Effect of silicon oxide additive on the transformation characteristics of sodium and sulfur in Zhundong coal ash under atmospheric and elevated pressure

XIAO Wu-yang; WEI Bo; WANG Jian-jiang; MA Jin-rong; ABUDOUREHEMAN Maierhaba; LI Xian; YAO Hong; CHENG Ze-ning

doi:10.1016/S1872-5813(23)60353-6

Volume 51 Issue 9

Sep. 2023

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Article Navigation > Journal of Fuel Chemistry and Technology > 2023 > 51(9): 1220-1231

XIAO Wu-yang, WEI Bo, WANG Jian-jiang, MA Jin-rong, ABUDOUREHEMAN Maierhaba, LI Xian, YAO Hong, CHENG Ze-ning. Effect of silicon oxide additive on the transformation characteristics of sodium and sulfur in Zhundong coal ash under atmospheric and elevated pressure[J]. Journal of Fuel Chemistry and Technology, 2023, 51(9): 1220-1231. doi: 10.1016/S1872-5813(23)60353-6

Citation:

XIAO Wu-yang, WEI Bo, WANG Jian-jiang, MA Jin-rong, ABUDOUREHEMAN Maierhaba, LI Xian, YAO Hong, CHENG Ze-ning. Effect of silicon oxide additive on the transformation characteristics of sodium and sulfur in Zhundong coal ash under atmospheric and elevated pressure[J]. Journal of Fuel Chemistry and Technology, 2023, 51(9): 1220-1231. doi: 10.1016/S1872-5813(23)60353-6

Citation:

XIAO Wu-yang, WEI Bo, WANG Jian-jiang, MA Jin-rong, ABUDOUREHEMAN Maierhaba, LI Xian, YAO Hong, CHENG Ze-ning. Effect of silicon oxide additive on the transformation characteristics of sodium and sulfur in Zhundong coal ash under atmospheric and elevated pressure[J]. Journal of Fuel Chemistry and Technology, 2023, 51(9): 1220-1231. doi: 10.1016/S1872-5813(23)60353-6

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Effect of silicon oxide additive on the transformation characteristics of sodium and sulfur in Zhundong coal ash under atmospheric and elevated pressure

doi: 10.1016/S1872-5813(23)60353-6

1.
State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830046, China
2.
Xinjiang Xinye Energy and Chemical Co. Ltd., Wujiaqu 831300, China
3.
State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
4.
Zhundong Energy Research Institute, Xinjiang Tianchi Energy Co., Ltd., Changji 831100, China

Funds: The project was supported by the National Natural Science Foundation of China (51966017), Major Science and Technology Special Project of Xinjiang Uygur Autonomous Region (2022A01002-2), and the Foundation of State Key Laboratory of Coal Combustion (FSKLCCA2201).

More Information

Corresponding author: Tel.: + 086-0991-8582811, E-mail: weiboxju@163.com
Received Date: 2022-08-28
Accepted Date: 2022-09-23
Rev Recd Date: 2022-09-23

Available Online: 2023-04-06

Publish Date: 2023-09-30

Abstract

Abstract

The effects of silicon oxide additive on the transformation characteristics of sodium and sulfur in coal ash under atmospheric and elevated pressure were investigated in this study. The results indicated that silicon oxide additive significantly inhibited the release of sodium under high pressure. The sodium content in ash with 4% of silicon oxide additive was 3.5% at 0.1 MPa, which was higher than that without additive. However, the sodium content increased to 5.4% without additive and 6.9% with 4% additive at 4 MPa, respectively. The sodium mainly existed in the forms of NaAlSiO₄ and NaAlSi₃O₈ at 0.1 MPa, and the content of NaAlSiO₄ increased with increasing additive dosage, which weakened the agglomeration of ash. The decomposition of low melting point mineral CaSO₄ was inhibited at 4 MPa, and the formation of Na₆Ca₂Al₆Si₆O₂₄(SO₄)₂ from NaAlSiO₄ and CaSO₄ was promoted significantly with increasing additive dosage. Furthermore, the inhibition mechanism of sodium and sulfur released from coal ash by silicon oxide under high pressure was proposed.
- Zhundong coal ash,
- elevated pressure,
- silicon oxide additive,
- sodium,
- sulfur

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References(46)

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