Numerical analysis of 3-D microstructure of coke using micro X-ray CT

Kenichi Hiraki; Yoshiaki Yamazaki; Tetsuya Kanai; Ataru Uchida; Yasuhiro Saito; Yohsuke Matsushita; Hideyuki Aoki; Takatoshi Miura; Seiji Nomura; Hideyuki Hayashizaki

doi:10.2355/isijinternational.52.1966

Numerical analysis of 3-D microstructure of coke using micro X-ray CT

Kenichi Hiraki, Yoshiaki Yamazaki, Tetsuya Kanai, Ataru Uchida, Yasuhiro Saito, Yohsuke Matsushita, Hideyuki Aoki, Takatoshi Miura, Seiji Nomura, Hideyuki Hayashizaki

ENG - Chemical Engineering

Research output: Contribution to journal › Article

20 Citations (Scopus)

Abstract

A finite element model of coke was generated using micro X-ray CT, and coke strength was numerically evaluated using its microstructure. First, three-dimensional (3-D) and two-dimensional (2-D) stress analyses of coke were compared. Next, 3-D stress analyses of cokes produced from caking coal and slightly caking coal were conducted in order to investigate the effect of the 3-D microstructure on coke strength. Furthermore, the strength anisotropy of coke was evaluated by stress analyses assuming a uniaxial tensile test in three directions. We found that the maximum principal stress magnitude and stress concentration area are smaller in the 3-D stress analysis than in the 2-D stress analysis. Moreover, the stress concentration area and strength anisotropy of coke produced from slightly caking coal are larger than those of coke produced from caking coal. The results indicate that stress analysis based on micro X-ray CT images is very useful for investigating the relationship between coke microstructure and strength.

Original language	English
Pages (from-to)	1966-1972
Number of pages	7
Journal	Isij International
Volume	52
Issue number	11
DOIs	https://doi.org/10.2355/isijinternational.52.1966
Publication status	Published - 2012 Nov 27

Keywords

3-D analysis
Coke strength
Micro X-ray CT
Microstructure

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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Hiraki, K., Yamazaki, Y., Kanai, T., Uchida, A., Saito, Y., Matsushita, Y., Aoki, H., Miura, T., Nomura, S., & Hayashizaki, H. (2012). Numerical analysis of 3-D microstructure of coke using micro X-ray CT. Isij International, 52(11), 1966-1972. https://doi.org/10.2355/isijinternational.52.1966

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abstract = "A finite element model of coke was generated using micro X-ray CT, and coke strength was numerically evaluated using its microstructure. First, three-dimensional (3-D) and two-dimensional (2-D) stress analyses of coke were compared. Next, 3-D stress analyses of cokes produced from caking coal and slightly caking coal were conducted in order to investigate the effect of the 3-D microstructure on coke strength. Furthermore, the strength anisotropy of coke was evaluated by stress analyses assuming a uniaxial tensile test in three directions. We found that the maximum principal stress magnitude and stress concentration area are smaller in the 3-D stress analysis than in the 2-D stress analysis. Moreover, the stress concentration area and strength anisotropy of coke produced from slightly caking coal are larger than those of coke produced from caking coal. The results indicate that stress analysis based on micro X-ray CT images is very useful for investigating the relationship between coke microstructure and strength.",

keywords = "3-D analysis, Coke strength, Micro X-ray CT, Microstructure",

author = "Kenichi Hiraki and Yoshiaki Yamazaki and Tetsuya Kanai and Ataru Uchida and Yasuhiro Saito and Yohsuke Matsushita and Hideyuki Aoki and Takatoshi Miura and Seiji Nomura and Hideyuki Hayashizaki",

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AU - Hiraki, Kenichi

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AU - Saito, Yasuhiro

AU - Matsushita, Yohsuke

AU - Aoki, Hideyuki

AU - Miura, Takatoshi

AU - Nomura, Seiji

AU - Hayashizaki, Hideyuki

PY - 2012/11/27

Y1 - 2012/11/27

N2 - A finite element model of coke was generated using micro X-ray CT, and coke strength was numerically evaluated using its microstructure. First, three-dimensional (3-D) and two-dimensional (2-D) stress analyses of coke were compared. Next, 3-D stress analyses of cokes produced from caking coal and slightly caking coal were conducted in order to investigate the effect of the 3-D microstructure on coke strength. Furthermore, the strength anisotropy of coke was evaluated by stress analyses assuming a uniaxial tensile test in three directions. We found that the maximum principal stress magnitude and stress concentration area are smaller in the 3-D stress analysis than in the 2-D stress analysis. Moreover, the stress concentration area and strength anisotropy of coke produced from slightly caking coal are larger than those of coke produced from caking coal. The results indicate that stress analysis based on micro X-ray CT images is very useful for investigating the relationship between coke microstructure and strength.

AB - A finite element model of coke was generated using micro X-ray CT, and coke strength was numerically evaluated using its microstructure. First, three-dimensional (3-D) and two-dimensional (2-D) stress analyses of coke were compared. Next, 3-D stress analyses of cokes produced from caking coal and slightly caking coal were conducted in order to investigate the effect of the 3-D microstructure on coke strength. Furthermore, the strength anisotropy of coke was evaluated by stress analyses assuming a uniaxial tensile test in three directions. We found that the maximum principal stress magnitude and stress concentration area are smaller in the 3-D stress analysis than in the 2-D stress analysis. Moreover, the stress concentration area and strength anisotropy of coke produced from slightly caking coal are larger than those of coke produced from caking coal. The results indicate that stress analysis based on micro X-ray CT images is very useful for investigating the relationship between coke microstructure and strength.

KW - 3-D analysis

KW - Coke strength

KW - Micro X-ray CT

KW - Microstructure

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