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Research on the Treatment Technology of Sulfur-Containing Tail Gas Using Chelated Iron

Ye Sun, Peng Wang, Rui Liu, Xueri Nan, Nan Wang, Wei Wang, Yan Sun
Vol. 8, No. 8, pp. 16-23, 2026 DOI: 10.54691/p34jx706 August 22, 2026
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Abstract.This study investigates a chelated iron‑based process for H₂S removal from sulfur‑containing tail gas. Eight chelating agents were evaluated for iron complexation capacity at different pH values. The effects of pH, chelator mixing ratio, and Fe³⁺/Fe²⁺ molar ratio on desulfurization performance were examined through 42 complex systems using MATLAB regression analysis. Results show that pH 8–9 enables >90% H₂S absorption. HEDP exhibited the highest iron complexation capacity (30.8 g/L at pH 10) but poor stability; TEA and HEDTA performed stably across the tested pH range. Among the three factors, pH showed the strongest synergistic effect, followed by chelator ratio, while Fe³⁺/Fe²⁺ ratio had the weakest effect. Optimal combinations for binary chelator systems were identified. The developed novel iron‑based desulfurization solution demonstrates promising potential for industrial application.
Keywords. Chelated Iron; Complexation Capacity; H₂S Removal.
APA Citation Ye Sun, Peng Wang, Rui Liu, Xueri Nan, Nan Wang, Wei Wang, Yan Sun (2026). Research on the Treatment Technology of Sulfur-Containing Tail Gas Using Chelated Iron. Scientific Journal of Technology, 8(8), 16-23. https://doi.org/10.54691/p34jx706

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