Determination of the percolation properties and pore connectivity for mesoporous solids using NMR cryodiffusometry
Perkins, E. L., Lowe, J. P., Edler, K. J., Tanko, N. and Rigby, S. P., 2008. Determination of the percolation properties and pore connectivity for mesoporous solids using NMR cryodiffusometry. Chemical Engineering Science, 63 (7), pp. 1929-1940.
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Using a model disordered mesoporous solid with a spatial arrangement of pore sizes analogous to a macroscopic ink-bottle, the hysteresis obsd. in NMR cryoporometry can be deconvoluted into sep. single pore and pore-blocking contributions. The suggestion of pore-blocking effects was confirmed using PFG NMR. Hence, percolation theory was used, for the 1st time with cryoporometry, to analyze the pore-blocking contribution to the hysteresis to det. the accessibility function and pore connectivity of the void space of a mesoporous sol-gel SiO2 catalyst support pellet. NMR cryoporometry can be used to obtain a full range of void space descriptors, and thus offers a full, and potentially better understood, complementary pore structure characterization method to gas sorption and Hg porosimetry.
|Creators||Perkins, E. L., Lowe, J. P., Edler, K. J., Tanko, N. and Rigby, S. P.|
|Uncontrolled Keywords||percolation, mesoporous materials, pore size, percolation pore connectivity mesoporous silica catalyst nmr cryodiffusometry, pore structure (detn. of percolation properties and pore connectivity for mesoporous solids using nmr cryodiffusometry), nmr|
|Departments||Faculty of Engineering & Design > Chemical Engineering|
Faculty of Science > Chemistry
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