Distribution of alkaline (earth) metals and gasification reaction characteristics of HSQ coal under CO<sub>2</sub>/H<sub>2</sub>O atmosphere

GUAN Yu; ZHANG Yan-di; LIU Yin-he

doi:10.19906/j.cnki.JFCT.2021093

Volume 50 Issue 6

Jun. 2022

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GUAN Yu, ZHANG Yan-di, LIU Yin-he. Distribution of alkaline (earth) metals and gasification reaction characteristics of HSQ coal under CO2/H2O atmosphere[J]. Journal of Fuel Chemistry and Technology, 2022, 50(6): 674-682. doi: 10.19906/j.cnki.JFCT.2021093

Citation:

GUAN Yu, ZHANG Yan-di, LIU Yin-he. Distribution of alkaline (earth) metals and gasification reaction characteristics of HSQ coal under CO₂/H₂O atmosphere[J]. Journal of Fuel Chemistry and Technology, 2022, 50(6): 674-682. doi: 10.19906/j.cnki.JFCT.2021093

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Distribution of alkaline (earth) metals and gasification reaction characteristics of HSQ coal under CO₂/H₂O atmosphere

doi: 10.19906/j.cnki.JFCT.2021093

GUAN Yu^{1, 2
,},
ZHANG Yan-di^{1, 2},
LIU Yin-he^{1, 2
,
,}

1.
State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
2.
School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China

Funds: The project was supported by the Key Research and Development Plan of Shaanxi Province (2021GXLH-Z-088).

Received Date: 2021-10-14
Accepted Date: 2021-12-01
Rev Recd Date: 2021-11-30

Available Online: 2021-12-18

Publish Date: 2022-06-25

Abstract

Abstract

The distributions of Hongshaquan coal's alkaline (earth) metals and their influence on coal char gasification reaction activity under different gasification conditions were investigated in a high-temperature gasification fixed-bed experimental system. The results showed that the Na discretely distributed on the char surface at low temperature, while it showed a slight aggregation phenomenon when the gasification temperature was higher than ash fusion temperature. During the gasification process, the K was evenly distributed on the char surface. The enrichment of Ca and Mg elements on the surface of coal char was relatively obvious. The migration clusters of calcium-containing and magnesium-containing minerals formed large-sized ash sphere in the depressions on the surface of coal char. There was a certain dependence on the distribution of the above two elements. As the carbon conversion increased, the apparent activation energy and pre-exponential factor all increased, and the reactivity of coal char became worse.
- Hongshaquan coal,
- gasification,
- CO₂/H₂O atmosphere,
- alkali (earth) metal,
- coal char

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References(26)

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