In:
Adsorption Science & Technology, SAGE Publications, Vol. 23, No. 9 ( 2005-11), p. 763-776
Kurzfassung:
The adsorption of carbon dioxide on mesoporous silicas was studied near the critical temperature (T c ) of CO 2 , i.e. 304.2 K. The critical temperature in the mesopores at which the first-order phase transition (capillary condensation) was observed (T cp ) was estimated from the inverse slope of the adsorption isotherms and the behaviour of the adsorption isotherms per unit surface area. The values of T cp for CO 2 in mesopores whose radii, r p , were 3.02 and 2.14 nm were higher than those estimated using a slab model in which the adsorbing parts of layer were clearly separated from the non-adsorbing regions. The differential heat of adsorption decreased with increasing pore size of the mesoporous adsorbent. This result also suggested a deviation from the slab model.
Materialart:
Online-Ressource
ISSN:
0263-6174
,
2048-4038
DOI:
10.1260/026361705776316569
Sprache:
Englisch
Verlag:
SAGE Publications
Publikationsdatum:
2005
ZDB Id:
2017917-0
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