Changes in char reactivity due to char-oxygen and char-steam reactions using Victorian brown coal in a fixed-bed reactor

doi:10.1016/j.cjche.2014.09.044

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (1): 321-325.DOI: 10.1016/j.cjche.2014.09.044

• 研究简报 • 上一篇

Changes in char reactivity due to char-oxygen and char-steam reactions using Victorian brown coal in a fixed-bed reactor

Shu Zhang^1,2, Yonggang Luo¹, Chunzhu Li^1,3, Yonggang Wang²

1 Department of Chemical Engineering, Monash University, Clayton, VIC 3800, Australia;
2 School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, China;
3 Fuels and Energy Technology Institute, Curtin University of Technology, GPO Box U1987, Perth, WA 6845, Australia

收稿日期:2013-03-11 修回日期:2013-06-16 出版日期:2015-01-28 发布日期:2015-01-24
通讯作者: Shu Zhang
基金资助:
Support by the Victorian State Government under its Energy Technology Innovation Strategy programme and the 12th Five-Year Plan of National Science and Technology of China (2012BAA04B02).

Changes in char reactivity due to char-oxygen and char-steam reactions using Victorian brown coal in a fixed-bed reactor

Shu Zhang^1,2, Yonggang Luo¹, Chunzhu Li^1,3, Yonggang Wang²

1 Department of Chemical Engineering, Monash University, Clayton, VIC 3800, Australia;
2 School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, China;
3 Fuels and Energy Technology Institute, Curtin University of Technology, GPO Box U1987, Perth, WA 6845, Australia

Received:2013-03-11 Revised:2013-06-16 Online:2015-01-28 Published:2015-01-24
Contact: Shu Zhang
Supported by:
Support by the Victorian State Government under its Energy Technology Innovation Strategy programme and the 12th Five-Year Plan of National Science and Technology of China (2012BAA04B02).

摘要/Abstract

摘要： This study was to examine the influence of reactions of char-O₂ and char-steamon the char reactivity evolution. A newly-designed fixed-bed reactor was used to conduct gasification experiments using Victorian brown coal at 800 ℃. The chars prepared from the gasification experiments were then collected and subjected to reactivity characterisation (ex-situ reactivity) using TGA (thermogravimetric analyser) in air. The results indicate that the char reactivity from TGA was generally high when the char experienced intensive gasification reactions in 0.3% O₂ in the fixed-bed reactor. The addition of steaminto the gasification not only enhanced the char conversion significantly but also reduced the char reactivity dramatically. The curve shapes of the char reactivity with involvement of steam were very different from that with O₂ gasification, implying the importance of gasifying agents to char properties.

关键词: Brown coal, Gasifying agent, Char reactivity, Fixed-bed reactor

Abstract: This study was to examine the influence of reactions of char-O₂ and char-steamon the char reactivity evolution. A newly-designed fixed-bed reactor was used to conduct gasification experiments using Victorian brown coal at 800 ℃. The chars prepared from the gasification experiments were then collected and subjected to reactivity characterisation (ex-situ reactivity) using TGA (thermogravimetric analyser) in air. The results indicate that the char reactivity from TGA was generally high when the char experienced intensive gasification reactions in 0.3% O₂ in the fixed-bed reactor. The addition of steaminto the gasification not only enhanced the char conversion significantly but also reduced the char reactivity dramatically. The curve shapes of the char reactivity with involvement of steam were very different from that with O₂ gasification, implying the importance of gasifying agents to char properties.

Key words: Brown coal, Gasifying agent, Char reactivity, Fixed-bed reactor

Shu Zhang, Yonggang Luo, Chunzhu Li, Yonggang Wang . Changes in char reactivity due to char-oxygen and char-steam reactions using Victorian brown coal in a fixed-bed reactor[J]. Chinese Journal of Chemical Engineering, 2015, 23(1): 321-325.

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Changes in char reactivity due to char-oxygen and char-steam reactions using Victorian brown coal in a fixed-bed reactor

Changes in char reactivity due to char-oxygen and char-steam reactions using Victorian brown coal in a fixed-bed reactor

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