Citation: Deng-pan LÜ, Yong-hui BAI, Jiao-fei WANG, Xu-dong SONG, Wei-guang SU, Guang-suo YU, he ZHU, Guang-jun TANG. Structural features and combustion reactivity of residual carbon in fine slag from entrained-flow gasification[J]. Journal of Fuel Chemistry and Technology, ;2021, 49(2): 129-136. doi: 10.1016/S1872-5813(21)60011-7 shu

Structural features and combustion reactivity of residual carbon in fine slag from entrained-flow gasification

1.
State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering, College of Chemistry and Chemical Engineering, College of Chemistry and Chemical Engineering Ningxia University, Yinchuan 750021, China
2.
Institute of Clean Coal Technology, East China University of Science and Technology, Shanghai 200237, China
3.
ShandongYankuangguotuo Science & Engineering Co., Ltd, Zoucheng 273500, China

Corresponding author: Yong-hui BAI, yhbai@nxu.edu.cn
Received Date: 24 September 2020
Revised Date: 10 November 2020

Figures(6)

The carbon content in fine slag during entrained-flow gasification is very high, at present, most of the fine slag was disposed by landfill. It is expected to provide a favorable technology by adding the fine slag to the circulating fluidized bed boilers to participate in combustion reaction. In this study, the gasification fine slags generated from GE, OMB and GSP gasifier, which are typical gasification processes in Ningdong energy and chemical base, was selected for investigation. The structural features and combustion reactivity of the residual carbon in the gasification fine slag were systematically studied by physical adsorption apparatus, laser Raman spectrum and thermogravimetric analyzer. The results showed that the materials in the original gasification fine slag could be divided into cohesive spherical particles, porous irregular particles and isolated large spherical particles, while the acid-washed gasification fine slag was mostly composed of loose fine particles and porous irregular massive particles. Additionally, the particle size of the residual carbon was clustered to 4–8 nm, and the specific surface area and active sites of that decreased orderly as follows: GE>OMB>GSP. The order degree of the residual carbon structure in GE slag was the lowest, and the amorphous carbon structure in it was the highest, while the case in GSP was the opposite. The combustion rate of the residual carbon in GE slag was the fastest, mainly due to its large specific surface area, more amorphous carbon structure and active site, and the comprehensive combustion index of residual carbon in GE slag was 5.26×10⁻⁷%²/(min²·^oC ³).
- fine slag,
- physic-chemical properties,
- structure characteristics,
- combustion characteristics
1. [1]
  ZHANG Lin-min, WANG Jiao-fei, BAI Yong-hui, SU Wei-guang, SONG Xu-dong, YU Guang-suo. In-situ study of Ningdong char particles gasification characteristics on the interface of ash layer and slag[J]. J Fuel Chem Technol,2020,48(2):129−136. doi: 10.3969/j.issn.0253-2409.2020.02.001
2. [2]
  WU T, GONG M, LESTER E, WANG F, ZHOU Z, YU Z. Characterisation of residual carbon from entrained-bed coal water slurry gasifiers[J]. Fuel,2007,86(7/8):972−982. doi: 10.1016/j.fuel.2006.09.033
3. [3]
  YANG Shuai, SHI Li-jun. Composition analysis of the fine slag from coal gasification and its comprehensive utilization[J]. Coal Chem Ind,2013,41(4):29−31. doi: 10.3969/j.issn.1005-9598.2013.04.009
4. [4]
  GUO, F, MIAO Z, GUO Z, LI J, ZHANG Y, WU J. Properties of flotation residual carbon from gasification fine slag[J]. Fuel,2020,267:117043. doi: 10.1016/j.fuel.2020.117043
5. [5]
  DU Jie, DAI Gao-feng, LI Shuai-shuai, WANG Xue-bin, SUN Xiao-wei, TAN Hou-zhang. Experimental study on the fundamental combustion characteristics of fine slag from gasification[J]. Clean Coal Technol,2019,25(2):83−88.
6. [6]
  WU S, HUANG S, JI L, WU Y, GAO J. Structure characteristics and gasification activity of residual carbon from entrained-flow coal gasification slag[J]. Fuel,2014,122:67−75. doi: 10.1016/j.fuel.2014.01.011
7. [7]
  ZHAO X, ZENG C, MAO Y, LI W, PENG Y, WANG T, EITENEER B, ZAMANSKY V, FLETCHER T. The surface characteristics and reactivity of residual carbon in coal gasification slag[J]. Energy Fuels,2010,24(1):91−94. doi: 10.1021/ef9005065
8. [8]
  XU S, ZHOU Z, GAO X, YU G, GONG X. The gasification reactivity of unburned carbon present in gasification slag from entrained-flow gasifier[J]. Fuel Process Technol,2009,90(9):1062−1070. doi: 10.1016/j.fuproc.2009.04.006
9. [9]
  HUANG S, WU S, WU Y, GAO J. Structure characteristics and gasification activity of residual carbon from updraft fixed-bed biomass gasification ash[J]. Energy Conver Manage,2017,136:108−118. doi: 10.1016/j.enconman.2016.12.091
10. [10]
  LUO hai-hua. Experimental research on combustion characteristics of fly ash residual carbon of CFB boiler[D]. Wuhan: Huazhong University of Science and Technology, 2007.
11. [11]
  DAI G, ZHENG S, WANG X, BAI Y, DONG Y, DU J, SUN X, TAN H. Combustibility analysis of high-carbon fine slags from an entrained flow gasifier[J]. J Environ Manage,2020,271:111009. doi: 10.1016/j.jenvman.2020.111009
12. [12]
  ZHANG X, BAI Y, WEI J, SONG X, WANG J, YAO M, YU G. Study on char-ash-slag-liquid transition and its effect on char reactivity[J]. Energy Fuels,2020,34(03):3941−3951. doi: 10.1021/acs.energyfuels.9b03155
13. [13]
  ZHANG L, WANG J, SONG X, BAI Y, YAO M, YU G. Influence of biomass ash additive on fusion characteristics of high-silicon-aluminum coal ash[J]. Fuel,2020,282:118876. doi: 10.1016/j.fuel.2020.118876
14. [14]
  SHUAI Hang, YI Hong-feng, YAUN Hu-die, CHEN Jin-xue. phase composition evolution and viscosity-temperature characteristics of gasification slags at High-temperature[J]. Coal Convers,2015,38(3):44−48. doi: 10.3969/j.issn.1004-4248.2015.03.010
15. [15]
  ZHANG Xin-sha, SONG Xu-dong, SU Wei-guang, WEI Jun-tao, BAI Yong-hui, YU Guang-suo. In-situ study on gasification reaction characteristics of Ningdong coal chars with CO₂[J]. J Fuel Chem Technol,2019,47(4):385−392. doi: 10.1016/S1872-5813(19)30018-0
16. [16]
  ZHAO Yong-bin, WU Hai-jun, ZHANG Xue-bin, LIU Hong-gang, JING Yun-huan, YUAN Wei. Fabrication of porous ceramic from coal gasification residual[J]. Clean Coal Technol,2016,22(5):7−11.
17. [17]
  SONG Rui-ling, LI Jing, FU Liang-liang, XU Yi, LAN Tian. Characteristics of slags generated from multi-nozzle opposed coal-water slurry gasifier[J]. Clean Coal Technol,2018,24(5):43−49.
18. [18]
  SHENG C. Char structure characterised by Raman spectroscopy and its correlations with combustion reactivity[J]. Fuel,2007,86(15):2316−2324. doi: 10.1016/j.fuel.2007.01.029
19. [19]
  JAWHARI T, ROID A, CASADO J. Raman spectroscopic characterization of some commercially available carbon black materials[J]. Carbon,1995,33(11):1561−1565. doi: 10.1016/0008-6223(95)00117-V
20. [20]
  DIPPEL B, JANDER H, HEINTZENBERG J. NIR FT Raman spectroscopic study of flame soot[J]. Phys Chem Chem Phys,1999,1:4707−12. doi: 10.1039/a904529e
21. [21]
  SFORNA M C, ZUILEN M A V, PHILIPPOT P. Structural characterization by Raman hyperspectral mapping of organic carbon in the 3.46 billion-year-old Apex chert, Western Australia[J]. Geochim Cosmochim Acta,2014,124(1):18−33.
22. [22]
  WU J, WANG B, CHENG F. Thermal and kinetic characteristics of combustion of coal sludge[J]. J Therm Anal Calorim,2017,129(3):1899−1909. doi: 10.1007/s10973-017-6341-1
23. [23]
  WANG X, LI S, ADEOSUN A, LI Y, VUJANOVIC M, TAN H, DUIC N. Effect of potassium-doping and oxygen concentration on soot oxidation in O₂/CO₂ atmosphere: A kinetics study by thermogravimetric analysis[J]. Energy Conver Manage,2017,149:686−697. doi: 10.1016/j.enconman.2017.01.003
24. [24]
  ZHOU Jun, ZHANG Hai, LV Jun-fu. Study on combustion characteristics of petroleum coke at different heating rates by using thermogravimetry[J]. Coal Convers,2006,29(2):39−43. doi: 10.3969/j.issn.1004-4248.2006.02.010
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