Absolute assessment of adsorption-based porous solid characterization methods: comparison methods.
The design and use of microporous solids depends on having access to characteristics such as the pore volume and surface area. Comparison methods such as the alpha(s) method are one of the most widely used means of determining these parameters. An assessment of this group of methods was undertaken by comparing estimates obtained from them using adsorption isotherms generated by grand canonical Monte Carlo simulation on a selection of model nanoporous solids with exactly known surface areas and pore volumes. Conclusions are drawn from this absolute assessment in regard to the validity of the alpha(s) method for determining the micropore volume, the mesopore surface area, and the separation of pore groups based on the concept of primary and cooperative filling, the subtracting pore effect (SPE) method, and the required character of the reference surface.
Institute for Materials and Processes, University of Edinburgh, Kenneth Denbigh Building, King's Buildings, Mayfield Road, Edinburgh EH9 3JL, UK. M.Biggs@ed.ac.uk
Mark J
MJ
Biggs
Alex
A
Buts
David
D
Williamson