Determination of the percolation properties and pore connectivity for mesoporous solids using NMR cryodiffusometry
Perkins, Emily L. ; Lowe, John P. ; Edler, Karen J. LU
; Tanko, Nuradeen
and Rigby, Sean P.
(2008)
In Chemical Engineering Science
63(7).
p.1929-1940
- Abstract
Using a model disordered mesoporous solid with a spatial arrangement of pore sizes analogous to a macroscopic 'ink-bottle', it has been shown that the hysteresis observed in NMR cryoporometry can be deconvoluted into separate single pore and pore-blocking contributions. The suggestion of pore-blocking effects has been confirmed using PFG NMR. Hence, percolation theory has been used, for the first time with cryoporometry, to analyse the pore-blocking contribution to the hysteresis to determine the accessibility function and pore connectivity of the void space of a mesoporous sol-gel silica catalyst support pellet. This work demonstrates that NMR cryoporometry can be used to obtain a full range of void space descriptors, and thus offers a... (More)
Using a model disordered mesoporous solid with a spatial arrangement of pore sizes analogous to a macroscopic 'ink-bottle', it has been shown that the hysteresis observed in NMR cryoporometry can be deconvoluted into separate single pore and pore-blocking contributions. The suggestion of pore-blocking effects has been confirmed using PFG NMR. Hence, percolation theory has been used, for the first time with cryoporometry, to analyse the pore-blocking contribution to the hysteresis to determine the accessibility function and pore connectivity of the void space of a mesoporous sol-gel silica catalyst support pellet. This work demonstrates that 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 characterisation method to gas sorption and mercury porosimetry.
(Less)
- author
- Perkins, Emily L.
; Lowe, John P.
; Edler, Karen J.
LU
; Tanko, Nuradeen
and Rigby, Sean P.
- publishing date
- 2008-04
- type
- Contribution to journal
- publication status
- published
- keywords
- Catalyst support, NMR cryoporometry, PFG NMR, Phase change, Porous media, Voidage
- in
- Chemical Engineering Science
- volume
- 63
- issue
- 7
- pages
- 12 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:40849097483
- ISSN
- 0009-2509
- DOI
- 10.1016/j.ces.2007.12.022
- language
- English
- LU publication?
- no
- id
- e3641ba3-ec8a-4a40-b718-1690f76fb441
- date added to LUP
- 2023-05-04 19:00:40
- date last changed
- 2023-06-13 08:25:09
@article{e3641ba3-ec8a-4a40-b718-1690f76fb441,
abstract = {{<p>Using a model disordered mesoporous solid with a spatial arrangement of pore sizes analogous to a macroscopic 'ink-bottle', it has been shown that the hysteresis observed in NMR cryoporometry can be deconvoluted into separate single pore and pore-blocking contributions. The suggestion of pore-blocking effects has been confirmed using PFG NMR. Hence, percolation theory has been used, for the first time with cryoporometry, to analyse the pore-blocking contribution to the hysteresis to determine the accessibility function and pore connectivity of the void space of a mesoporous sol-gel silica catalyst support pellet. This work demonstrates that 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 characterisation method to gas sorption and mercury porosimetry.</p>}},
author = {{Perkins, Emily L. and Lowe, John P. and Edler, Karen J. and Tanko, Nuradeen and Rigby, Sean P.}},
issn = {{0009-2509}},
keywords = {{Catalyst support; NMR cryoporometry; PFG NMR; Phase change; Porous media; Voidage}},
language = {{eng}},
number = {{7}},
pages = {{1929--1940}},
publisher = {{Elsevier}},
series = {{Chemical Engineering Science}},
title = {{Determination of the percolation properties and pore connectivity for mesoporous solids using NMR cryodiffusometry}},
url = {{http://dx.doi.org/10.1016/j.ces.2007.12.022}},
doi = {{10.1016/j.ces.2007.12.022}},
volume = {{63}},
year = {{2008}},
}