Effectiveness of Hydrogen Peroxide in H2S Removal by a Packed High Specific Surface Area Bed Scrubber

G. Moussavi, K. Naddafi, A. Mesdaghinia and M. Mohseni

Abstract
Removal of H2S from waste air streams was investigated in a chemical scrubber packed with new low-cost and high specific surface area media and in the presence of H2O2 in scrubbing liquid. The experimental conditions included superficial gas velocities of ν = 500 and ν = 840 m h–1, inlet H2S volume fraction in the range of φ = 50 to 250 · 10–6, scrubbing liquid flow rate ranging from QL = 1 to 10 L min–1 and liquid phase pH of 7 to 12. The results showed H2S removal efficiencies of η = 97.5 % to more than η = 99 % at liquid flow rate of QL = 5 L min–1 and pH of 10 to 11. Overall, it was determined that the media tested and H2O2 can be used in scrubbers for efficient H2S removal without the possibility of forming any toxic byproducts.

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Keywords
Hydrogen sulfide, treatment methods, chemical scrubber, hydrogen peroxide