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Adsorption
Erschienen in: Adsorption 4/2014

01.05.2014

Adsorption of carbonyl sulfide on modified activated carbon under low-oxygen content conditions

verfasst von: Xueqian Wang, Yixing Ma, Ping Ning, Juan Qiu, Xiaoguang Ren, Ziyan Li, Wei Chen, Wei Liu

Erschienen in: Adsorption | Ausgabe 4/2014

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Abstract

Activated carbon sorbents impregnated with KOH, Fe(NO3)3, Cu(NO3)2, Zn(NO3)2 or Co(NO3)2 and their applications in catalytic oxidation reaction of COS were investigated. The results showed that the activated carbon modified with 10 % (mass percentage) KOH enhanced the adsorption ability significantly. And it was also found that the oxygen content and temperature were the two most important factors in the COS adsorption. Further investigation on the pore structures of the samples with X-ray photoelectron spectroscopy indicated that an adsorption/oxidation process happened in the KOH modified activated carbon in which the major existing forms of sulfur were SO4 2− and S species. The oxidation of COS suggested that KOH in the micropores may play a catalytic role during the adsorption. On the other hand, we found that the desorption activation energy from KOHW was higher than that from AC by the CO2-TPD spectra, which indicated the adsorption of CO2 on KOH impregnated activated carbon was stronger. The strong adsorption could be attributed to the basic groups on the activated carbon surface. In conclusion, the activated carbon impregnated with KOH promises a good candidate for COS adsorbent.
Vorheriger Artikel Physical adsorption of gases: the case for absolute adsorption as the basis for thermodynamic analysis
Nächster Artikel Adsorption isotherms of CO2, CO, N2, CH4, Ar and H2 on activated carbon and zeolite LiX up to 1.0 MPa

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Metadaten
Titel
Adsorption of carbonyl sulfide on modified activated carbon under low-oxygen content conditions
verfasst von
Xueqian Wang
Yixing Ma
Ping Ning
Juan Qiu
Xiaoguang Ren
Ziyan Li
Wei Chen
Wei Liu
Publikationsdatum
01.05.2014
Verlag
Springer US
Erschienen in
Adsorption / Ausgabe 4/2014
Print ISSN: 0929-5607
Elektronische ISSN: 1572-8757
DOI
https://doi.org/10.1007/s10450-014-9607-y

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