{"title":"Influence mechanism of alkaline solution on methane adsorption of coal","authors":"Zhou Yinbo, Wang Siqi, Zhao Zhou, Guan Pinpin, Xu Jingxin, Wu Jin-gang","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.04.005","DOIUrl":null,"url":null,"abstract":"In order to explore alkaline solution's enhancement on coal's chemical permeabilityꎬ 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 objectꎬ 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. Thenꎬ 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.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"17 1","pages":"28"},"PeriodicalIF":0.0000,"publicationDate":"2021-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"中国安全科学学报","FirstCategoryId":"1089","ListUrlMain":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.04.005","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
In order to explore alkaline solution's enhancement on coal's chemical permeabilityꎬ 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 objectꎬ 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. Thenꎬ 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.
为探讨碱性溶液对煤化学渗透性的增强作用ꎬ进行了孔隙试验和吸附试验，分析了碱性溶液对煤化学侵蚀效果及其对甲烷吸附能力的影响。以安徽青东煤矿为研究对象ꎬ采用低温液氮吸附法和等温吸附法对碱溶液处理前后样品的孔隙和甲烷容量特征进行了测试。然后用分形理论和吸附理论对ꎬ实验结果进行了定量讨论。结果表明:碱性溶液能有效改变煤的孔隙结构，增加孔径小于5 nm的微孔含量;煤样的吸附量大大提高，碱处理后的吸附量最大值从1783 mL / g增加到2197 mL / g。
期刊介绍：
China Safety Science Journal is administered by China Association for Science and Technology and sponsored by China Occupational Safety and Health Association (formerly China Society of Science and Technology for Labor Protection). It was first published on January 20, 1991 and was approved for public distribution at home and abroad.
China Safety Science Journal (CN 11-2865/X ISSN 1003-3033 CODEN ZAKXAM) is a monthly magazine, 12 issues a year, large 16 folo, the domestic price of each book is 40.00 yuan, the annual price is 480.00 yuan. Mailing code 82-454.
Honors:
Scopus database includes journals in the field of safety science of high-quality scientific journals classification catalog T1 level
National Chinese core journals China Science and technology core journals CSCD journals
The United States "Chemical Abstracts" search included the United States "Cambridge Scientific Abstracts: Materials Information" search included
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