Pore structure characterization of coal by synchrotron radiation nano-CT

Zhao, Yixin, Sun, Yingfeng, Liu, Shimin, Chen, Zhongwei and Yuan, Liang (2018) Pore structure characterization of coal by synchrotron radiation nano-CT. Fuel, 215 102-110. doi:10.1016/j.fuel.2017.11.014

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Author Zhao, Yixin
Sun, Yingfeng
Liu, Shimin
Chen, Zhongwei
Yuan, Liang
Title Pore structure characterization of coal by synchrotron radiation nano-CT
Journal name Fuel   Check publisher's open access policy
ISSN 0016-2361
Publication date 2018-03-01
Year available 2017
Sub-type Article (original research)
DOI 10.1016/j.fuel.2017.11.014
Open Access Status Not yet assessed
Volume 215
Start page 102
End page 110
Total pages 9
Place of publication Oxford, United Kingdom
Publisher Elsevier
Language eng
Subject 1500 Chemical Engineering
2103 Fuel Technology
2102 Energy Engineering and Power Technology
1605 Organic Chemistry
Abstract For the significant impact of pore structure on gas storage and transport in coal seams, research on coal pore structure characterization has been a hotspot. Benefited from the high spatial resolution synchrotron-based nano-CT instrument, pore structure characterization of coal is investigated in nano scale. Image alignment and 3D reconstruction were completed at the platform designed by National Synchrotron Radiation Laboratory and Chinese Academy of Sciences. The segmentation of the unimodal grey-scale value histograms is solved by Between-class Variance Maximisation (BCVM) algorithm and the nano-CT images are segmented into three components, pore, organic components and mineral components. Based on the voxel number, components fraction is computed. Pore size distribution (PSD) presents bimodality. Pores with equivalent radius less than 60 nm account for 84% of the total pore number. Throats with equivalent radius less than 60 nm account for 89% of the total throat number. Throats with length less than 100 nm account for 58% of the total throat number and throats with length less than 400 nm account for 84% of the total throat number. Pore number decreases with the increase of coordination number. There are over 50% of pores without coordination pore and pore connectivity was analysed. Nanopore structure-based computational fluid dynamics (CFD) simulation was explored. The permeability in three coordinate axes directions presents anisotropy.
Keyword Synchrotron radiation nano-CT
Pore structure
Nanopore structure-based CFD simulation
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 51174213
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
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Created: Tue, 14 Nov 2017, 09:41:52 EST by Zhongwei Chen on behalf of School of Mechanical and Mining Engineering