US EPA

4959403 

Journal Article 

Comparison between different presentations of pore size distribution in porous materials 

Meyer, K; Klobes, P 

1999 

Yes 

Fresenius' Journal of Analytical Chemistry
ISSN: 0937-0633
EISSN: 1432-1130 

363 

2 

174-178 

10.1007/s002160051166 

WOS:000078376700007 

The different presentations of the pore size distribution derived from the gas adsorption method and the mercury porosimetry are connected with some problems. This concerns especially the use of the logarithmically differential pore volume distribution. The incorrect application of this distribution to bimodal pore systems involves the danger of an apparent overemphasizing of larger pores. This effect may also occur using the incremental pore size distribution in case the experimental point spacing considerably increases towards the larger pore radii. The pore volume density distribution defined as the linear derivative of the cumulative pore volume curve with respect to the pore radius has been found the most convenient form among the various kinds of pore volume distribution presentations. It has been shown that the direct comparison between this distribution and the logarithmically differential pore volume distribution is not allowed. Nevertheless, there is a clear connection between these definitions for the pore size distribution so that they are completely equivalent.