SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2015, Vol. 23 ›› Issue (1): 321-325.DOI: 10.1016/j.cjche.2014.09.044

• RESEARCH NOTES • Previous Articles    

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

Shu Zhang1,2, Yonggang Luo1, Chunzhu Li1,3, Yonggang Wang2   

  1. 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:2015-01-24 Published:2015-01-28
  • 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).

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

Shu Zhang1,2, Yonggang Luo1, Chunzhu Li1,3, Yonggang Wang2   

  1. 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
  • 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).

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

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