Adsorption of low-concentration H2S on manganese dioxide-loaded activated carbon

Adsorption of low-concentration H2S on manganese dioxide-loaded activated carbon Manganese dioxide-loaded activated carbon (AC) absorbents (MnO2/AC) were prepared and characterized by XRD, N2 adsorption–desorption, BET, and SEM. A mixture of H2S and N2 was used to evaluate the performance of absorbents in a fixed adsorption bed for H2S removal. Results show that the specific surface area decreased from 580.4 to 390.9 m2 g−1 with modification of manganese dioxide and the topography changed significantly. A suitable H2S removal activity was obtained with a manganese dioxide-to-AC ratio of 1:1, drying temperature of 393 K, and drying time of 24 h. At the adsorption temperature of 313 K and a flow rate of 20 ml min−1, the H2S breakthrough capacity of 110.7 mg g−1 was observed. Comparing with the unmodified AC, H2S breakthrough capacity increased by 96.9 mg g−1. The kinetics of adsorptive removal of H2S over the MnO2/AC adsorbent followed the Bangham model, $$\ln \frac{0.1181}{0.1181 - q} = 3.002t^{1.352}$$ ln 0.1181 0.1181 - q = 3.002 t 1.352 . http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Adsorption of low-concentration H2S on manganese dioxide-loaded activated carbon

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Publisher
Springer Netherlands
Copyright
Copyright © 2014 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-014-1724-4
Publisher site
See Article on Publisher Site

Abstract

Manganese dioxide-loaded activated carbon (AC) absorbents (MnO2/AC) were prepared and characterized by XRD, N2 adsorption–desorption, BET, and SEM. A mixture of H2S and N2 was used to evaluate the performance of absorbents in a fixed adsorption bed for H2S removal. Results show that the specific surface area decreased from 580.4 to 390.9 m2 g−1 with modification of manganese dioxide and the topography changed significantly. A suitable H2S removal activity was obtained with a manganese dioxide-to-AC ratio of 1:1, drying temperature of 393 K, and drying time of 24 h. At the adsorption temperature of 313 K and a flow rate of 20 ml min−1, the H2S breakthrough capacity of 110.7 mg g−1 was observed. Comparing with the unmodified AC, H2S breakthrough capacity increased by 96.9 mg g−1. The kinetics of adsorptive removal of H2S over the MnO2/AC adsorbent followed the Bangham model, $$\ln \frac{0.1181}{0.1181 - q} = 3.002t^{1.352}$$ ln 0.1181 0.1181 - q = 3.002 t 1.352 .

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Jun 11, 2014

References

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