Response of methane diffusion in varying degrees of deformed coals to different solvent treatments

doi:10.18520/cs/v115/i11/2155-2161

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 兰州油气中心

	Response of methane diffusion in varying degrees of deformed coals to different solvent treatments
	Li, Pengpeng 1,2,3,4; Zhang, Xiaodong 1; Zhang, Shuo 1
刊名	CURRENT SCIENCE
	2018-12-10
卷号	115 期号:11 页码:2155-2161
关键词	Deformed coal diffusion coefficient pore structure solvent treatment wettability
ISSN号	0011-3891
DOI	10.18520/cs/v115/i11/2155-2161
英文摘要	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.
资助项目	National Natural Science Foundation (NNSF) by National Natural Science Foundation of China[41372162]
WOS关键词	PORE STRUCTURES ; GAS-DIFFUSION ; EXTRACTION ; ADSORPTION ; BEHAVIOR ; TRANSPORT ; MECHANISM ; MOISTURE ; IMPACT
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	INDIAN ACAD SCIENCES
WOS记录号	WOS:000452542300034
资助机构	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
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/90274]
专题	地质与地球物理研究所_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
推荐引用方式 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.