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

Shu Zhang; Yonggang Luo; Chunzhu Li; Yonggang Wang

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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

研究简报 | Updated：2026-01-06

- Changes in char reactivity due to char-oxygen and char-steam reactions using Victorian brown coal in a fixed-bed reactor
- Chinese Journal of Chemical Engineering Vol. 23, Issue 1, Pages: 321-325(2015)
- Affiliations：
  
  1. 2 School of Chemical and Environmental Engineering, China University of Mining and Technology,Beijing,China,100083
  2. 3 Fuels and Energy Technology Institute, Curtin University of Technology, GPO Box U1987,WA,Perth,Australia,6845
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2015
- Accepted：
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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]. Chin.J.Chem.Eng., 2015, 23(1): 321-325.
DOI：

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]. Chin.J.Chem.Eng., 2015, 23(1): 321-325. DOI：

摘要

Abstract

This study was to examine the influence of reactions of char-O

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% O

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 O

gasification

implying the importance of gasifying agents to char properties.

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