Gas Sorption Analysis of Pore Size Distribution andPore Anisotropy ofMesoporous Materials
Journal Title: IOSR Journal of Applied Geology and Geophysics (IOSR-JAGG) - Year 2018, Vol 6, Issue 2
Abstract
In this research, the pore anisotropy of porous media have been estimated. The methodology is based on the pore size distribution and the surface area distribution, both calculated from nitrogen adsorption and desorption isotherms. However, the original testing method by Pomonis and Armatas erred and left out some fundamental assumptions and parameters, nevertheless, the resultant analysis was satisfactory for the materials tested. The original pore anisotropy methodology has been modified and tested on porous alumina and silica materials. The materials studied are chemically pure mesoporous silica and alumina catalyst support pellets with simplified pore sizes, pore size distribution, and surface chemistry. A measure of the pore length (α) was derived from the method. Therefore, pore anisotropy estimation method has severe limitations due to the inability to measure pore length of the samples. Nevertheless, samples with very positive slope (α) would have long pores depending on the size of the constant in the power law correlation. These values are in the range of - 5.055 ± 0.520 to 1.514 ± 0.140, respectively.
Authors and Affiliations
Nuradeen Labaran Tanko1, Auwal Shehu Tijjani 2
Keywords
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