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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
Source PublicationCURRENT SCIENCE
ISSN0011-3891
Volume115Issue:11Pages:2155-2161
AbstractIn 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.
KeywordDeformed coal diffusion coefficient pore structure solvent treatment wettability
DOI10.18520/cs/v115/i11/2155-2161
Funding OrganizationNational 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 KeywordPORE STRUCTURES ; GAS-DIFFUSION ; EXTRACTION ; ADSORPTION ; BEHAVIOR ; TRANSPORT ; MECHANISM ; MOISTURE ; IMPACT
Language英语
Funding ProjectNational Natural Science Foundation (NNSF) by National Natural Science Foundation of China[41372162]
Funding OrganizationNational 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 Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000452542300034
PublisherINDIAN ACAD SCIENCES
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90274
Collection兰州油气中心
Corresponding AuthorZhang, Xiaodong
Affiliation1.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
Recommended Citation
GB/T 7714
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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