Study of the Structure and Catalytic Activity of B-Site Doping Perovskite for an Inferior Anthracite Coal Combustion

Guohong Wang, Shunli Zhang, Zhuo Huang, Xin Cui () and Zhengchang Song ()
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Guohong Wang: School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, Xuzhou 221116, China
Shunli Zhang: School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, Xuzhou 221116, China
Zhuo Huang: School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, Xuzhou 221116, China
Xin Cui: School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, Xuzhou 221116, China
Zhengchang Song: School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, Xuzhou 221116, China

Energies, 2023, vol. 16, issue 14, 1-17

Abstract: The unique structure and physical properties of perovskite-type catalysts make them highly promising for catalyzing efficient coal combustion. Mesoporous perovskite LaNi x Fe 1−x O 3 (x = 0.2, 0.4, 0.6, 0.8) coal combustion catalysts were synthesized using the sol–gel method. The effects of the doping amount of B-site doped nickel on both the crystal structure and catalytic performance were investigated. X-ray diffraction, scanning electron microscopy, and nitrogen adsorption–desorption tests were used to characterize the catalyst samples. Thermogravimetric analysis (TG) and activation energy (E a ) calculations were used to assess the catalyst’s activity for the catalytic combustion of anthracite coal (JF coal, originating from Shanxi, China). Results revealed that nickel doping created lattice distortion and Ni-Fe alloy interactions. The difference in nickel doping significantly affects the morphology and catalytic activity of perovskite. The addition of LaNi 0.6 Fe 0.4 O 3 (NI6) with a mass fraction of 5% resulted in the highest average burning rate value (v a = 4.52%/min) of JF coal among all synthesized catalysts. The E a of JF coal catalytic combustion, calculated using the Coats–Redfern method and the Doyle method, showed a good agreement with the TG curves. The LaNi x Fe 1-x O 3 series catalysts were found to significantly decrease the E a of JF coal combustion, with a maximum reduction of 42% compared to the case without any catalyst added. Among the synthesized catalysts, NI6 exhibited a favorable catalytic combustion performance and is thus a promising candidate for the clean and efficient utilization of coal resources.

Keywords: B-site doping perovskite; composites; sol–gel chemistry; catalytic combustion (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: 2023
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