Removing carbonyl sulfide with metal-modified activated carbon

Juan QIU , Ping NING , Xueqian WANG , Kai LI , Wei LIU , Wei CHEN , Langlang WANG

Front. Environ. Sci. Eng. ›› 2016, Vol. 10 ›› Issue (1) : 11 -18.

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Front. Environ. Sci. Eng. ›› 2016, Vol. 10 ›› Issue (1) : 11 -18. DOI: 10.1007/s11783-014-0714-5
RESEARCH ARTICLE
RESEARCH ARTICLE

Removing carbonyl sulfide with metal-modified activated carbon

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Abstract

A Cu-Co-K/activated carbon (AC) adsorbent has been developed for the removal of carbonyl sulfide (COS). The effects of COS concentration, reaction temperature and relative humidity were closely examined. A breakthrough of 33.23 mg COS·g−1 adsorbent at 60°C, under 30% relative humidity and in presence of 1.0% oxygen was exhibited in the Cu-Co-K/AC adsorbent prepared. Competitive adsorption studies for COS in the presence of CS2, and H2S were also conducted. TPD analysis was used to identify sulfur-containing products on the carbon surface, and the results indicated that H2S, COS and SO2 were all evident in the effluent gas generated from the exhausted Cu-Co-K/AC. Structure of the activated carbon samples has been characterized using nitrogen adsorption, and their surface chemical structures were also determined with X-ray photoelectron spectroscopy (XPS). It turns out that the modification with Cu(OH)2CO3-CoPcS-KOH can significantly improve the COS removal capacity, forming SO42 species simultaneously. Regeneration of the spent activated carbon sorbents by thermal desorption has also been explored.

Keywords

carbonyl sulfide / activated carbon / removal / reactive adsorption

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Juan QIU, Ping NING, Xueqian WANG, Kai LI, Wei LIU, Wei CHEN, Langlang WANG. Removing carbonyl sulfide with metal-modified activated carbon. Front. Environ. Sci. Eng., 2016, 10(1): 11-18 DOI:10.1007/s11783-014-0714-5

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