Citation: SHEN Tian, WANG Yong-gang, CHENG Xiang-long, LIN Xiong-chao. Activation and mechanism of chars from partial gasification of lignite at different steam concentrations[J]. Journal of Fuel Chemistry and Technology, ;2017, 45(5): 513-522. shu

Activation and mechanism of chars from partial gasification of lignite at different steam concentrations

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

Corresponding author: WANG Yong-gang, wyg1960@126.com
Received Date: 26 December 2016
Revised Date: 3 March 2017

Fund Project: The project was supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China 2012BAA04B02

Figures(10)

The char samples were prepared from the partial gasification of Shengli lignite in a fluidised-bed/fixed-bed reactor, and characterised by BET, Raman, FT-IR, microwave digestion ICP-AES, and TGA. The results indicate that at 800 ℃ and steam atmosphere the decomposition of ether group is made by the inherent char activation, leading to the decrease in the content of short chain or amorphous carbon between aromatic rings to prevent the graphitizing and the enhancement in the degree of defective aromatic structure. With the increasing of steam concentration (10%-25%) the char reactivity is reduced, which is attributed to the weakening of the regeneration of active sites by forming more ether group via the reaction "Ar, R-CO-Ar, R+2H₂O→Ar, R-O-Ar, R+2H₂+CO₂". However, with the continual increasing of steam concentration (25%-40%) the char reactivity is slightly promoted because the content of defective aromatic structure (3-5 rings) is increased due to the enhancement of the reaction (Ar, R-CH=CH₂+H₂O→Ar, R-CO-CH₃+H₂) and the reaction (Ar, R-+H-→Ar, R-H).
- lignite,
- fluidized-bed,
- active site,
- char structure
1. [1]
  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.
2. [2]
  XIE Ke-chang, WANG Yong-gang, LING Kai-cheng, LING Da-qi. Kinetics of CO₂ pressurised gasification of DongShan char[J]. J China Coal Soc, 1991,16(2):103-109.
3. [3]
  ZHU Zi-bin, MA Zhi-hua, LIN Shi-ying, Mitsuho Hirato, Masayuki Horio. Characteristics of coal char gasification at high temperature (Ⅱ): The effect of pore structure on coal char gasification[J]. CIESC J, 1994,45(2):155-161.
4. [4]
  RADOVIC L R, STECZKO K, WALKER P L, JENKINS R G. Combined effects of inorganic constituents and pyrolysis conditions on the gasification reactivity of coal chars[J]. Fuel Process Technol, 1985,10(3):311-326. doi: 10.1016/0378-3820(85)90038-4
5. [5]
  LIZZIO A A, JIANG H, RADOVIC L R. On the kinetics of carbon (char) gasification: Reconciling models with experiments[J]. Carbon, 1990,28(1):7-19. doi: 10.1016/0008-6223(90)90087-F
6. [6]
  LI X, HAYASHI J, LI C. Volatilisation and catalytic effects of alkali and alkaline earth metallic species during the pyrolysis and gasification of Victorian brown coal. Part Ⅶ. Raman spectroscopic study on the changes in char structure during the catalytic gasification in air[J]. Fuel, 2006,85(10/11):1509-1517.
7. [7]
  LI X, LI C. 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.
8. [8]
  LI 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, 2014,117:1190-1195. doi: 10.1016/j.fuel.2013.08.040
9. [9]
  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, 2013,103:22-28. doi: 10.1016/j.fuel.2011.02.044
10. [10]
  WANG Yong-gang, SUN Jia-liang, ZHANG Shu. Impacts of the gas atmosphere on the gasification reactivity and char structure of the brown coal[J]. J China Coal Soc, 2014,39(8):1765-1771.
11. [11]
  XU Xiu-Qiang, WANG Yong-gang, CHEN Guo-peng, CHEN Zong-ding, QIN Zhong-yu, DAI Jin-ze, ZHANG Shu, XU De-ping. Effects of steam on the reactivity and microstructure of char from in-situ gasification of brown coal[J]. J Fuel Chem Technol, 2015,43(5):546-553.
12. [12]
  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]. J Fuel Chem Technol, 2015,43(1):1-8.
13. [13]
  XIANG Yin-hua, WANG Yang, ZHANG Jian-min, ZHANG Shou-yu, FANG Yi-tian, DONG Zhong-bing. Kinetic on steam gasification of partially gasified char[J]. CIESC J, 2003,54(3):368-373.
14. [14]
  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.
15. [15]
  MIN Z, YIMSIRI P, ASADULLAH M, ZHANG S, LI C Z. Catalytic reforming of tar during gasification. Part Ⅱ. Char as a catalyst or as a catalyst support for tar reforming[J]. Fuel, 2011,90(7):2545-2552. doi: 10.1016/j.fuel.2011.03.027
16. [16]
  WU H, QUYN D M, LI C Z. Volatilisation and catalytic effects of alkali and alkaline earth metallic species during the pyrolysis and gasification of Victorian brown coal. Part Ⅲ. The importance of the interactions between volatiles and char at high temperature[J]. Dent Traumatol, 2002,81(8):1033-1039.
17. [17]
  ZHANG L X, HUANG J J, FANG Y T, WANG Y. Gasification reactivity and kinetics of typical chinese anthracite chars with steam and CO₂[J]. Energy Fuels, 2006,20(3):1201-1210. doi: 10.1021/ef050343o
18. [18]
  YE D P, AGNEW J B, ZHANG D K. Gasification of a South Australian low-rank coal with carbon dioxide and steam: Kinetics and reactivity studies[J]. Fuel, 1998,77(11):1209-1219. doi: 10.1016/S0016-2361(98)00014-3
19. [19]
  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. doi: 10.1016/j.fuel.2010.11.008
20. [20]
  CHEN W H, LIN B J. Hydrogen and synthesis gas production from activated carbon and steam via reusing carbon dioxide[J]. Appl Energy, 2013,101(1):551-559.
21. [21]
  ROMÁN S, GONZÁLEZ J F, GONZÁLEZ-GARCÍA C M, ZAMORA F. Control of pore development during CO₂ and steam activation of olive stones[J]. Fuel Process Technol, 2008,89(8):715-720. doi: 10.1016/j.fuproc.2007.12.015
22. [22]
  XIANG Yin-hua, WANG Yang, ZHANG Jian-min, DONG Zhong-bing, LI Bin. Study on structural properties and their affecting factors during gasificaiton of chars[J]. J Fuel Chem Technol, 2002,30(2):108-112.
23. [23]
  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, 2014,116:1-6. doi: 10.1016/j.fuel.2013.07.066
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