Pore structure of coal gasification fine slag based on nitrogen adsorption and nuclear magnetic resonance analysis

YU Wei; LIU Li-jun; GAO Bo; WANG Li-na; YUE Shuang-ling

doi:10.19906/j.cnki.JFCT.2022017

Volume 50 Issue 8

Aug. 2022

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YU Wei, LIU Li-jun, GAO Bo, WANG Li-na, YUE Shuang-ling. Pore structure of coal gasification fine slag based on nitrogen adsorption and nuclear magnetic resonance analysis[J]. Journal of Fuel Chemistry and Technology, 2022, 50(8): 966-973. doi: 10.19906/j.cnki.JFCT.2022017

Citation:

YU Wei, LIU Li-jun, GAO Bo, WANG Li-na, YUE Shuang-ling. Pore structure of coal gasification fine slag based on nitrogen adsorption and nuclear magnetic resonance analysis[J]. Journal of Fuel Chemistry and Technology, 2022, 50(8): 966-973. doi: 10.19906/j.cnki.JFCT.2022017

Citation:

YU Wei, LIU Li-jun, GAO Bo, WANG Li-na, YUE Shuang-ling. Pore structure of coal gasification fine slag based on nitrogen adsorption and nuclear magnetic resonance analysis[J]. Journal of Fuel Chemistry and Technology, 2022, 50(8): 966-973. doi: 10.19906/j.cnki.JFCT.2022017

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Pore structure of coal gasification fine slag based on nitrogen adsorption and nuclear magnetic resonance analysis

doi: 10.19906/j.cnki.JFCT.2022017

1.
School of Chemistry and Chemical Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
2.
School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
3.
Shaaxi Coal Industry New Energy and Coal Preparation Technology Co. Ltd.., Xi’an 710100, China

Funds: The project was supported by National Key Research and Development Program (2020YFC1910000) and Natural Science Basic Research Plan in Shaanxi Province of China (2021JLM-15).

Received Date: 2022-01-24
Accepted Date: 2022-03-10
Rev Recd Date: 2022-02-21

Available Online: 2022-03-18

Publish Date: 2022-08-26

Abstract

Abstract

The pore structure of coal gasification fine slag in Ningxia was characterized and analyzed by low temperature nitrogen adsorption, scanning electron microscope and low field NMR. The pore morphology is mainly fracture shape, and the BET specific surface area of each particle size is large, which is 125.78−589.78 m²/g. The SEM analysis shows that the BJH pore diameter is quite different from the actual situation, and the analysis of pore structure only by low-temperature nitrogen adsorption method has certain limitations. The low field NMR method shows that the products pore sizes of all particle sizes contain micropores, transition pores, mesopores and macropores, and the total porosity is about 27%, mainly mesopores and macropores, followed by micropores and transition pores. The pore structure shows that the products of different particle sizes of coal gasification fine slag have certain adsorption properties, but the medium and large pores are the main storage space of water, resulting in difficulty in dehydration.
- coal gasification fine slag,
- pore structure,
- low temperature nitrogen adsorption,
- scanning electron microscope,
- low field nuclear magnetic resonance

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References(27)

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