Monitoring Transport Phenomena of Paramagnetic Metal-Ion Complexes Inside Catalyst Bodies with Magnetic Resonance Imaging Full article
| Journal |
Chemistry - A European Journal
ISSN: 0947-6539 , E-ISSN: 1521-3765 |
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| Output data | Year: 2008, Volume: 14, Number: 8, Pages: 2363-2374 Pages count : 12 DOI: 10.1002/chem.200700990 | ||||||
| Tags | Cobalt, Magnetic resonance imaging, Supported catalysts, UV/Vis spectroscopy | ||||||
| Authors |
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| Affiliations |
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Funding (9)
| 1 | Russian Foundation for Basic Research | 05-03-32472 |
| 2 | Президиум РАН | 5.1.1 |
| 3 | Президиум РАН | 5.2.3 |
| 4 | Siberian Branch of the Russian Academy of Sciences | 11 |
| 5 | Council for Grants of the President of the Russian Federation | МК-5135.2007.3 |
| 6 | Council for Grants of the President of the Russian Federation | НШ-4821.2006.3 |
| 7 | Russian Science Support Foundation | |
| 8 | Albemarle (Netherlands) | |
| 9 | Netherlands Organisation for Scientific Research | NWO-CW-VICI |
Abstract:
An indirect magnetic resonance imaging (MRI) method has been developed to determine in a noninvasive
manner the distribution of paramagnetic Co2+ complexes inside Co/Al2O3 catalyst extrudates after impregnation
with Co2+/citrate solutions of different pH and citrate concentrations. UV/Vis/NIR microspectroscopic measurements were carried out simultaneously to obtain complementary information on the nature of the Co2+ complexes. In this way, it could be confirmed that the actual distribution of Co2+ inside the extrudates could be derived from the MRI images. By combining these space- and time-resolved techniques, information was obtained on both the strength and the mode of interaction between [Co(H2O)6] 2+ and different Co2+ citrate complexes with the Al2O3 support. Complexation of Co2+ by citrate was found to lead to a stronger interaction of Co with the support surface and formation of an eggshell distribution of Co2+ complexes after impregnation. By addition of free citrate and by changing the pH of the impregnation solution, it was possible to obtain the rather uncommon eggyolk and egg-white distributions of Co2+ inside the extrudates after impregnation. In other words, by carefully altering the chemical composition and pH of the impregnation solution, the macrodistribution of Co2+ complexes inside catalyst extrudates could be fine-tuned from eggshell over egg white and egg yolk to uniform.
Cite:
Bergwerff J.A.
, Lysova A.A.
, Espinosa-Alonso L.
, Koptyug I.V.
, Weckhuysen B.M.
Monitoring Transport Phenomena of Paramagnetic Metal-Ion Complexes Inside Catalyst Bodies with Magnetic Resonance Imaging
Chemistry - A European Journal. 2008.
V.14. N8. P.2363-2374. DOI: 10.1002/chem.200700990
WOS
Scopus
РИНЦ
ANCAN
OpenAlex
Monitoring Transport Phenomena of Paramagnetic Metal-Ion Complexes Inside Catalyst Bodies with Magnetic Resonance Imaging
Chemistry - A European Journal. 2008.
V.14. N8. P.2363-2374. DOI: 10.1002/chem.200700990
WOS
Scopus
РИНЦ
ANCAN
OpenAlex
Files:
Full text from publisher
Dates:
| Submitted: | Jun 29, 2007 |
| Published online: | Jan 7, 2008 |
| Published print: | Mar 7, 2008 |
Identifiers:
| Web of science: | WOS:000254186800006 |
| Scopus: | 2-s2.0-43949083782 |
| Elibrary: | 13583507 |
| Chemical Abstracts: | 2008:507767 |
| Chemical Abstracts (print): | 149:23183 |
| OpenAlex: | W2131388718 |