Desulfurization Performance of Rare Earth Mono-substituted Heteropoly Compounds

In this study, a series of rare earth monosubstituted Dawson-type polyoxometalates were synthesized for highly effective removal of hydrogen sulfide (H_2S). The unused, used and regenerated polyoxometalates were characterized by Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron...

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Bibliographic Details
Published in:Aerosol and Air Quality Research 2019-12, Vol.19 (12), p.2888-2898
Main Authors: Pei, Xiaoning, Wang, Rui
Format: Article
Language:English
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Summary:In this study, a series of rare earth monosubstituted Dawson-type polyoxometalates were synthesized for highly effective removal of hydrogen sulfide (H_2S). The unused, used and regenerated polyoxometalates were characterized by Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The results confirmed that K_(17)[Pr(P_2Mo_(17)O_(61))_2] could maintain a complete Dawson-type structure even after absorption and regeneration. H_2S absorption study showed that K_(17)[Pr(P_2Mo_(17)O_(61))_2] had the remarkable desulfurization and regeneration capabilities. Optimization experiments showed that K_(17)[Pr(P_2Mo_(17)O_(61))_2] under the condition of low H_2S concentration or high dosage of K_(17)[Pr(P_2Mo_(17)O_(61))_2] had the ideal desulfurization performance. An appropriate temperature of 25°C is necessary for high removal efficiency. The optimum pH value for desulfurization is 6.8. The desulfurization product was proved to be SO_4^(2-).
ISSN:1680-8584
2071-1409
DOI:10.4209/aaqr.2019.10.0540