The crystalline and microstructural transformations of two coal ashes and their quenched slags with similar chemical compositions during heat treatment

Yong Jiang; Keiko Ideta; Jandee Kim; Jin Miyawaki; Doo Hwan Jung; Seong Ho Yoon; Isao Mochida

doi:10.1016/j.jiec.2014.06.031

The crystalline and microstructural transformations of two coal ashes and their quenched slags with similar chemical compositions during heat treatment

Yong Jiang, Keiko Ideta, Jandee Kim, Jin Miyawaki, Doo Hwan Jung, Seong Ho Yoon, Isao Mochida

Department of Advanced Device Materials

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

The crystalline and microstructural transformations of two laboratory ashes and their quenched slags (from a gasifier) with similar chemical compositions [one with high silicon dioxide (SiO₂) concentrations and the other with high aluminum oxide (Al₂O₃) concentrations] were systematically characterized using X-ray diffraction, multinuclear solid-state nuclear magnetic resonance, and a high-temperature viscometer. The results show that the content of SiO₂ and Al₂O₃ in ash has significant influence on the crystal types and size of cristobalite clusters in the liquid slag during heat treatment. Consequently, the formed cristobalite clusters were crucial to the viscosities and rheological properties of liquid slags.

Original language	English
Pages (from-to)	110-119
Number of pages	10
Journal	Journal of Industrial and Engineering Chemistry
Volume	22
DOIs	https://doi.org/10.1016/j.jiec.2014.06.031
Publication status	Published - Feb 25 2015

All Science Journal Classification (ASJC) codes

Chemical Engineering(all)

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10.1016/j.jiec.2014.06.031

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The crystalline and microstructural transformations of two coal ashes and their quenched slags with similar chemical compositions during heat treatment. / Jiang, Yong; Ideta, Keiko; Kim, Jandee; Miyawaki, Jin; Jung, Doo Hwan; Yoon, Seong Ho; Mochida, Isao.

In: Journal of Industrial and Engineering Chemistry, Vol. 22, 25.02.2015, p. 110-119.

Research output: Contribution to journal › Article › peer-review

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abstract = "The crystalline and microstructural transformations of two laboratory ashes and their quenched slags (from a gasifier) with similar chemical compositions [one with high silicon dioxide (SiO2) concentrations and the other with high aluminum oxide (Al2O3) concentrations] were systematically characterized using X-ray diffraction, multinuclear solid-state nuclear magnetic resonance, and a high-temperature viscometer. The results show that the content of SiO2 and Al2O3 in ash has significant influence on the crystal types and size of cristobalite clusters in the liquid slag during heat treatment. Consequently, the formed cristobalite clusters were crucial to the viscosities and rheological properties of liquid slags.",

author = "Yong Jiang and Keiko Ideta and Jandee Kim and Jin Miyawaki and Jung, {Doo Hwan} and Yoon, {Seong Ho} and Isao Mochida",

note = "Funding Information: This work was supported by the New Energy and Industrial Technology Development Organisation (NEDO), the Global Center of Excellence (G-COE) of Kyushu University, and the J-Power Company .",

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AU - Jiang, Yong

AU - Ideta, Keiko

AU - Kim, Jandee

AU - Miyawaki, Jin

AU - Jung, Doo Hwan

AU - Yoon, Seong Ho

AU - Mochida, Isao

N1 - Funding Information: This work was supported by the New Energy and Industrial Technology Development Organisation (NEDO), the Global Center of Excellence (G-COE) of Kyushu University, and the J-Power Company .

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