Modification of ash fusion behavior of high ash fusion temperature (AFT) coal by textile dyeing sludge addition and its mechanism

ZHAO Chao-yue; LI Feng-hai; MA Ming-jie; LI Yang; ZHAO Wei; ZHANG Xu-jing; FANG Yi-tian

doi:10.1016/S1872-5813(21)60189-5

Volume 50 Issue 6

Jun. 2022

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Article Navigation > Journal of Fuel Chemistry and Technology > 2022 > 50(6): 703-713

ZHAO Chao-yue, LI Feng-hai, MA Ming-jie, LI Yang, ZHAO Wei, ZHANG Xu-jing, FANG Yi-tian. Modification of ash fusion behavior of high ash fusion temperature (AFT) coal by textile dyeing sludge addition and its mechanism[J]. Journal of Fuel Chemistry and Technology, 2022, 50(6): 703-713. doi: 10.1016/S1872-5813(21)60189-5

Citation:

ZHAO Chao-yue, LI Feng-hai, MA Ming-jie, LI Yang, ZHAO Wei, ZHANG Xu-jing, FANG Yi-tian. Modification of ash fusion behavior of high ash fusion temperature (AFT) coal by textile dyeing sludge addition and its mechanism[J]. Journal of Fuel Chemistry and Technology, 2022, 50(6): 703-713. doi: 10.1016/S1872-5813(21)60189-5

Citation:

ZHAO Chao-yue, LI Feng-hai, MA Ming-jie, LI Yang, ZHAO Wei, ZHANG Xu-jing, FANG Yi-tian. Modification of ash fusion behavior of high ash fusion temperature (AFT) coal by textile dyeing sludge addition and its mechanism[J]. Journal of Fuel Chemistry and Technology, 2022, 50(6): 703-713. doi: 10.1016/S1872-5813(21)60189-5

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Modification of ash fusion behavior of high ash fusion temperature (AFT) coal by textile dyeing sludge addition and its mechanism

doi: 10.1016/S1872-5813(21)60189-5

ZHAO Chao-yue^{1, 2
,},
LI Feng-hai^{1, 2, 3
,
,},
MA Ming-jie¹,
LI Yang¹,
ZHAO Wei¹,
ZHANG Xu-jing⁴,
FANG Yi-tian³

1.
School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, China
2.
Department of Chemistry and Chemical Engineering, Heze University, Heze 274000, China
3.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
4.
Ten Mines of Pingdingshan Tianan Coal Co. Ltd., Pingdingshan 467021, China

Funds: The project was supported by the Natural Science Foundation of China (21875059), and the Natural Science Foundations of Shandong Province, China (ZR2018MB037).

More Information

Corresponding author: E-mail: hzlfh@163.com
Received Date: 2021-11-18
Accepted Date: 2022-01-06
Rev Recd Date: 2022-01-05

Available Online: 2022-01-28

Publish Date: 2022-06-25

Abstract

Abstract

To address the slagging problem during coal entrained-flow bed (EFB) gasification, the influences of textile dyeing sludge (TDS) addition on the fusing characteristics of high ash fusion temperature (AFT) coal were explored under a reducing atmosphere. And the change mechanisms were investigated by X-ray diffraction, Fourier Transform Infrared Spectroscopy (FT-IR) and FactSage calculation. The results showed that the flow temperature of high ash fusion temperature (AFT) coal decreased below 1380 °C when the TDS addition reached 20%−25%, which met the requirements of liquid-slag removal for EFB gasification. With the content of TDS increasing, the formations of low-melting minerals (e.g., hercynite, anorthite, and albite) decreased AFT. The bridging oxygen bonds of the network structure were destroyed by metal ions (e.g., Fe²⁺, Ca²⁺, Na⁺), formation of much non-bridged oxygen (NBO) bonds relaxed the silicate network, thus decreasing the AFT. The formations of NBO bonds were confirmed by gradual decreases in the peak strengths of Si−O−Si and Si−O−Al bonds and intensified the vibration of Fe−O and Si−O−M ( M: Ca²⁺ or Na⁺) bonds. FactSage calculation results were in good agreement with the experimental ash fusion behavior.
- ash fusion behaviors,
- textile dyeing sludge,
- high AFT coal,
- modification mechanisms

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References(55)

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