ISSN:
1572-8757
Keywords:
mesopore structure
;
Saam-Cole theory
;
adsorption hysteresis
;
carbon aerogel
;
nitrogen adsorption
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Physics
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Abstract The detailed adsorption isotherms of nitrogen on carbon aerogels at 77 K were measured. The N2 adsorption isotherm had a marked hysteresis. The adsorption isotherms were analyzed by high resolution αs-plots to evaluate their porosity. The αs-plots showed an explicit upward deviation from the linearity below αs = 0.5, suggesting the presence of micropores. The mesoporosity and microporosity were separately determined from the αs-plot. The predominant pores in carbon aerogels were mesopores and the percentage of micropores was in the range of 5 to 10% of the total pore volume. The N2 adsorption hysteresis was analyzed with the Saam-Cole theory under the assumption of the cylindrical pore shape. The parameters determined from the Saam-Cole method were associated with the carbon aerogel structure.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1008839913594
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