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Characterization of a chromia–alumina catalyst using small‐angle neutron scattering
Author(s) -
Acharya D. R.,
Crowley T. L.,
Hughes R.,
Koon C. L.,
Menendez M.,
Rieutord F.
Publication year - 1990
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889890006483
Subject(s) - chromia , scattering , small angle neutron scattering , neutron scattering , fractal dimension , small angle scattering , characterization (materials science) , biological small angle scattering , materials science , neutron , optics , condensed matter physics , molecular physics , chemistry , catalysis , fractal , physics , nuclear physics , mathematics , organic chemistry , mathematical analysis
Neutron scattering has been employed to study the pore structure of a chromia–alumina catalyst. The results indicated the existence of three distinct scattering regimes with distinct slopes corresponding to the values of the wavevector, Q . The analysis of the scattering in these regions suggested that the large‐ Q region corresponds to Porod's law scattering and provides information on the specific surface area. The intermediate Q region arises from scattering from hollow capillaries and provides information on the dimension of the capillaries. The small‐ Q behaviour arises from the relative spatial arrangement of capillaries, which appear to form a `fractal' network.