Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
612107 | Journal of Colloid and Interface Science | 2007 | 7 Pages |
Abstract
The adsorption of nitrogen in a collection of spheres that touch or merge in a sintering-like manner is modeled using a Derjaguin–Broeckhof–de Boer approach. The proposed model accounts for both positive curvature effects and for capillary condensation at the contact between two spheres. A methodology is proposed to fit the P/P0>0.4P/P0>0.4 adsorption region with the coordination number of the spheres as the only adjustable parameter. The use of the model is illustrated on a series of silica aerogels. The suitability of various standard isotherms needed for the modeling is also discussed.
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Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Cedric J. Gommes, Peter Ravikovitch, Alexander Neimark,