Title

Desulfurization Performance of Rare Earth Mono-substituted Heteropoly Compounds

DOI

10.4209/aaqr.2019.10.0540

Authors

Xiaoning Pei;Rui Wang

Key Words

Rare earth ion ; Heteropoly compounds ; H_2S ; Desulfurization

PublicationName

Aerosol and Air Quality Research

Volume or Term/Year and Month of Publication

19卷12期(2019 / 12 / 01)

Page #

2888 - 2898

Content Language

英文

Chinese Abstract

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-).

Topic Category 工程學 > 市政與環境工程