Citation: Hao-dong WU, Feng-hua SHAO, Peng LÜ, Yong-hui BAI, Xu-dong SONG, Jiao-fei WANG, Qing-hua GUO, Xue-bin WANG, Guang-suo YU. Study on the relationship between structure, properties and size distribution of fine slag from entrained flow gasification[J]. Journal of Fuel Chemistry and Technology, ;2022, 50(5): 513-522. doi: 10.19906/j.cnki.JFCT.2021089 shu

Study on the relationship between structure, properties and size distribution of fine slag from entrained flow gasification

Hao-dong WU ^{1, #,} ,
Feng-hua SHAO ¹ ,
Peng LÜ ¹ ,
Yong-hui BAI ^1,, ,
Xu-dong SONG ¹ ,
Jiao-fei WANG ¹ ,
Qing-hua GUO ^{1, 2} ,
Xue-bin WANG ³ ,
Guang-suo YU ^{1, 2}

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.
School of Energy and Power Engineering, Xi'an Jiao tong University, Xi'an 710049, China

Corresponding author: Yong-hui BAI, yhbai@nxu.edu.cn
Received Date: 28 September 2021
Revised Date: 2 November 2021
Accepted Date: 3 November 2021
Available Online: 8 June 2022

Figures(10)

In the process of gasification for different size of coal particles, there are remarkable differences in the cracking mode, behavior of volatile removal and coke-slag interaction. These differences lead to the discrepancies in structural characteristics and reaction behavior for fine slag. Therefore, it is considered that the study on relationship between structure, properties and size distribution of fine slag from entrained flow gasification can provide vital guidance for analyzing the formation mechanism of fine slag and optimizing the size of coal particles for gasification. For this purpose, the fine slag from Ningdong typical GSP technology in Ningxia Province was selected as a raw material. After drying, crushing and sieving, three kinds of samples with size of <0.125, 0.125–0.250 and >0.250 mm were prepared, and called small, medium and large size samples respectively. The nitrogen adsorption, XRD, Raman spectroscopy and TGA were applied to clarify the physicochemical structure and combustion reactivity of samples. It is found that there are huge differences in the composition, structure or reactivity of the samples in different size. Precisely, three types of samples account for 22%, 46%, and 32% respectively. All the fine slag contains a large number of spherical particles and irregular particles. The sample with the middle size particles, which has the most content of residual carbon (19%) and the lowest graphitization degree (30%), shows the slightest gasification degree. It also presents the largest specific surface area (87.8 m²/g), and the optimal combustibility index regardless of the heating rate. While, the above properties of the sample with large size particles are completely opposite. Apparently, coal gasified sufficiently tends to form fine slag in large particle size, while coal gasified insufficiently is more likely to form slag in middle particle size. To some degree, all these findings can supply a certain basis to the study of gasification process. Meanwhile, the medium-sized fine slag with the most content in fine slag has low gasification degree, large content of carbon, and large specific surface area and porosity, which still has a certain potential utilization value for the treatment and disposal of the fine slag.
- coal gasification,
- fine slag,
- size distribution of particle,
- combustion reactivity,
- microstructure
1. [1]
  ZHU Zi-qi. Migration rule of coal macerals in coal-to-oil preparation plant[J]. Clean Coal Technol,2020,26(6):89−95.
2. [2]
  ZHANG Y X, WU J J, WANG Y, MIAO Z Y, SI C D, SHANG X L, ZHANG N. Effect of hydrothermal dewatering on the physico-chemical structure and surface properties of Shengli lignite[J]. Fuel,2016,164:128−133.
3. [3]
  WANG Xue-bin, YU Wei, ZHANG Tao, BAI Yong-hui, LIU Li-jun, SHI Zhao-chen, YIN Rui, TAN Hou-zhang. Characteristic analysis and utilization of coal gasification fine slag based on particle size classification[J]. Clean Coal Technol,2021,27(3):61−69.
4. [4]
  ZHAO D Y, LUN W J, WEI J J. Discussion on wastewater treatment process of coal chemical industry[J]. Iop Conference,2017,100:012067.
5. [5]
  KATO K, MATSUEDA K. Leading edge of coal utilization technologies for gasification and cokemaking[J]. Kona Powder Part J,2017,2018:112−121.
6. [6]
  WU S Y, HUANG S, JI L Y, WU Y Q, GAO J S. 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]
  LIU Dong-xue, HU Jun-yang, FENG Qi-ming, HUANG Yang, XU Zhong-hui. Study on flotation of coal gasification slag and preparation of activated carbon from carbon concentrate[J]. Coal Convers,2018,(5):73−80. doi: 10.3969/j.issn.1004-4248.2018.05.012
8. [8]
  CHEN Qing-ru, Clean coal energy in the 21st century[C]//Proceedings of the Symposium on developing clean coal technology and improving the competitiveness of coal enterprises. Beijing: CCS, 2001: 5.
9. [9]
  GUO F H, MIAO Z K, GUO Z K, LI J, ZHANG Y X, WU J J. Properties of flotation residual carbon from gasification fine slag[J]. Fuel,2020,267:117043. doi: 10.1016/j.fuel.2020.117043
10. [10]
  WANG Lun, LI Han-xu, ZHAO Shuai, XIA Bao-liang, HUANG Jun. Residual carbon forms and combustion characteristics of gasification fine slag with different particle sizes[J/OL]. Coal Conversion: 1-10[2021-08-05]. http://kns.cnki.net/kcms/detail/14.1163.TQ.20210517.1448.004.html.
11. [11]
  SHI Zhao-chen, DAI Gao-feng, WANG Xue-bin, DONG Yong-sheng, LI Pan, YU Wei, TAN Hou-zhang. Review on the comprehensive resources utilization technology of coal gasification fine slag[J]. Huadian Technol,2020,42(7):63−73. doi: 10.3969/j.issn.1674-1951.2020.07.009
12. [12]
  ZHANG Ting, YU Lu, LI Yu, GAO Yan-peng, LIU Le, YI Han-ping, ZHANG Xian. Characteristic analysis andapplication discussion of coal water slurry gasifier slag[J]. Mod Chem Res,2020,(19):88−90. doi: 10.3969/j.issn.1672-8114.2020.19.039
13. [13]
  YANG L, ZHU Z, LI D L, YAN X K, ZHANG H J. Effects of particle size on the flotation behavior of coal fly ash[J]. Waste Manage,2019,85:490−497.
14. [14]
  LU Deng-pan, BAI Yong-hui, WANG Jiao-fei, SONG Xu-dong, SU Wei-guang, YU Guang-suo, ZHU he, TANG Guang-jun. Structural features and combustion reactivity of residual carbon in fine slag from entrained-flow gasification[J]. J Fuel Chem Technol,2021,49(2):129−136. doi: 10.1016/S1872-5813(21)60011-7
15. [15]
  TANG Y. Preparation of Sialon powder from coal gasification slag[J]. J Wuhan Univ Technol-Mat Sci Edit,2010,25(6):1044−1046.
16. [16]
  LI S H, WHITTY K J. Physical phenomena of char-slag transition in pulverized coal gasification[J]. Fuel Process Technol,2012,95:127−136. doi: 10.1016/j.fuproc.2011.12.006
17. [17]
  XU S Q, ZHOU Z J, GAO X X, YU G S, 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
18. [18]
  CANGIALOSI F, CANIO F D, INTINI G. Experimental and theoretical investigation on unburned coal char burnout in a pilot-scale rotary kiln[J]. Fuel,2006,85(16):2294−2300. doi: 10.1016/j.fuel.2006.01.031
19. [19]
  SENNECA O, RUSSO P, SALATINO P, MASI S. The relevance of thermal annealing to the evolution of coal char gasification reactivity[J]. Carbon,1997,35(1):141−151. doi: 10.1016/S0008-6223(96)00134-0
20. [20]
  WAGNER N J, MATJIE R H, SLAGHUIS J H, VAN HEERDEN J H P. Characterization of unburned carbon present in coarse gasification ash[J]. Fuel,2008,87(6):683−691. doi: 10.1016/j.fuel.2007.05.022
21. [21]
  YANG Y B, CHU M, SHI X, LYU F Y, SUN X B, JIA C X. Grading characteristics of texaco gasification fine slag: Quality distinction and selective distribution of trace elements[J]. ACS Omega,2020,41(5):26883−26893. doi: 10.1021/acsomega.0c04126
22. [22]
  PAN C C, LIANG Q F, GUO X L, DAI Z H, LIU H F, GONG X. Characteristics of different sized slag particles from entrained-flow coal gasification[J]. Energy Fuels,2016,30(2):1487−1495. doi: 10.1021/acs.energyfuels.5b01326
23. [23]
  LIN Q, GUET J M. Characterization of coals and macerais by X-ray diffraction[J]. Fuel,1990,69(7):821−825. doi: 10.1016/0016-2361(90)90224-E
24. [24]
  JAWHANi 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
25. [25]
  DIPPEL B, JANDER H, HEINTZENBERG J. NIR FT Raman spectroscopic study of Name soot[J]. Phys Chem Chem Phys,1999,1:4707−4712. doi: 10.1039/a904529e
26. [26]
  SFOMA M C, ZUILEN M 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.
27. [27]
  WU J Z, WANG B F, CHENG F Q. 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
28. [28]
  WANG X B, LI S S, ADEOSUN A, LI Y, VUJANOVIC, M;TAN H Z;DUIC, N. Effect of potassium-doping and oxygen concentration on soot oxidation in O₂/CO₂ atmosphere: A kinetics study by thermogravimetric analysis[J]. Energy Conv Manag,2017,149:686−697. doi: 10.1016/j.enconman.2017.01.003
29. [29]
  GE Qing-ren. Gas Solid Reaction Kinetics[M]. Beijing: Atomic Energy Press, 1991: 46−50.
30. [30]
  LIANG Ai-yun, HUI Shi-en, XU Tong-mo, ZHAO Qin-xin, ZHOU Qu-lan, TAN Hou-zhang, SUN Peng. TG-DTG analysis and combustion kinetics characteristic study on several kinds of biomass[J]. Renewable Energy Resour,2008,26(4):56−61. doi: 10.3969/j.issn.1671-5292.2008.04.014
1. [1]
  Baitong Wei , Jinxin Guo , Xigong Liu , Rongxiu Zhu , Lei Liu . Theoretical Study on the Structure, Stability of Hydrocarbon Free Radicals and Selectivity of Alkane Chlorination Reaction. University Chemistry, 2025, 40(3): 402-407. doi: 10.12461/PKU.DXHX202406003
2. [2]
  Zhi Chai , Huashan Huang , Xukai Shi , Yujing Lan , Zhentao Yuan , Hong Yan . Wittig反应的立体选择性. University Chemistry, 2025, 40(8): 192-201. doi: 10.12461/PKU.DXHX202410046
3. [3]
  Pei Li , Yuenan Zheng , Zhankai Liu , An-Hui Lu . Boron-Containing MFI Zeolite: Microstructure Control and Its Performance of Propane Oxidative Dehydrogenation. Acta Physico-Chimica Sinica, 2025, 41(4): 2406012-0. doi: 10.3866/PKU.WHXB202406012
4. [4]
  Yuting Zhang , Zhiqian Wang . Methods and Case Studies for In-Depth Learning of the Aldol Reaction Based on Its Reversible Nature. University Chemistry, 2024, 39(7): 377-380. doi: 10.3866/PKU.DXHX202311037
5. [5]
  Yufan ZHAO , Jinglin YOU , Shixiang WANG , Guopeng LIU , Xiang XIA , Yingfang XIE , Meiqin SHENG , Feiyan XU , Kai TANG , Liming LU . Raman spectroscopic quantitative study of the melt microstructure in binary Li₂O-GeO₂ functional crystals. Chinese Journal of Inorganic Chemistry, 2025, 41(8): 1533-1544. doi: 10.11862/CJIC.20250063
6. [6]
  Houzhen Xiao , Mingyu Wang , Yong Liu , Bangsheng Lao , Lingbin Lu , Minghuai Yu . Course Ideological and Political Design of Combustion Heat Measurement Experiment. University Chemistry, 2024, 39(2): 7-13. doi: 10.3866/PKU.DXHX202310011
7. [7]
  Renxiao Liang , Zhe Zhong , Zhangling Jin , Lijuan Shi , Yixia Jia . A Palladium/Chiral Phosphoric Acid Relay Catalysis for the One-Pot Three-Step Synthesis of Chiral Tetrahydroquinoline. University Chemistry, 2024, 39(5): 209-217. doi: 10.3866/PKU.DXHX202311024
8. [8]
  Jiaqi AN , Yunle LIU , Jianxuan SHANG , Yan GUO , Ce LIU , Fanlong ZENG , Anyang LI , Wenyuan WANG . Reactivity of extremely bulky silylaminogermylene chloride and bonding analysis of a cubic tetragermylene. Chinese Journal of Inorganic Chemistry, 2024, 40(8): 1511-1518. doi: 10.11862/CJIC.20240072
9. [9]
  Ke QIAO , Yanlin LI , Shengli HUANG , Guoyu YANG . Advancements in asymmetric catalysis employing chiral iridium (ruthenium) complexes. Chinese Journal of Inorganic Chemistry, 2024, 40(11): 2091-2104. doi: 10.11862/CJIC.20240265
10. [10]
  Zihao Guo , Shichen Ma , Kin Shing Chan . 烯烃环化反应中6电子试剂的等瓣相似性和等电子关系. University Chemistry, 2025, 40(6): 160-166. doi: 10.12461/PKU.DXHX202408038
11. [11]
  Anbang Du , Yuanfan Wang , Zhihong Wei , Dongxu Zhang , Li Li , Weiqing Yang , Qianlu Sun , Lili Zhao , Weigao Xu , Yuxi Tian . Photothermal Microscopy of Graphene Flakes with Different Thicknesses. Acta Physico-Chimica Sinica, 2024, 40(5): 2304027-0. doi: 10.3866/PKU.WHXB202304027
12. [12]
  Yaping Li , Sai An , Aiqing Cao , Shilong Li , Ming Lei . The Application of Molecular Simulation Software in Structural Chemistry Education: First-Principles Calculation of NiFe Layered Double Hydroxide. University Chemistry, 2025, 40(3): 160-170. doi: 10.12461/PKU.DXHX202405185
13. [13]
  Ximeng CHI , Jianwei WEI , Yunyun WANG , Wenxin DENG , Jiayi DAI , Xu ZHOU . First-principles study of the electronic structure and optical properties of Au and I doped-inorganic lead-free double perovskite Cs₂NaBiCl₆. Chinese Journal of Inorganic Chemistry, 2025, 41(7): 1371-1379. doi: 10.11862/CJIC.20240401
14. [14]
  Linfeng Xiao , Wanlu Ren , Shishi Shen , Mengshan Chen , Runhua Liao , Yingtang Zhou , Xibao Li . Enhancing Photocatalytic Hydrogen Evolution through Electronic Structure and Wettability Adjustment of ZnIn₂S₄/Bi₂O₃ S-Scheme Heterojunction. Acta Physico-Chimica Sinica, 2024, 40(8): 2308036-0. doi: 10.3866/PKU.WHXB202308036
15. [15]
  Shuyong Zhang , Yaxian Zhu , Wenqing Zhang , Yuzhi Wang , Jing Lu . Ideological and Political Design of Combustion Heat Measurement Experiment: Determination of Heat Value of Agricultural and Forestry Wastes. University Chemistry, 2024, 39(2): 1-6. doi: 10.3866/PKU.DXHX202303026
16. [16]
  Yinuo Wang , Siran Wang , Yilong Zhao , Dazhen Xu . Selective Synthesis of Diarylmethyl Anilines and Triarylmethanes via Multicomponent Reactions: Introduce a Comprehensive Experiment of Organic Chemistry. University Chemistry, 2024, 39(8): 324-330. doi: 10.3866/PKU.DXHX202401063
17. [17]
  Yingchun ZHANG , Yiwei SHI , Ruijie YANG , Xin WANG , Zhiguo SONG , Min WANG . Dual ligands manganese complexes based on benzene sulfonic acid and 2, 2′-bipyridine: Structure and catalytic properties and mechanism in Mannich reaction. Chinese Journal of Inorganic Chemistry, 2024, 40(8): 1501-1510. doi: 10.11862/CJIC.20240078
18. [18]
  Yang ZHOU , Lili YAN , Wenjuan ZHANG , Pinhua RAO . Thermal regeneration of biogas residue biochar and the ammonia nitrogen adsorption properties. Chinese Journal of Inorganic Chemistry, 2025, 41(8): 1574-1588. doi: 10.11862/CJIC.20250032
19. [19]
  Lei Shi . Nucleophilicity and Electrophilicity of Radicals. University Chemistry, 2024, 39(11): 131-135. doi: 10.3866/PKU.DXHX202402018
20. [20]
  Dongheng WANG , Si LI , Shuangquan ZANG . Construction of chiral alkynyl silver chains and modulation of chiral optical properties. Chinese Journal of Inorganic Chemistry, 2025, 41(1): 131-140. doi: 10.11862/CJIC.20240379

Get Citation

PDF

XML

Metrics

PDF Downloads(46)
Abstract views(4235)
HTML views(815)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142