Analysis of the relationship between H{sub 2}S removal capacity and surface properties of unimpregnated activated carbons
The H{sub 2}S breakthrough capacity was measured on two series of activated carbons of a coconut shell and a bituminous coal origins. To broaden the spectrum of surface features the samples were oxidized using nitric acid or ammonium persulfate under conditions chosen to preserve their pore structures. Then the carbons were characterized using Boehm titration, potentiometric titration, thermal analysis, temperature programmed desorption, sorption of nitrogen, and sorption of water. It was found that the choice of unimpregnated carbon for application as H{sub 2}S adsorbent should be made based on parameters of its acidity such as number of acidic groups, pH of surface, amount of surface groups oxygen, or weight loss associated to decomposition of surface oxygen species. The results obtained from the analyses of six unimpregnated carbon samples suggest that there are certain threshold values of these quantities which, when exceeded, have a dramatic effect on the H{sub 2}S breakthrough capacity.
- Research Organization:
- City Coll. of New York, NY (US)
- OSTI ID:
- 20020739
- Journal Information:
- Environmental Science and Technology, Vol. 34, Issue 4; Other Information: PBD: 15 Feb 2000; ISSN 0013-936X
- Country of Publication:
- United States
- Language:
- English
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