| Citation: |
CHEN Liwei，BIAN Le，WANG Dongjie，et al. Investigation on the impact of water on the competitive adsorption characteristics of CH4/CO2 in coal[J]. Coal Science and Technology，2024，52（4）：243−254. DOI: 10.12438/cst.2023-1999
|
In order to study the effect of water on the competitive adsorption of CH4/CO2 and mixed gases in coal, the self-developed multi-gas competitive adsorption experimental system of coal containing gas was used to conduct the research on the single component adsorption of CH4 and CO2 by coal with different water content. The experimental results show that: Water does not change the basic law of the isothermal adsorption curve of CH4 and CO2, and under the same conditions, water does not affect the ordering of coal's adsorption capacity for a single component of gas, and the adsorption capacity of coal for CO2 is always greater than that of CH4. Under the same conditions, the inhibition rate of water on CH4 is greater than that of CO2 adsorption capacity, indicating that the inhibition degree of water on coal's adsorption of weakly adsorbent gases is greater. The research on the effect of water on the competitive adsorption of mixed gas shows that: when the proportion of gas injected into the coal remains unchanged, under the same adsorption equilibrium pressure, the total adsorption of mixed gas decreases with the increase of water content, and the adsorption amount of CH4 and CO2 after adsorption equilibrium decreases with the increase of water content in the coal. When the water content is unchanged, the greater the gas adsorption equilibrium pressure under the same gas injection ratio, the greater the adsorption amount of CH4 and CO2 after adsorption equilibrium. The volume fraction of CO2 in the free phase is always lower than that of the gas source, while the volume fraction of CH4 is always higher than that of the gas source. Under different conditions, the values of CO2/CH4 selection coefficients are greater than 1, ranging from 4.8 to 5.4, and the adsorption affinity of coal for CO2 is greater than that of CH4. The selection coefficients of CO2/CH4 decrease with the increase of water content of coal samples under the same gas adsorption conditions. This study further improves the theoretical analysis of factors affecting coal gas adsorption, and provides a theoretical basis for engineering practice for underground gas injection and gas extraction technology.
| [1] |
黄中伟,李国富,杨睿月,等. 我国煤层气开发技术现状与发展趋势[J]. 煤炭学报,2022,47(9):3212−3238.
HUANG Zhongwei,LI Guofu,YANG Ruiyue,et al. Current status and development trend of coalbed methane development technology in China[J]. Journal of China Coal Society,2022,47(9):3212−3238.
|
| [2] |
王 刚,杨曙光,张寿平,等. 新疆煤矿区瓦斯抽采利用技术现状及展望[J]. 煤炭科学技术,2020,48(3):154−161.
WANG Gang,YANG Shuguang,ZHANG Shouping,et al. Current status and prospect of gas extraction and utilization technology in Xinjiang Coal Mining Area[J]. Coal Science and Technology,2020,48(3):154−161.
|
| [3] |
康红普,冯彦军,张 震,等. 煤矿井下定向钻孔水力压裂岩层控制技术及应用[J]. 煤炭科学技术,2023,51(1):31−44.
KANG Hongpu,FENG Yanjun,ZHANG Zhen,et al. Rock strata control technology and application of hydraulic fracturing by directional drilling in coal mine[J]. Coal Science and Technology,2023,51(1):31−44.
|
| [4] |
徐学锋,史鹏科,蒋 恒,等. 煤体松动爆破裂隙区扩展范围及分布规律研究[J]. 煤炭技术,2023,42(6):112−116.
XU Xuefeng,SHI Pengke,JIANG Heng,et al. Study on the expansion range and distribution law of loose blasting fracture area in coal[J]. Coal Technology,2023,42(6):112−116.
|
| [5] |
张明杰,李亚西,闫江伟,等. 瓦斯涌出衰减特征法测定水力冲孔抽采影响半径[J]. 煤炭科学技术,2022,50(7):156−162.
ZHANG Mingjie,LI Yaxi,YAN Jiangwei,et al. Determination of influence radius of hydraulic punch extraction by gas emission attenuation characteristic method[J]. Coal Science and Technology,2022,50(7):156−162.
|
| [6] |
杨宏民,冯朝阳,陈立伟. 煤层注氮模拟试验中的置换–驱替效应及其转化机制分析[J]. 煤炭学报,2016,41(9):2246−2250.
YANG Hongmin,FENG Chaoyang,CHEN Liwei. Displacement-displacement effect and transformation mechanism analysis of nitrogen injection in coal seam simulation experiment[J]. Journal of China University of Mining and Technology,2016,41(9):2246−2250.
|
| [7] |
李树刚,李泽帆,刘 鹏,等. 煤对N2/CH4/CO2混合气体竞争吸附特征与机理研究[J]. 中国矿业大学学报,2023,52(3):446–456.
LI Shugang,LI Zefan,LIU Peng,et al. Research on the competitive adsorption characteristics and mechanism of coal to N2/CH4/CO2 mixed gas[J]. Journal of Henan University of Technology,2020,39(4):20–26.
|
| [8] |
AKASH T. A study on the carbon dioxide injection into coal seam aiming at enhancing coal bed methane(ECBM) recovery[J]. Journal of Petroleum Exploration and Production Technology,2020,10(5):1965−1981.
|
| [9] |
罗明坤,李 胜,荣 海,等. CH4与N2,CO2间竞争吸附关系的核磁共振试验研究[J]. 煤炭学报,2018,43(2):490−497.
LUO Mingkun,LI Sheng,RONG Hai,et al. Experimental study on competitive adsorption relationship between CH4 and N2,CO2 by NMR[J]. Journal of China Coal Society,2018,43(2):490−497.
|
| [10] |
吕宝艳,杨宏民,吕晓来,等. 混合气体对煤中CH4置换效率的影响研究[J]. 河南理工大学学报,2020,39,(4):20–26.
LYU Baoyan,YANG Hongmin,LYU Xiaolai,et al. Study on effect of gas mixture on CH4 displacement efficiency in coal [J]. Journal of Henan Polytechnic University,2019,39(4):20–26.
|
| [11] |
江兆龙,周禹军,刘 伟,等. 煤对CO2,N2和CH4的吸附速率经验公式与异同性研究[J]. 中国安全生产科学技术,2020,16(9):83−88.
JIANG Zhaolong,ZHOU Yujun,LIU Wei,et al. Experimental study on the adsorption rates of CO2,N2 and CH4 by coal[J]. China Safety Science and Technology,2020,16(9):83−88.
|
| [12] |
韩 光,付志豪,白 刚,等. CO2注气压力对 CH4驱替特性影响试验研究[J]. 中国安全生产科学技术,2022,18,(8):85−90.
HAN Guang,FU Zhihao,BAI Gang,et al. Experimental study on the influence of CO2 injection pressure on CH4 displacement characteristics[J]. China Safety Science and Technology,2022,18,(8):85−90.
|
| [13] |
王 晖,孙 龙. 不同温度条件下煤层气等温吸附试验研究[J]. 山西煤炭,2018,38(2):71−75.
WANG Hui,SUN Long. Experimental study on isothermal adsorption of coalbed methane under different temperature conditions[J]. Shanxi Coal,2018,38(2):71−75.
|
| [14] |
白 刚,姜延航,周西华,等. 不同CO2注入温度置换驱替 CH4特性试验研究[J]. 煤炭科学技术,2021,49(5):167−174.
BAI Gang,JIANG Yanhang,ZHOU Xihua,et al. Experimental study on the displacement characteristics of CH4 at different CO2 injection temperatures[J]. Coal Science and Technology,2021,49(5):167−174.
|
| [15] |
樊亚庆,王兆丰,陈金生,等. 水分对煤中瓦斯的置换作用试验研究[J]. 煤矿安全,2017,48(12):25−27, 32.
FAN Yaqing,WANG Zhaofeng,CHEN Jinsheng,et al. Experimental study on replacement effect of water to gas in coal[J]. Safety in coal mines,2017,48(12):25−27, 32.
|
| [16] |
杨宏民,王兆丰,任子阳. 煤中二元气体竞争吸附与置换解吸的差异性及其置换规律[J]. 煤炭学报,2015,40(7):1550−1554.
YANG Hongmin,WANG Zhaofeng,REN Ziyang. Differences between competitive adsorption and replacement desorption of binary gases in coal and its replacement laws[J]. Journal of China Coal Society,2015,40(7):1550−1554.
|
| [17] |
陈 跃,马卓远,马东民,等. 不同宏观煤岩组分润湿性差异及对甲烷吸附解吸的影响[J]. 煤炭科学技术,2021,49(11):47−55.
CHEN Yue,MA Zhuoyuan,MA Dongmin,et al. Wettability differences of different macroscopic coal rock components and their effects on methane adsorption and desorption[J]. Coal Science and Technology,2021,49(11):47−55.
|
| [18] |
CHEN M,CHENG Y,LI H,et al. Impact of inherent moisture on the methane adsorption characteristics of coals with various degrees of metamorphism[J]. Journal of Natural Gas Science and Engineering,2018,55:312−320.
|
| [19] |
DAY S,SAKUROVS R,WEIR S. Supercritical gas sorption on moist coals[J]. International Journal of Coal Geology,2008,74(3):203−214.
|
| [20] |
GENSTERBLUM Y,MERKEL A,BUSCH A,et al. High-pressure CH4 and CO2 sorption isothermsas a function of coal maturity and the influence of moisture[J]. International Journal of Coal Geology,2013,118:45−57.
|
| [21] |
NIE B,LIU X,YUAN S,et al. Sorption charateristics of methane among various rank coals:impact of moisture[J]. Adsorption,2016,22(3):315−325.
|
| [22] |
肖知国. 煤层注水抑制瓦斯解吸效应试验研究与应用[D]. 焦作:河南理工大学,2010.
XIAO Zhiguo. Experimental study and application of water injection in coal seam to inhibit gas desorption[D]. Jiaozuo:Henan University of Technology,2010.
|
| [23] |
郭红玉,苏现波. 煤层注水抑制瓦斯涌出机理研究[J]. 煤炭学报,2010,35,(6):928−931.
GUO Hongyu,SU Xianbo. Study on the mechanism of water injection in coal seam to inhibit gas emission[J]. Journal of China Coal Society,2010,35,(6):928−931.
|
| [24] |
李晓华,王兆丰,李青松,等. 水分对新景矿3号煤层瓦斯解吸规律的影响[J]. 煤炭科学技术,2011,39(5):47−50.
LI Xiaohua,WANG Zhaofeng,LI Qingsong,et al. Influence of water on the law of gas desorption in No. 3 coal seam of Xinjing Mine[J]. Coal Science and Technology,2011,39(5):47−50.
|
| [25] |
吴家浩,王兆丰,苏伟伟,等. 自吸水分对煤中瓦斯解吸的综合影响[J]. 煤田地质与勘探,2017,45(1):35−40.
WU Jiahao,WANG Zhaofeng,SU Weiwei,et al. Comprehensive influence of self-absorbed water on gas desorption in coal[J]. Coal Geology and Exploration,2017,45(1):35−40.
|
| [26] |
王兆丰,苏伟伟,陈向军,等. 含瓦斯煤自然吸水渗吸试验研究及机理探析[J]. 煤炭科学技术,2015,43(8):72–76.
WANG Zhaofeng,SU Weiwei,CHEN Xiangjun,et al. Experimental study on natural water absorption and imbibition of coal containing gas and its mechanism analysis[J]. Coal Science and Technology,2015,43(8):72–76.
|
| [27] |
陈向军. 外加水分对煤的瓦斯解吸动力学特性影响研究[D]. 徐州:中国矿业大学,2013.
CHEN Xiangjun. Influence of added water on the kinetic characteristics of coal gas desorption[D]. Xuzhou:China University of Mining and Technology,2013.
|
| [28] |
高建良,李沙沙,杨 明,等. 水分对无烟煤瓦斯吸附影响的低场核磁试验研究[J]. 安全与环境学报,2018,18(1):151−155.
GAO Jianliang,LI Shasha,YANG Ming,et al. Low field NMR experimental study on the effect of water on anthracite gas adsorption[J]. Journal of Safety and Environment,2018,18(1):151−155.
|
| 1. |
郭晨，史康，秦勇，袁航，陈贞龙，高为，卢玲玲，李猴强，张旭阳，王祥，何红斌，张润涵. 基于排采数据的煤层气井排水—降压—产气有效性研究——以黔西织金区块为例. 煤炭科学技术. 2025(03): 370-384 .
 本站查看
|
Supported by: Beijing Renhe Information Technology Co., Ltd. 
DownLoad: