Investigation on pore structures of a medium volatile bituminous coal with solvent extraction tests

Zhang, Xiaodong, Miao, Shulei, Wang, Geoff X., Qin, Yong and Sang, Shuxun (2013) Investigation on pore structures of a medium volatile bituminous coal with solvent extraction tests. Energy Exploration & Exploitation, 31 3: 337-351. doi:10.1260/0144-5987.31.3.337


Author Zhang, Xiaodong
Miao, Shulei
Wang, Geoff X.
Qin, Yong
Sang, Shuxun
Title Investigation on pore structures of a medium volatile bituminous coal with solvent extraction tests
Journal name Energy Exploration & Exploitation   Check publisher's open access policy
ISSN 0144-5987
2048-4054
Publication date 2013-06
Sub-type Article (original research)
DOI 10.1260/0144-5987.31.3.337
Volume 31
Issue 3
Start page 337
End page 351
Total pages 15
Place of publication United Kingdom
Publisher Multi-Science Publishing
Collection year 2014
Language eng
Formatted abstract
This paper presents an experimental investigation on the changes of pore structures, pore morphology of a medium volatile bituminous coal through solvent extraction under ultrasonic irradiation. The solvent extraction experiments, carried out using four non- or weak-polarity solvents with the twice- and thorough-extraction methods, provided a series of extract residues for comparison study on the coal pore structure with reference to the coal sample. Scanning electronic microscopy (SEM) and mercury injection porosimetry (MIP) were used to study the morphological and structural changes of pores both the coal samples and the residues. The results show that most solvable organic components can be extracted from coal through twice-extraction method with the solvents used in this study; under the ultrasonic irradiation, the solvent extraction makes the surfaces of coal particles grow loose and thus come to pieces forming many intergranular pores. And the numbers of intergranular pores have a tendency to increase as the extraction degree increases; the solvent extraction produced the "pore expansion" effect and increased opening pores, and hence can improve the connectivity among pores and make the pore distribution more uniform.
Keyword Medium volatile bituminous coal
Solvent extraction
Extraction yield
Pore structure
Pore morphology
Mercury porosimetry
Carbon-dioxide
Gas Content
Methane
Compressibility
Capacity
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2014 Collection
 
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