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Evolution of Micron-Scale Pore Structure and Connectivity of Lignite during Pyrolysis
Joint Authors
Zhao, Yangsheng
Meng, Qiaorong
Kang, Zhiqin
Wang, Yong
Gao, Li
Zhang, Yongfeng
Source
Advances in Materials Science and Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-04-10
Country of Publication
Egypt
No. of Pages
10
Abstract EN
Based on the high-precision microcomputed tomography (micro-CT) technology, the evolution of the μm-scale pore structure and connectivity of lignite during pyrolysis from room temperature to 600°C was studied.
The results show that the pore connectivity of lignite increases with the increase of temperature, and the change of pore structure can be divided into four stages: the first stage is from room temperature to 100°C, characterized by generation and connection of small-diameter pores.
The second stage is 100–200°C, characterized by rapid expansion and interconnection of pores due to the thermal cracking.
The third stage is from 200°C to 450°C, characterized by the slow evolution of pore structure for pyrolysis.
The fourth stage is from 450°C to 600°C, characterized by pore interconnection for pyrolysis.
200°C is the temperature at which the μm-scale pore structure of lignite changes dramatically.
During the whole pyrolysis process from room temperature to 600°C, the pore quantity of lignite is mainly from the pores of a diameter of 0.65–3 μm.
At 200°C and above, the pore volume of lignite is mainly from the pores with a diameter larger than 100 μm, but they are few.
These research results have important theoretical reference values for the upgrading and pyrolysis of lignite.
American Psychological Association (APA)
Meng, Qiaorong& Zhao, Yangsheng& Kang, Zhiqin& Wang, Yong& Gao, Li& Zhang, Yongfeng. 2020. Evolution of Micron-Scale Pore Structure and Connectivity of Lignite during Pyrolysis. Advances in Materials Science and Engineering،Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1129537
Modern Language Association (MLA)
Meng, Qiaorong…[et al.]. Evolution of Micron-Scale Pore Structure and Connectivity of Lignite during Pyrolysis. Advances in Materials Science and Engineering No. 2020 (2020), pp.1-10.
https://search.emarefa.net/detail/BIM-1129537
American Medical Association (AMA)
Meng, Qiaorong& Zhao, Yangsheng& Kang, Zhiqin& Wang, Yong& Gao, Li& Zhang, Yongfeng. Evolution of Micron-Scale Pore Structure and Connectivity of Lignite during Pyrolysis. Advances in Materials Science and Engineering. 2020. Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1129537
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1129537