Citation: CHEN Xiao-dong, KONG Ling-xue, BAI Jin, BAI Zong-qing, LI Wen. Effect of Na₂O on mineral transformation of coal ash under high temperature gasification condition[J]. Journal of Fuel Chemistry and Technology, ;2016, 44(3): 263-272. shu

Effect of Na₂O on mineral transformation of coal ash under high temperature gasification condition

CHEN Xiao-dong ^1,2 ,
KONG Ling-xue ¹ ,
BAI Jin ^1,*,, ,
BAI Zong-qing ¹ ,
LI Wen ¹

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: BAI Jin, stone@sxicc.ac.cn
Received Date: 15 September 2015
Revised Date: 9 December 2015

Fund Project: The project was supported by the National Natural Science Foundation of China 21476247Shanxi Province Science Foundation for Youths 2015021055and Joint Foundation of Natural Science Foundation of China and Shanxi Province U1510201The project was supported by the National Natural Science Foundation of China 21406254

Figures(7)

In order to reveal the mechanism of Na₂O influence on ash fusion temperatures (AFTs), effect of Na₂O on mineral transformation of two coal ashes with different SiO₂+Al₂O₃ levels were investigated by XRD and FT-IR under reducing atmosphere at high temperature. Thermodynamic software package FactSage was used to calculate the ΔG of reactions between minerals to reveal the mechanism of Na₂O influence on mineral transformation. It is found that the effect of Na₂O on mineral compositions depends on SiO₂+Al₂O₃ levels of coal ash. For ash with 82.89% SiO₂+Al₂O₃ while Na₂O content is 5%-20%, albite and nepheline are formed, leading to a decrease of AFTs. However, only nepheline is formed when Na₂O content is higher than 20%. For ash with 47.85% SiO₂+Al₂O₃, when Na₂O content is less than 10%, no Na-containing mineral is observed. When Na₂O content is higher than 10%, Na-containing minerals such as combeite, lazurite and sodium aluminium oxide are formed, resulting in a decrease of AFTs. Furthermore, FactSage results reveal that Na-containing mineral is easily formed at high temperature due to low ΔG of the reactions.
- high temperature gasification,
- Na₂O,
- mineral matter,
- AFTs
1. [1]
  YAN Lu-guang, XIA Xun-cheng, LÜ Shao-qin, WU Jia-chun, LIN Min, HUANG Chang-gang. Great promotion of development of large scale integrative energy base in Xinjiang[J]. Adv Technol Electr Eng Energy, 2011,30(1):1-7.
2. [2]
  CHEN Chuan, ZHANG Shou-yu, LIU Da-hai, GUO Xi, DONG Ai-xia, XIONG Shao-wu, SHI Da-zhong, LÜ Jun-fu. Existence form of sodium in high sodium coals from Xinjiang and its effect on combustion process[J]. J Fuel Chem Technol, 2013,41(7):832-838.
3. [3]
  WANG Yan-liu, ZHANG Xiao-hui. Effect of ash fusion temperatures on coals for gasification[J]. Coal Qual Technol, 2009,4:55-58.
4. [4]
  SONG Han-jiang. The study of comprehensive utilization of coal from Xinjiang Zhundong coalfield[J]. West-China Explor Eng, 2008,20(9):149-151.
5. [5]
  FU Zi-wen, WANG Chang-an, CHE De-fu, WENG Qing-song. Experimental study on the effect of ashing temperature on physicochemical properties of Zhundong coal ashes[J]. J Eng Thermophys, 2014,35(3):609-613.
6. [6]
  CHENG Yi, LI Han-xu, WU Cheng-li. Effect of fluxes on ash fusion characteristics of huainan coal[J]. Coal Technol, 2005,24(12):90-91.
7. [7]
  MAO Jun, XU Ming-hou, LI Fan. The effect of alkali mineral matter on the ash melting characteristic[J]. J Huazhong Univ Sci Technol (Nat Sci Ed), 2003,31(4):59-62.
8. [8]
  YAO Run-sheng, LI Xiao-hong, ZUO Yong-fei, LI Fan. Effect of sodium based flux on the ash melting characteristics temperature of Lingshi coal[J]. J China Coal Soc, 2011,36(6):1027-1031.
9. [9]
  GAO Feng, MA Yong-jing. Study on the effect of Mg²⁺and Na⁺ on the fusibility of coal ash with high ash fusion point[J]. J Fuel Chem Technol, 2012,40(10):1161-1166.
10. [10]
  SONG W, TANG L, ZHU X, WU Y, ZHU Z, SHUNTAROU K. Prediction of Chinese coal ash fusion temperatures in Ar and H₂ atmospheres[J]. Energy Fuels, 2009,23(4):1990-1997. doi: 10.1021/ef800974d
11. [11]
  VASSILEV S V, KITANO K, TAKEDA S, TSURUE T. Influence of mineral and chemical composition of coal ashes on their fusibility[J]. Fuel Process Technol, 1995,45(1):27-55. doi: 10.1016/0378-3820(95)00032-3
12. [12]
  BAI J, LI W, LI B. Characterization of low-temperature coal ash behaviors at high temperatures under reducing atmosphere[J]. Fuel, 2008,87(4/5):583-591.
13. [13]
  WANG Qin-hui, JING Ni-jie, LUO Zhong-yang, LI Xiao-min, JIE Tao. Experiments on the effect of chemical components of coal ash on the sintering temperature[J]. J China Coal Soc, 2010,35(6):1015-1020.
14. [14]
  JING N, WANG Q, CHENG L, LUO Z, CEN K, ZHANG D. Effect of temperature and pressure on the mineralogical and fusion characteristics of Jincheng coal ash in simulated combustion and gasification environments[J]. Fuel, 2013,104:647-655. doi: 10.1016/j.fuel.2012.05.040
15. [15]
  LIAO Min, GUO Qing-hua, LIANG Qin-feng, YUAN Hai-ping, NI Jian-ping, YU Guang-suo. Phase transformation of coal ash at high temperature under gasification conditions and its influence on viscosity[J]. Proc CSEE, 2010,30(17):45-50.
16. [16]
  GREIG J W, BARTH T F W. The system, Na₂O·Al₂O₃·2SiO₂ (nepheline, carnegieite)-Na₂O·Al₂O₃·6SiO₂ (albite)[J]. Am J Sci, 1938,35:93-112.
17. [17]
  WEN Lu, LIANG Wan-xue, ZHANG Zheng-gang, HUANG Jin-chu. The Infrared Spectroscopy of Minerals[M]. Chongqing: Chongqing University Press, 1988.
18. [18]
  VARGAS S, FRANDSEN F J, DAM-JOHANSEN K. Rheological properties of high-temperature melts of coal ashes and other silicates[J]. Prog Energy Combust Sci, 2001,27(3):237-429. doi: 10.1016/S0360-1285(00)00023-X
19. [19]
  MA Z, BAI J, LI W, BAI Z, KONG L. Mineral transformation in char and its effect on coal char gasification reactivity at high temperatures, Part 1: Mineral transformation in char[J]. Energy Fuels, 2013,27(8):4545-4554. doi: 10.1021/ef4010626
20. [20]
  LI Fan, QIU Jian-rong, ZHENG Chu-guang. The effect of mineral matter in coal on the ash melting point with ternary phase diagram[J]. J Huazhong Univ Sci Technol, 1996,24(10):96-99.
21. [21]
  MASTELARO V R, ZANOTTO E D. Relationship between short range order and ease of nucleation in Na₂Ca₂Si₃O₉, CaSiO₃ and PbSiO₃ glasses[J]. J Non-Cryst Solids, 2000,262(1/3):191-199.
22. [22]
  MA Zhi-bin, BAI Zong-qing, BAI Jin, LI Wen, GUO Zhen-xing. Evolution of coal ash with high Si/Al ratio under reducing atmosphere at high temperature[J]. J Fuel Chem Technol, 2012,40(3):279-285.
23. [23]
  WANG H, QIU P, SHI X, ZHANG J, CBEN Y, WU S. Effect of key minerals on the ash melting behavior in a reducing atmosphere[J]. Energy Fuels, 2011,25(8):3446-3455. doi: 10.1021/ef200542n
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Effect of Na₂O on mineral transformation of coal ash under high temperature gasification condition