Physical and chemical properties of fly ash from fluidized bed gasification of Zhundong coal

ZHANG Yu-kui; ZHANG Hai-xia; ZHU Zhi-ping

Volume 44 Issue 3

Mar. 2016

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Article Navigation > Journal of Fuel Chemistry and Technology > 2016 > 44(3): 305-313

ZHANG Yu-kui, ZHANG Hai-xia, ZHU Zhi-ping. Physical and chemical properties of fly ash from fluidized bed gasification of Zhundong coal[J]. Journal of Fuel Chemistry and Technology, 2016, 44(3): 305-313.

Citation:

ZHANG Yu-kui, ZHANG Hai-xia, ZHU Zhi-ping. Physical and chemical properties of fly ash from fluidized bed gasification of Zhundong coal[J]. Journal of Fuel Chemistry and Technology, 2016, 44(3): 305-313.

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Physical and chemical properties of fly ash from fluidized bed gasification of Zhundong coal

1.
Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds:

The project was supported by the National Natural Science Foundation of China 21306193

Received Date: 2015-07-01
Rev Recd Date: 2015-10-12

Available Online: 2021-01-23

Publish Date: 2016-03-30

Abstract

Abstract

The ash fusion characteristics, physical structure, chemical compositions and gasification reactivity of Zhundong coal (ZD) fly ash from fluidized bed gasification were explored by fusion point analyzer, X-ray fluorescence spectrometer (XRF), scanning electron microscopy (SEM), and thermo-gravimetric analyzer. The results show that the concentrations of minerals in ZD fly ash, such as SiO₂, Fe₂O₃, Na₂O, CaO, change greatly during gasification process, but the ash fusion temperature of ZD fly ash is similar to that of ZD. There is a wide particle-size distribution in ZD fly ash, which shows a significant bimodal distribution, and a large difference of elemental compositions for ZD fly ash of different particle size. The reactivity of ZD fly ash increases with the increase in gasification temperature. Compared with the ZD char from pyrolysis, the ZD fly ash has more advanced carbon crystalline structure, a larger surface area and is relatively rich in meso-pores and macro-pores, which results in a higher gasification reactivity.
- Zhundong coal,
- fluidized bed gasification,
- fusion characteristics,
- gasification reactivity

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References(25)

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