SDBS与CaCl2复配液对煤体瓦斯解吸抑制效应研究

doi:10.16265/j.cnki.issn1003-3033.2019.11.024

中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (11): 149-155.doi: 10.16265/j.cnki.issn1003-3033.2019.11.024

SDBS与CaCl₂复配液对煤体瓦斯解吸抑制效应研究

林海飞^1,2 教授, 田佳敏^1,2, 刘丹³, 严敏^1,2 讲师, 丁洋^1,2 讲师

1 西安科技大学安全科学与工程学院,陕西西安 710054;
2 教育部西部矿井开采及灾害防治重点实验室,陕西西安 710054;
3 中交二公局第三工程有限公司,陕西西安 710061

收稿日期:2019-08-17 修回日期:2019-10-14 发布日期:2020-10-30
作者简介:林海飞 (1979—),男,山西天镇人,博士,教授,主要从事矿井瓦斯防治方面的研究。E-mail:lhaifei@163.com。
基金资助:
国家自然科学基金重点项目资助(51734007);国家自然科学基金资助(51674192,51604219,51874236)。

Inhibitory effect of SDBS and CaCl₂ compound solution on gas desorption of coal

LIN Haifei^1,2, TIAN Jiamin^1,2, LIU Dan³, YAN Min^1,2, DING Yang^1,2

1 College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an Shaanxi 710054,China;
2 Key Laboratory of Western Mine Exploitation and Hazard Prevention, Ministry of Education, Xi'an University of Science and Technology, Xi'an Shaanxi 710054,China;
3 China Communications Second Public Administration Third Engineering Co., Ltd., Xi'an Shaanxi 710061, China

Received:2019-08-17 Revised:2019-10-14 Published:2020-10-30

摘要/Abstract

摘要： 为研究表面活性剂十二烷基苯磺酸钠(SDBS)与CaCl₂复配液对煤体瓦斯解吸的抑制效应,选用新疆硫磺沟4—5号煤层煤样,采用HCA高压吸附解吸装置,测定干燥煤样、纯水、质量浓度2.5×10^-2 g/mLSDBS及SDBS与CaCl₂复配液浸泡后煤样瓦斯解吸参数。研究表明:SDBS与CaCl₂复配液有效降低纯水的表面张力、煤样接触角,当质量浓度为2.5×10^-2g/mL的SDBS溶液与质量浓度为2.5×10^-2 g/mL的CaCl₂溶液体积比为1∶3时,溶液表面张力降低至24.22 mN/m,煤样接触角降低至15.175 °;随解吸时间增加,煤体瓦斯解吸量呈Langmuir关系逐渐增大后趋于稳定,瓦斯解吸速率迅速减小,当CaCl₂质量浓度为1.875×10^-2 g/mL时,最大瓦斯解吸量为0.24 mL/g,最大解吸速率为0.8×10^-2 mL/(g·s),对瓦斯解吸量及解吸速率的抑制效率最高。

关键词: 表面活性剂, 复配液, 润湿性, 瓦斯解吸特性, 抑制效率

Abstract: In order to study the inhibitory effect of surfactant sodium dodecylbenzene sulfonate (SDBS) and CaCl₂ compound solution on the gas desorption of coal, coal samples from No. 4-5 coal seam in Xinjiang Sulfur Ditch were selected and HCA high pressure adsorption and desorption device was used to determine gas desorption parameters of dry coal sample, pure water, 2.5×10^-2g/mL SDBS, and coal samples soaked in SDBS and CaCl₂ mixed solution. The results show that SDBS and CaCl₂ compound solution can effectively reduce the surface tension of pure water and the contact angle of coal samples, that when the mass concentration of 2.5×10^-2 g/mL SDBS solution and the mass concentration of 2.5×10^-2 g/mL CaCl₂ solution are 1∶3, the surface tension of the solution is reduced to 24.22 mN/m, and the contact angle of coal samples is reduced to 15.175 °, that with the increase of desorption time, the gas desorption amount of coal body gradually increases in the Langmuir relationship and then stabilizes while the gas desorption rate decreases rapidly, and that when the mass concentration of CaCl₂ in mixed solution is 1.875×10^-2g/mL, the maximum gas desorption amount is 0.24 mL/g, the maximum desorption rate is 0.8×10^-2mL/(g·s), and the suppression efficiency is the highest.

Key words: surfactant, compound solution, wettability, gas desorption characteristic, inhibition efficiency

中图分类号:

X936

林海飞, 田佳敏, 刘丹, 严敏, 丁洋. SDBS与CaCl₂复配液对煤体瓦斯解吸抑制效应研究[J]. 中国安全科学学报, 2019, 29(11): 149-155.

LIN Haifei, TIAN Jiamin, LIU Dan, YAN Min, DING Yang. Inhibitory effect of SDBS and CaCl₂ compound solution on gas desorption of coal[J]. China Safety Science Journal, 2019, 29(11): 149-155.

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SDBS与CaCl₂复配液对煤体瓦斯解吸抑制效应研究

Inhibitory effect of SDBS and CaCl₂ compound solution on gas desorption of coal

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