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Titolo:
On the adsorption of formaldehyde at high temperatures and zero surface coverage
Autore:
Domingo-Garcia, M; Fernandez-Morales, I; Lopez-Garzon, FJ; Moreno-Castilla, C; Perez-Mendoza, M;
Indirizzi:
Fac Ciencias, Dept Quim Inorgan, Grp Invest Carbones, Granada, Spain Fac Ciencias Granada Spain Inorgan, Grp Invest Carbones, Granada, Spain
Titolo Testata:
LANGMUIR
fascicolo: 9, volume: 15, anno: 1999,
pagine: 3226 - 3231
SICI:
0743-7463(19990427)15:9<3226:OTAOFA>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
INVERSE GAS-CHROMATOGRAPHY; FORMIC-ACID; INFINITE DILUTION; ACTIVATED CARBONS; PD SURFACES; CATALYSTS; ALDEHYDES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Lopez-Garzon, FJ Fac Ciencias, Dept Quim Inorgan, Grp Invest Carbones, Granada, Spain Fac Ciencias Granada Spain st Carbones, Granada, Spain
Citazione:
M. Domingo-Garcia et al., "On the adsorption of formaldehyde at high temperatures and zero surface coverage", LANGMUIR, 15(9), 1999, pp. 3226-3231

Abstract

The adsorption of formaldehyde (HCHO) at very low vapor concentration (zero surface coverage) is studied on several carbon materials by using inversegas-solid chromatography (IGC). The adsorption process is carried out in the Henry's law region. Therefore, the specific retention volumes, V-s, allow the determination of the standard enthalpy of adsorption, Delta H degrees(A), using the linear relationship between In V-s vs 1/T. Nevertheless two linear plots are obtained for the adsorption of HCHO on these carbon materials. Several experiments have been designed in order to determine the physical meaning of these Linear plots. The general conclusion is that they are produced by a temperature-dependent mechanism which allows the adsorption to occur in smaller pores at lower temperatures and in larger ones at highertemperatures.

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Documento generato il 29/03/20 alle ore 18:19:27