arabian Journal of Chemistry,2012,9(S2):S1665−S1669.
|
| [5] |
李树刚,周雨璇,胡彪,等. 低阶煤吸附孔结构特征及其对甲烷吸附性能影响[J]. 煤田地质与勘探,2023,51(2):127−136. doi: 10.12363/issn.1001-1986.22.09.0743
LI Shugang,ZHOU Yuxuan,HU Biao,et al. Adsorption pore structure characteristics of low rank coal and effect on methane adsorption performance[J]. Coal Geology & Exploration,2023,51(2):127−136. doi: 10.12363/issn.1001-1986.22.09.0743
|
| [6] |
程远平,雷杨. 构造煤和煤与瓦斯突出关系的研究[J]. 煤炭学报,2021,46(1):180−198.
CHENG Yuanping,LEI Yang. Causality between tectonic coal and coal and gas outbursts[J]. Journal of China Coal Society,2021,46(1):180−198.
|
| [7] |
卢守青,王亮,秦立明. 不同变质程度煤的吸附能力与吸附热力学特征分析[J]. 煤炭科学技术,2014,42(6):130−135.
LU Shouqing,WANG Liang,QIN Liming. Analysis on adsorption capacity and adsorption thermodynamic characteristics of different metamorphic degree coals[J]. Coal Science and Technology,2014,42(6):130−135.
|
| [8] |
李祥春,张梦婷,李忠备,等. 气体吸附过程中煤比表面Gibbs函数变化规律[J]. 煤炭学报,2019,44(2):509−519.
LI Xiangchun,ZHANG Mengting,LI Zhongbei,et al. Variation law of coal specific surface Gibbs function in gas adsorption process[J]. Journal of China Coal Society,2019,44(2):509−519.
|
| [9] |
李树刚,白杨,林海飞,等. CH4、CO2和N2多组分气体在煤分子中吸附热力学特性的分子模拟[J]. 煤炭学报,2018,43(9):2476−2483.
LI Shugang,BAI Yan,LIN Haifei,et al. Molecular simulation of adsorption thermodynamics of multicomponent gas in coal[J]. Journal of China Coal Society,2018,43(9):2476−2483.
|
| [10] |
林海飞,蔚文斌,李树刚,等. 煤体吸附CH4及CO2热力学特性试验研究[J]. 中国安全科学学报,2018,28(6):129−134.
LIN Haifei,WEl Wenbin,LI Shugang,et al. Experimental study on thermodynamics characteristics of CH4 and CO2 adsorption on coal[J]. China Safety Science Journal,2018,28(6):129−134.
|
| [11] |
NODZENSKI A. Sorption and desorption of gases (CH4,CO2) on hard coal and active carbon at elevated pressures[J]. Fuel,2018,77(11):1243−1246.
|
| [12] |
刘志祥,冯增朝. 煤体对瓦斯吸附热的理论研究[J]. 煤炭学报,2012,37(4):647−653.
LIU Zhixiang,FENG Zengchao. Theoretical study on adsorption heat of methane in coal[J]. Journal of China Coal Society,2012,37(4):647−653.
|
| [13] |
肖鹏,赵鹏翔,林海飞. 混合煤样中软分层对煤与瓦斯突出的影响[J]. 西安科技大学学报,2013,33(1):18−22. doi: 10.3969/j.issn.1672-9315.2013.01.004
XIAO Peng,ZHAO Pengxiang,LIN Haifei. Influence of soft stratification on coal and gas outburst in mixed coal samples[J]. Journal of Xi’an University of Science and Technology,2013,33(1):18−22. doi: 10.3969/j.issn.1672-9315.2013.01.004
|
| [14] |
赵鹏翔,李树刚,张远琛,等. 混合煤样吸附瓦斯对孔隙比表面积影响的试验研究[J]. 中国安全科学学报,2016,26(10):104−109.
ZHAO Pengxiang,LI shugang,ZHANG Yuanchen,et al. Research on effect of methane adsorption on mixed coal on specific surface area of pore[J]. China Safety Science Journal,2016,26(10):104−109.
|
| [15] |
蔚文斌. 准南低阶煤孔隙结构对瓦斯吸附热力学特性影响实验研究[D]. 西安:西安科技大学,2017.
WEI Wenbing. Experimental study on the influence of pore structure of low-rank coal in Zhunnan on thermodynamic characteristics of gas adsorption[D]. Xi’an:Xi’an University of Science and Technology,2017.
|
| [16] |
宋昱,姜波,李明,等. 低中煤级构造煤超临界甲烷吸附特性及吸附模型适用性[J]. 煤炭学报,2017,42(8):2063−2073.
SONG Yu,JIANG Bo,LI Ming,et al. Super critical CH4 adsorption characteristics and applicability of adsorption models for low,middle-rank tectonically deformed coals[J]. Journal of China Coal Society,2017,42(8):2063−2073.
|
| [17] |
陈向军,赵伞,司朝霞,等. 不同变质程度煤孔隙结构分形特征对瓦斯吸附性影响[J]. 煤炭科学技术,2020,48(2):118−124.
CHENG Xiangjun,ZHAO San,SI Chaoxia,et al. Fractal characteristics of pore structure of coal with different metamorphic degrees and its effect on gas adsorption characteristics[J]. Coal Science and Technology,2020,48(2):118−124.
|
| [18] |
NIE B,LIU X,YANG L,et al. Pore structure characterization of different rank coals using gas adsorption and scanning electron microscopy[J]. Fuel,2015,158:908−917. doi: 10.1016/j.fuel.2015.06.050
|
| [19] |
洪林,王文静,高大猛,等. 低温氮吸附中煤阶对临界填充孔径的影响[J]. 中国安全科学学报,2022,32(4):51−58.
HONG Lin,WANG Wenjing,GAO Dameng,et al. Influence of coal rank on CPSD in low-temperature N2 adsorption[J]. China Safety Science Journal,2022,32(4):51−58.
|
| [20] |
刘慧. 混合煤样吸附特征影响因素及热力学特性实验研究[D]. 西安:西安科技大学,2021:26−32.
LIU Hui. Research on factors affecting adsorption and thermodynamic characteristics of mixed coal [D]. Xi’an:Xi’an University of Science and Technology,2021:26−32.
|
| [21] |
岳基伟,岳高伟,曹汉生. 基于吸附层厚度理论的软硬煤吸附机理解析[J]. 煤炭学报,2016,41(3):653−661.
YUE Jiwei,YUE Gaowei,CAO Hansheng. Mechanism analysis on adsorption properties of soft and hard coalbased on adsorption layer thickness theory[J]. Journal of China Coal Society,2016,41(3):653−661.
|
| [22] |
李树刚,赵鹏翔,林海飞,等. 混煤质量比对吸附常数及放散初速度的影响[J]. 辽宁工程技术大学学报(自然科学版),2012,31(5):586−589.
LI Shugang ,ZHAO Pengxiang ,LIN Haifei,et al. Effect of mass ratioof mixed coal on adsorption constants and initial velocity of methaneemission[J]. Journal of Liaoning Technical University (Natural Science),2012,31(5):586−589.
|
| [23] |
李树刚,孙香荣,林海飞,等. 混煤孔隙分布规律及其瓦斯吸附特性[J]. 辽宁工程技术大学学报(自然科学版),2015,34(2):155−159.
LI Shugang,SUN Xiangrong,LIN Haifei,et al. Pore distribution regularity and gas absorption characteristics of mixed coal[J]. Journal of Liaoning Technical University (Natural Science),2015,34(2):155−159.
|
| [24] |
蔡婷婷,赵东. 封闭体系中煤体升温解吸的热力学特性研究[J]. 地下空间与工程学报,2018,14(3):697−704.
CAI Tingting,ZHAO Dong. Thermodynamic characteristics of coal under temperature variation desorption in closed system[J]. Chinese Journal of Underground Space and Engineering,2018,14(3):697−704.
|
| [25] |
李希建,尹鑫,李维维,等. 页岩对甲烷高温高压等温吸附的热力学特性[J]. 煤炭学报,2018,43(S1):229−235.
LI Xijian,YI Xin,LI Weiwei,et al. Thermodynamic characteristics of isothermal adsorption of methane at high temperature and pressure in shale[J]. Journal of China Coal Society,2018,43(S1):229−235.
|
| [26] |
卢守青,撒占友,张永亮,等. 高阶原生煤和构造煤等量吸附热分析[J]. 煤矿安全,2019,50(4):169−172.
LU Shouqing,SA Zhanyou,ZHANG Yongliang,et al. Analysis on lsosteric adsorption heat of high-rank normal coal and deformed coal[J]. Safety in Coal Mines,2019,50(4):169−172.
|
| [27] |
虎维岳,李静,王寿全. 瓦斯在煤基多孔介质中运移及煤与瓦斯突出机理[J]. 煤田地质与勘探,2009,37(4):6−8. doi: 10.3969/j.issn.1001-1986.2009.04.002
HU Weiyue,LI Jing,WANG Shouquan. The flowing and outburst mechanism of gas in coal-based pore and fractured medium[J]. Coal Geology & Exploration,2009,37(4):6−8. doi: 10.3969/j.issn.1001-1986.2009.04.002
|
| [28] |
AITKEN J F,FLINT S S. The application of high-resolution sequence stratigraphy to fluvial systems:a case study from the Upper Carboniferous Breathitt Group,eastern Kentucky,USA[J]. Sedimentology,1995,42(1):3−30. doi: 10.1111/j.1365-3091.1995.tb01268.x
|
| [29] |
GASSER R P H. An Introduction to chemisorption and catalysis by metals[M]. Oxford:Oxford Science Publishers,Clarendon Press,1987:1−13.
|
| [30] |
张学梅,马青华,郝静远,等. 不同变质程度煤等量吸附焓计算过程中的热力学分析[J]. 煤质技术,2020,35(5):46−51.
ZHANG Xuemei,MA Qinghua,HAO Jingyuan,et al. Thermal dynamical analysis on the calculation of isosteric enthalpy of adsorption for different coal rank coal[J]. Coal Quality Technology,2020,35(5):46−51.
|
| [31] |
吴俊. 煤表面能的吸附法计算及研究意义[J]. 煤田地质与勘探,1994,22(2):18−23.
WU Jun. Calculation of coal surface energy by adsorption method and its research significance[J]. Coal Geology & Exploration,1994,22(2):18−23.
|
| [32] |
张增强,张一平. 几个吸附等温模型热力学参数的计算方法[J]. 西北农业大学学报,1998,26(2):99−103.
ZHANG Zengqiang,ZHANG Yiping. Calculation methods of thermodynamic parameters of several adsorption isothermal models[J]. Journal of Northwest A & F University(Natural Science Edition),1998,26(2):99−103.
|
| [33] |
聂百胜,何学秋,王恩元. 煤的表面自由能及应用探讨[J]. 太原理工大学学报,2000,31(4):346−348. doi: 10.3969/j.issn.1007-9432.2000.04.002
NIE Baisheng,HE Xueqiu,WANG,Enyuan. Surface free energy of coal and its calculation[J]. Journal of Taiyuan University of Technology,2000,31(4):346−348. doi: 10.3969/j.issn.1007-9432.2000.04.002
|
| [34] |
简阔,张玉贵,赫少攀,等. 构造煤甲烷吸附表面能研究[J]. 煤田地质与勘探,2014,42(1):31−34. doi: 10.3969/j.issn.1001-1986.2014.01.007
JIAN Kuo,ZHANG Yugui,HE Shaopan,et al. The surface energy of methane adsorption of tectonic coal[J]. Coal Geology & Exploration,2014,42(1):31−34. doi: 10.3969/j.issn.1001-1986.2014.01.007
|
| [35] |
周海,康敏. 不同过程吉布斯自由能变化值的计算公式[J]. 广州化工,2021,49(14):154−155. doi: 10.3969/j.issn.1001-9677.2021.14.056
ZHOU Hai,KANG Min. Calculation formula of Gibbs free energy variation in different processes[J]. Guangzhou Chemical Industry,2021,49(14):154−155. doi: 10.3969/j.issn.1001-9677.2021.14.056
|
| [36] |
邵志国,王起超,刘汝海,等. 泥炭吸附汞的热力学研究[J]. 湿地科学,2004,2(3):197−201. doi: 10.3969/j.issn.1672-5948.2004.03.006
SHAO Zhiguo,WANG Qichao,LIU Ruhai,et al. Research on the thermodynamics of adsorption of mercury on peat[J]. Wetland Science,2004,2(3):197−201. doi: 10.3969/j.issn.1672-5948.2004.03.006
|
| [37] |
张学梅,李东,马青华,等. 原生煤和构造煤的吸附等量线比较及与瓦斯突出的关系研究[J]. 煤炭加工与综合利用,2019(12):42−47.
ZHANG Xuemei,LI Dong,MA Qinghua,et al. Research about comparison on adsorption isostere between indigenous coal and tectonic coal and its relationship with outburst of gas[J]. Coal Processing & Comprehensive Utilization,2019(12):42−47.
|
| [38] |
蒋静宇,程远平,张硕,等. 低阶煤孔隙结构定量表征及瓦斯吸附放散特性[J]. 煤炭学报,2021,46(10):3221−3233.
JIANG Jingyu,CHENG Yuanping,ZHANG Shuo,et al. Quantitative characterization of pore structure and gas adsorption and diffusion properties of low-rank coal[J]. Journal of China Coal Society,2021,46(10):3221−3233.
|
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