Improving pollutant emission performances of natural gas combustion in a metal fiber surface burner using Y2O3-BaO-ZrO2 catalytic coatings

Fan Li, Tao Li, Haowen Li, Haolin Yang, Liqiao Jiang, Junchao Xu, Huaqiang Chu and Xiaohan Wang

Energy, 2025, vol. 320, issue C

Abstract: This study investigates the combustion and emission performances of low-environmental-impact premixed metal fiber burners for natural gas combustion. High-temperature resistant Y2O3-BaO-ZrO2 was developed through solid state synthesis (SSS) and solution combustion synthesis (SCS), followed by deposition onto Fe-Cr-Al alloy metal fiber matrices. The investigation encompassed various combustion powers (P), excess air ratios (λ), and loading amounts (fcat), within this heterogeneous combustion system. Results demonstrated that while different Y2O3-BaO-ZrO2 coatings exhibited minimal impact on the flame behavior in different combustion models, a significant 30 % average increase in near-surface burning temperature was observed at high P with λ = 1.20–1.30. CO emissions decreased monotonically with increasing λ before reaching stabilization, whereas NO emissions displayed an initial increase followed by subsequent reduction. At relative low P, catalytic burners effectively reduced both CO and NO emissions across a broad λ range, particularly for SCS-coated fibers. However, under high λ and elevated P conditions, both coatings led to a significant increase in thermal NO emissions due to combustion strengthen. Notably, an optimal fcat of 1 % achieved an average reduction of over 50 % in both CO and NO emissions throughout the testing range, providing an innovative green and sustainable pathway toward ultra-low pollutant emissions.

Keywords: Natural gas combustion; Metal fiber surface burner; Y2O3-BaO-ZrO2 catalytic coating; Pollution emission; CO and NO synergistic removal (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:320:y:2025:i:c:s0360544225010990

DOI: 10.1016/j.energy.2025.135457

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