Effect of Potassium on the Co-Combustion Process of Coal Slime and Corn Stover

Jing Zheng, Chuanchuan Cai (), Tao Ge and Mingxu Zhang
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Jing Zheng: School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China
Chuanchuan Cai: School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China
Tao Ge: School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China
Mingxu Zhang: School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China

Energies, 2024, vol. 17, issue 20, 1-12

Abstract: In this study, the combined combustion characteristics and gaseous product emissions of coal slime and corn stover were compared at different blending ratios. The TG-DTG curves indicate that the optimal performance is achieved when the corn straw blending ratio is 20%. Furthermore, the TG-FTIR coupling results demonstrated an increase in gas species as the blending ratio increased. The composition analysis of ash samples formed at various combustion temperatures using XRD and XRF indicated that a portion of KCl in the fuel was released as volatile matter, while another part reacted with Al 2 O 3 and SiO 2 components in the slime to form silica–aluminate compounds and other substances. Notably, interactions between the components of slime and potassium elements in corn stover primarily occurred within the temperature range of 800–1000 °C. These findings contribute to a comprehensive understanding of biomass and coal co-firing combustion chemistry, offering potential applications for enhancing energy efficiency and reducing emissions in industrial processes.

Keywords: coal slime; co-combustion; potassium; combustion characteristics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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