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Response of methane diffusion in varying degrees of deformed coals to different solvent treatments
Li, Pengpeng1,2,3,4; Zhang, Xiaodong1; Zhang, Shuo1
2018-12-10
发表期刊CURRENT SCIENCE
ISSN0011-3891
卷号115期号:11页码:2155-2161
摘要In the communication, we analysed four semianthracite coals with different degrees of deformation from the Huoerxinhe colliery in China that were extracted by tetrahydrofuran (THF) and carbon disulphide (CS2), and treated with hydrochloric acid (HCl) solution. Low-temperature nitrogen adsorption, water contact angle measurement and methane diffusion of untreated coals and their residues were carried out. As well, mineral composition of untreated coals and their residues treated with HCl are performed. Overall, compared with untreated coals, specific surface area has increased tendency after THF and CS2 extraction due to the removal of the soluble organic components in coal, depends jointly on mineral types and their respective content after HCl treatment. Regardless of coal un- or treated by solvents, diffusion coefficient grows with increasing coal deformation. Further study shows that the diffusion coefficient of coal with same deformation increases as follows: HCl treated coal residues, THF extracted coal residues, untreated coals, CS2 extracted coal residues. The aforementioned phenomena result from two aspects: on one hand, the enlargement of pore after solvent treatment reduces the collision between methane molecule and pore walls, thus improving the efficient of methane diffusion; on the other hand, pore is narrowed or even blocked completely due to the retention of foreign matters, which increases the resistance of methane diffusion. Therefore, methane diffusion after solvent treatment is jointly dependent on pore change because of the removal of soluble components and the retention of foreign matters.
关键词Deformed coal diffusion coefficient pore structure solvent treatment wettability
DOI10.18520/cs/v115/i11/2155-2161
资助者National Natural Science Foundation (NNSF) by National Natural Science Foundation of China ; National Natural Science Foundation (NNSF) by National Natural Science Foundation of China ; National Natural Science Foundation (NNSF) by National Natural Science Foundation of China ; National Natural Science Foundation (NNSF) by National Natural Science Foundation of China ; National Natural Science Foundation (NNSF) by National Natural Science Foundation of China ; National Natural Science Foundation (NNSF) by National Natural Science Foundation of China ; National Natural Science Foundation (NNSF) by National Natural Science Foundation of China ; National Natural Science Foundation (NNSF) by National Natural Science Foundation of China
关键词[WOS]PORE STRUCTURES ; GAS-DIFFUSION ; EXTRACTION ; ADSORPTION ; BEHAVIOR ; TRANSPORT ; MECHANISM ; MOISTURE ; IMPACT
语种英语
资助项目National Natural Science Foundation (NNSF) by National Natural Science Foundation of China[41372162]
资助者National Natural Science Foundation (NNSF) by National Natural Science Foundation of China ; National Natural Science Foundation (NNSF) by National Natural Science Foundation of China ; National Natural Science Foundation (NNSF) by National Natural Science Foundation of China ; National Natural Science Foundation (NNSF) by National Natural Science Foundation of China ; National Natural Science Foundation (NNSF) by National Natural Science Foundation of China ; National Natural Science Foundation (NNSF) by National Natural Science Foundation of China ; National Natural Science Foundation (NNSF) by National Natural Science Foundation of China ; National Natural Science Foundation (NNSF) by National Natural Science Foundation of China
WOS研究方向Science & Technology - Other Topics
WOS类目Multidisciplinary Sciences
WOS记录号WOS:000452542300034
出版者INDIAN ACAD SCIENCES
引用统计
文献类型期刊论文
条目标识符http://ir.iggcas.ac.cn/handle/132A11/90274
专题兰州油气中心
通讯作者Zhang, Xiaodong
作者单位1.Henan Polytech Univ, Sch Energy Sci & Engn, Jiaozuo 454000, Henan, Peoples R China
2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China
3.Chinese Acad Sci, Key Lab Petr Resources Gansu Prov, Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Li, Pengpeng,Zhang, Xiaodong,Zhang, Shuo. Response of methane diffusion in varying degrees of deformed coals to different solvent treatments[J]. CURRENT SCIENCE,2018,115(11):2155-2161.
APA Li, Pengpeng,Zhang, Xiaodong,&Zhang, Shuo.(2018).Response of methane diffusion in varying degrees of deformed coals to different solvent treatments.CURRENT SCIENCE,115(11),2155-2161.
MLA Li, Pengpeng,et al."Response of methane diffusion in varying degrees of deformed coals to different solvent treatments".CURRENT SCIENCE 115.11(2018):2155-2161.
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