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.
Removing carbonyl sulfide with metal-modified activated carbon
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 species simultaneously. Regeneration of the spent activated carbon sorbents by thermal desorption has also been explored.
carbonyl sulfide / activated carbon / removal / reactive adsorption
| [1] |
|
| [2] |
|
| [3] |
|
| [4] |
|
| [5] |
|
| [6] |
|
| [7] |
|
| [8] |
|
| [9] |
|
| [10] |
|
| [11] |
|
| [12] |
|
| [13] |
|
| [14] |
|
| [15] |
|
| [16] |
|
| [17] |
|
| [18] |
|
| [19] |
|
| [20] |
|
| [21] |
|
| [22] |
|
| [23] |
|
| [24] |
|
| [25] |
|
Higher Education Press and Springer-Verlag Berlin Heidelberg
/
| 〈 |
|
〉 |