Composition and Structural Characteristics of Coal Gasification Slag from Jinhua Furnace and Its Thermochemical Conversion Performance

Zitao Zhao, Wenlong Mo (), Guihan Zhao, Yingshuang Zhang (), Hao Guo, Jun Feng, Zhiqiang Yang, Dong Wei, Xing Fan and Xian-Yong Wei
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Zitao Zhao: State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830046, China
Wenlong Mo: State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830046, China
Guihan Zhao: State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830046, China
Yingshuang Zhang: State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830046, China
Hao Guo: State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830046, China
Jun Feng: State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830046, China
Zhiqiang Yang: Xinjiang Tianyehuihe New Material Co., Ltd., Shihezi 831700, China
Dong Wei: Xinjiang Tianyehuihe New Material Co., Ltd., Shihezi 831700, China
Xing Fan: State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830046, China
Xian-Yong Wei: State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830046, China

Sustainability, 2024, vol. 16, issue 14, 1-15

Abstract: Gasification technology enables the clean and efficient utilization of coal. However, the process generates a significant amount of solid waste—coal gasification slag. This paper focuses on the Jinhua furnace coal gasification slag (fine slag, FS; coarse slag, CS) as the research subject, analyzing its composition and structural characteristics, and discussing the thermochemical conversion performance of both under different atmospheres (N 2 and air). The results show that the fixed carbon content in FS is as high as 35.82%, while it is only 1% in CS. FS has a large number of fluffy porous carbon on its surface, which wraps around or embeds into smooth and variously sized spherical inorganic components, with a specific surface area as high as 353 m 2 /g, and the pore structure is mainly mesoporous. Compared to the raw coal (TYC), the types of organic functional groups in FS and CS are significantly reduced, and the graphitization degree of the carbon elements in FS is higher. The ash in FS is mainly amorphous and glassy, while in CS, it mainly has crystalline structures. The weight loss rates of TYC and FS under an inert atmosphere are 27.49% and 10.38%, respectively; under an air atmosphere, the weight loss rates of TYC and FS are 81.69% and 44.40%, respectively. Based on the analysis of the thermal stability of FS and its high specific surface area, this paper suggests that FS can be used to prepare high-value-added products such as porous carbon or high-temperature-resistant carbon materials through the method of carbon–ash separation.

Keywords: coal gasification slag; chemical composition; physical structure; thermochemical transformation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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