A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
X-Ray Photoelectron Spectroscopy Surface Studies of Activated Carbon
ASC Whetlerite is used for removal of reactive gases from streams of air. Of importance to the military is its ability to remove HCN, (CN)2, CNCL and AsH3 through reaction/chemisorption with impregnants, namely copper, chromium and silver. ASC Whetlerite is prepared through impregnation of charcoal granules with ammonium carbonate solutions of chromium (VI), copper (II) and silver salts. The speciation of the impregnants is not well defined. Pytlewski has reported the existence of various copper-chromium complexes on ASC Whetlerite. Treatment of ASC Whetlerite with triethylenediamine (TEDA) following impregnation is reported to improve protection against cyanogen chloride. The objective of this study was to determine the oxidation state(s) of the impregnants and investigate whether a large fraction of the impregnants is located at the external surface of the carbon granules. Both ASC and ASC treated with TEDA (ASC-TEDA) will be analyzed in an effort to determine the role of TEDA in the improved reactivity of ASC. (aw)
X-Ray Photoelectron Spectroscopy Surface Studies of Activated Carbon
ASC Whetlerite is used for removal of reactive gases from streams of air. Of importance to the military is its ability to remove HCN, (CN)2, CNCL and AsH3 through reaction/chemisorption with impregnants, namely copper, chromium and silver. ASC Whetlerite is prepared through impregnation of charcoal granules with ammonium carbonate solutions of chromium (VI), copper (II) and silver salts. The speciation of the impregnants is not well defined. Pytlewski has reported the existence of various copper-chromium complexes on ASC Whetlerite. Treatment of ASC Whetlerite with triethylenediamine (TEDA) following impregnation is reported to improve protection against cyanogen chloride. The objective of this study was to determine the oxidation state(s) of the impregnants and investigate whether a large fraction of the impregnants is located at the external surface of the carbon granules. Both ASC and ASC treated with TEDA (ASC-TEDA) will be analyzed in an effort to determine the role of TEDA in the improved reactivity of ASC. (aw)
X-Ray Photoelectron Spectroscopy Surface Studies of Activated Carbon
J. A. Rossin (author)
1989
38 pages
Report
No indication
English
Physical & Theoretical Chemistry , Activated carbon , Impregnation , Surface chemistry , Air , Ammonium compounds , Carbon , Carbonates , Charcoal , Chemisorption , Chlorides , Chromium , Copper , Cyanogen , Ethylenediamine , External , Granules , Oxidation , Reactive gases , Reactivities , Removal , Response , Salts , Silver , Solutions(Mixtures) , Streams , Surfaces , Surface reactions , X ray photoelectron spectroscopy , Hydrogen cyanide , Arsines , Whetlerite , Oxidation states
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