Author(s)

ZePeng Li¹, Yasser M. A. Mohamed^2*, YingHui Han^1*

Affiliation(s)

¹College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China.

²Photochemistry Department, National Research Centre, Dokki, Giza, P. O. 12622, Egypt.

Corresponding Author

Yasser M. A. Mohamed, YingHui Han

ABSTRACT

Current flue gas pollution control technologies compliant with ultra-low emission standards exhibit limited effectiveness in removing sulfur trioxide (SO₃)—a key condensable particulate matter (CPM) precursor—necessitating high-efficiency, low-consumption control strategies. To address the poorly elucidated formation mechanisms of SO₃ across ultra-low emission systems, particularly within the SCR+WFGD process chain, this study employed experimental simulations where SO₃ was prepared via the contact process and quantified through controlled condensation coupled with sulfate titration. Catalytic oxidation experiments on cesium-doped V₂O₅ in a temperature-controlled fixed-bed reactor under simulated actual flue gas revealed reaction temperature as the governing factor for SO₃ conversion, achieving peak efficiency at 485–505°C. Whereas SO₂ concentration exerted non-dominant effects due to sustained catalytic stability, space velocity proved negligible under high-temperature regimes. These mechanistic insights establish fundamental pathways for developing targeted SO₃ mitigation technologies.

KEYWORDS

Sulfur trioxide (SO₃); Sulfur dioxide (SO₂); Catalytic oxidation; Driving factors; Ultra-low emission

CITE THIS PAPER

ZePeng Li, Yasser M. A. Mohamed, YingHui Han. Elucidating the driving factors in sulfur trioxide formation under simulated actual ultra-low emission process. World Journal of Engineering Research. 2025, 3(2): 27-31. DOI: https://doi.org/10.61784/wjer3026.

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