Citation: XU Xiu-qiang, WANG Yong-gang, CHEN Zong-ding, BAI Lei, ZHANG Kun-jun, YANG Sa-sha, ZHANG Shu. Influence of cooling treatments on char microstructure and reactivity of Shengli brown coal[J]. Journal of Fuel Chemistry and Technology, ;2015, 43(1): 1-8. shu

Influence of cooling treatments on char microstructure and reactivity of Shengli brown coal

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School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China

Corresponding author: WANG Yong-gang,
Received Date: 29 August 2014
Available Online: 19 November 2014
Fund Project: "十二五"国家科技支撑计划重点项目(2012BAA04B02). (2012BAA04B02)

This paper was to examine the changes in structure and reactivity of chars upon to varied cooling approaches for "hot" char derived from Shengli brown coal. The "hot" chars prepared from the pyrolysis of brown coal remained in argon for 30 min in a newly-designed two-stage quartz reactor at 400, 600 or 800 ℃, respectively. Subsequently, the "hot" chars were used to prepare the "cold" char by cooling at room temperature, dry ice and liquid nitrogen. The "cold" chars were then employed to the ex-situ gasification in 15% steam atmosphere at 900 ℃ for 10 min. For comparison, the in-situ gasification of "hot" char derived from the same pyrolysis without cooling was conducted by changing the reaction atmosphere from argon to 15% steam (under the same condition as the ex-situ gasification). Reactivity and physical-chemical structure of chars were characterized by TGA, SEM, BET and Raman spectroscope, respectively. Results showed that the yield of "hot" char in-situ gasification was lower than that of the "cold" char ex-situ gasification. Cooling approaches had the obvious influences on the porous structure of subsequent char. The specific surface areas and porous volumes were reduced dramatically with increasing quenching rate, but there was no significant effect on the chemical structure of char (such as aromatic ring systems and O-containing functional groups). In addition, the reactivity of "cold" chars was decreased with increasing cooling rate. The irreversible destroy of char structure, caused by the cooling treatment, contributed to the decrease of gasification reactivity of chars.
- brown coal,
- cooling treatment,
- newly-designed two-stage reactor,
- steam gasification,
- reactivity,
- microstructure
1. [1]
  [1] LI C Z. Some recent advances in the understanding of the pyrolysis and gasification behaviour of Victorian brown coal[J]. Fuel, 2007, 86(12/13): 1664-1683.
2. [2]
  [2] 刘辉, 吴少华, 孙锐, 徐睿, 邱朋华, 李可夫, 秦裕琨. 快速热解褐煤焦的比表面积及孔隙结构[J]. 中国机电工程学报, 2005, 25(12): 86-90.(LIU Hui, WU Shao-hua, SUN Rui, XU Rui, QIU Peng-hua, LI Ke-fu, QIN Yu-kun. Specific area and pore structure of lignite char under the condition of fast pyrolysis[J]. Proc CSEE, 2005, 25(12): 86-90.)
3. [3]
  [3] 沈强华, 刘云亮, 陈雯, 阴树标, 王勇, 何云龙. 昭通褐煤半焦气化特性的研究[J]. 煤炭转化, 2012, 35(1): 24-27.(SHEN Qiang-hua, LIU Yun-liang, CHEN Wen, YIN Shu-biao, WANG Yong, HE Yun-long. Study on gasification Character for Zhaotong lignite semi-coke[J]. Coal Convers, 2012, 35(1): 24-27.)
4. [4]
  [4] 王明敏, 张建胜, 张守玉, 吴晋沪, 岳光溪. 热解条件对煤焦结构及气化反应活性的影响[J]. 煤炭转化, 2007, 30(3): 21-24.(WANG Ming-min, ZHANG Jian-sheng, ZHANG Shou-yu, WU Jin-hu, YUE Guang-xi. Effect of pyrolysis conditions on the structure and gasification reactivity of char[J]. Coal Convers, 2007, 30(3): 21-24.)
5. [5]
  [5] JIA Q, CHE D F, LIU Y H, LIU Y H. Effect of the cooling and reheating during coal pyrolysis on the conversion from char-N to NO/N₂O[J]. Fuel Process Technol, 2009, 90(1): 8-15.
6. [6]
  [6] 景旭亮, 王志青, 余中亮, 房倚天. 半焦的多循环气化活性及微观结构分析[J]. 燃料化学学报, 2013, 41(8): 917-921.(JING Xu-liang, WANG Zhi-qing, YU Zhong-liang, FANG Yi-tian. Multi-circulated gasification reactivity of coal char and its microstructure analysis[J]. J Fuel Chem Technol, 2013, 41(8): 917-921.)
7. [7]
  [7] 刘殊远, 汪印, 武荣成, 曾玺, 许光文. 热态半焦和冷态半焦催化裂解煤焦油研究[J]. 燃料化学学报, 2013, 41(9): 1041-1049.(LIU Shu-yuan, WANG Yin, WU Rong-cheng, ZENG Xi, XU Guang-wen. Research on coal tar catalytic cracking over hot in-situ chars[J]. J Fuel Chem Technol, 2013, 41(9): 1041-1049.)
8. [8]
  [8] ATUL S, HAYATO K, TAKASHI K, AKIRA T. Effect of microstructural changes on gasification reactivity of coal chars during low temperature gasification[J]. Energy Fuels, 2002, 16(1): 54-61.
9. [9]
  [9] BO F, SURESH K B, JOHN C B. Structural ordering of coal char during heat treatment and its impact on reativity[J]. Carbon, 2002, 40(4): 482-496.
10. [10]
  [10] TAY H L, KAJITANI S, ZHANG S, LI C Z. Effects of gasifying agent on the evolution of char structure during the gasification of Victorian brown coal[J]. Fuel, 2013, 103(1): 22-28.
11. [11]
  [11] ZHANG S, HAYASHI J I, LI C Z. Volatilisation and catalytic effects of alkali and alkaline earth metallic species during the pyrolysis and gasification of Victorian brown coal. Part IX. Effects of volatile-char interactions on char-H₂O and char-O₂ reactivities[J]. Fuel, 2011, 90(4): 1655-1661.
12. [12]
  [12] TAY H L, LI C Z. Changes in char reactivity and structure during the gasification of a Victorian brown coal: Comparison between gasification in O₂ and CO₂[J]. Fuel Process Technol, 2010, 91(8): 800-804.
13. [13]
  [13] 林雄超, 王彩红, 田斌, 张书, 周剑林, 王永刚. 脱灰对两种烟煤半焦碳结构及CO₂气化反应性的影响[J]. 中国矿业大学学报, 2013, 42(6): 1040-1046.(LIN Xiong-chao, WANG Cai-hong, TIAN Bin, ZHANG Shu, ZHOU Jian-lin, WANG Yong-gang. Effects of de-ashing on the micro-structural transformation and CO₂ reactivity of two Chinese bituminous coal chars[J]. J Chin Univ Min Technol, 2013, 42(6): 1040-1046.)
14. [14]
  [14] ZHANG S, MIN Z H, TAY H L, WANG Y, DONG L, LI C Z. Changes in char structure during the gasification of Mallee wood: Effects of particle size and steam supply[J]. Energy Fuels, 2012, 26(1): 193-198.
15. [15]
  [15] 米建新. 胜利褐煤水蒸汽气化及焦炭反应性研究[D]. 北京: 中国矿业大学(北京), 2013.(MI Jian-xin. Study on char reactivity during Shengli lignite gasification in steam[D]. Beijing: China University of Mining and Technology (Beijing), 2013.)
16. [16]
  [16] 王乔力. 废旧轮胎的低温热解冷淬碎化的研究[D]. 天津: 天津大学, 2007.(WANG Qiao-li. Study on the fragmentation of waste tire by cold quenching after low temperature pyrolysis[D]. Tianjin: Tianjin University, 2007.)
17. [17]
  [17] 叶宏. 金属材料与热处理[M]. 北京: 化学工业出版社, 2009.(YE Hong. Metal heat treatment principles and process[M]. Beijing: Chemical Industry Press, 2009.)
18. [18]
  [18] LI X J, HAYASHI J I, LI C Z. FT-Raman spectroscopic study of the evolution of char structure during the pyrolysis of a Victorian brown coal[J]. Fuel, 2006, 85(12/13): 1700-1707.
19. [19]
  [19] ASADULLAH M, ZHANG S, MIN Z H, YIMSIRI P, LI C Z. Effects of biomass char structure on its gasification reactivity[J]. Bioresour Technol, 2010, 101(20): 7935-7943.
20. [20]
  [20] LI T T, ZHANG L, DONG L, LI C Z. Effects of gasification atmosphere and temperature on char structural evolution during the gasification of Collie sub-bituminous coal[J]. Fuel, 2014, 117(1): 1190-1195.
21. [21]
  [21] TAY H L, KAJITANI S, ZHANG S, LI C Z. Inhibiting and other effects of hydrogen during gasification: Further insights from FT-Raman spectroscopy[J]. Fuel, 2014, 116(15): 1-6.
22. [22]
  [22] LI X J, LI C Z. Volatilisation and catalytic effects of alkali and alkaline earth metallic species during the pyrolysis and gasification of Victorian brown coal. Part Ⅷ. Catalysis and changes in char structure during gasification in steam[J]. Fuel, 2006, 85(10/11): 1518-1525.
23. [23]
  [23] 李庆峰, 房倚天, 张建民, 王洋, 时铭显, 孙国刚. 气化活性与孔比表面积的关系[J]. 煤炭转化, 2003, 26(3): 45-48.(LI Qing-feng, FANG Yi-tian, ZHANG Jian-min, WANG Yang, SHI Ming-xian, SUN Guo-gang. Relationship of gasification activity and pore structure[J]. Coal Convers, 2003, 26(3): 45-48.)
24. [24]
  [24] 徐秀峰, 崔洪, 顾永达, 陈诵英, 吴东. 煤焦制备条件对其气化反应性的影响[J]. 燃料化学学报, 1996, 24(5): 404-410.(XU Xiu-feng, CUI Hong, GU Yong-da, CHEN Song-ying, WU Dong. Influence of charring conditions of coal chars on their gasification reactivity by air[J]. J Fuel Chem Technol, 1996, 24(5): 404-410.)
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