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Titolo:
Regularities in the temperature-programmed desorption spectra of CO2 and CO from activated carbons
Autore:
Haydar, S; Moreno-Castilla, C; Ferro-Garcia, MA; Carrasco-Marin, F; Rivera-Utrilla, J; Perrard, A; Joly, JP;
Indirizzi:
Univ Lyon 1, Lab Applicat Chim Environm, CNRS, UMR 5634, F-69622 Villeurbanne, France Univ Lyon 1 Villeurbanne France F-69622 34, F-69622 Villeurbanne, France Univ Granada, Fac Ciencias, Dept Quim Inorgan, E-18071 Granada, Spain UnivGranada Granada Spain E-18071 Quim Inorgan, E-18071 Granada, Spain CNRS, Inst Rech Catalyse, F-69626 Villeurbanne, France CNRS VilleurbanneFrance F-69626 Catalyse, F-69626 Villeurbanne, France
Titolo Testata:
CARBON
fascicolo: 9, volume: 38, anno: 2000,
pagine: 1297 - 1308
SICI:
0008-6223(2000)38:9<1297:RITTDS>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
OXYGEN-SURFACE COMPLEXES; THERMAL-DESORPTION; NITRIC-ACID; TPD; OXIDATION; DIOXIDE; FIBERS; DRIFTS; OXIDES; CHARS;
Keywords:
activated carbon; temperature programmed desorption (TPD), mass spectrometry; surface oxygen complexes;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Joly, JP Univ Lyon 1, Lab Applicat Chim Environm, CNRS, UMR 5634, 43 Bd Onze Novembre 1918, F-69622 Villeurbanne, France Univ Lyon 1 43 Bd Onze Novembre 1918 Villeurbanne France F-69622
Citazione:
S. Haydar et al., "Regularities in the temperature-programmed desorption spectra of CO2 and CO from activated carbons", CARBON, 38(9), 2000, pp. 1297-1308

Abstract

Temperature-programmed desorption (TPD) spectra of CO and CO2 have been obtained under vacuum or helium flow with activated carbons from different origins and oxidized in various ways. In particular, a special form of TPD, called Intermittent TPD, has been applied to one of the carbon samples (prepared from almond shells and oxidized with nitric acid) in order determine the variation of the apparent activation energy of desorption Ed as the coverage of the surface decreases. Regularities appeared in the set of results obtained: There are common features in TPD profiles of carbons from different origins and histories. This finding is confirmed by a re-examination of numerous CO and CO2 spectra found in the literature, including results obtained under ultra-vacuum. These regularities are interpreted by the existence of the same superficial entities (various oxygen groups with different environments). (C) 2000 Elsevier Science Ltd. All rights reserved.

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Documento generato il 15/07/20 alle ore 08:34:41