Magnetic Resonance Imaging Studies on Catalyst Impregnation Processes: Discriminating Metal Ion Complexes within Millimeter-Sized γ-Al2O3 Catalyst Bodies | Sciact - CRIS-system of Boreskov Institute of Catalysis

Magnetic Resonance Imaging Studies on Catalyst Impregnation Processes: Discriminating Metal Ion Complexes within Millimeter-Sized γ-Al2O3 Catalyst Bodies Full article

Journal

Journal of the American Chemical Society
ISSN: 0002-7863 , E-ISSN: 1520-5126

Output data

Year: 2009, Volume: 131, Number: 18, Pages: 6525-6534 Pages count : 10 DOI: 10.1021/ja900346k

Tags

Aluminum; Catalysis; Catalysts; Coordination reactions; Industrial applications; Magnetic resonance; Magnetic resonance imaging; Metal ions; Nickel

Authors

Espinosa-Alonso Leticia ¹ , Lysova Anna A. ^2,3 , de Peinder Peter ^1,4 , de Jong Krijn P. ¹ , Koptyug Igor V. ² , Weckhuysen Bert M. ¹

Affiliations

1	Inorganic Chemistry and Catalysis group, Department of Chemistry, Faculty of Science, Utrecht University, Sorbonnelaan 16, 3508 TB Utrecht, The Netherlands
2	International Tomography Center SB RAS, Institutskaya Street 3A, Novosibirsk 630090, Russia
3	Boreskov Institute of Catalysis SB RAS, Pr. ac. Lavrentieva 5, Novosibirsk 630090, Russia
4	VibSpec, Haaftenlaan 28, 4006 XL Tiel, The Netherlands

Funding (6)

1	Russian Foundation for Basic Research	07-03-12147
2	Russian Foundation for Basic Research	08-03-00661
3	Russian Foundation for Basic Research	08-03-91102
4	Президиум РАН	5.1.1
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-3604.2008.3

Magnetic resonance imaging (MRI) was used to study the impregnation step during the preparation of Ni/γ-Al2O3 hydrogenation catalysts with Ni2+ metal ion present in different coordinations. The precursor complexes were [Ni(H2O)6]2+ and [Ni(edtaHx)](2−x)− (where x = 0, 1, 2 and edta = ethylenediaminetetraacetic acid), representing a nonshielded and a shielded paramagnetic complex, respectively. Due to this shielding effect of the ligands, the dynamics of [Ni(H2O)6]2+ or [Ni(edtaHx)](2−x)− were visualized applying T2 or T1 image contrast, respectively. MRI was applied in a quantitative manner to calculate the [Ni(H2O)6]2+ concentration distribution after impregnation when it was present alone in the impregnation solution, or together with the [Ni(edtaHx)](2−x)− species. Moreover, the combination of MRI with UV−vis microspectroscopy allowed the visualization of both species with complementary information on the dynamics and adsorption/desorption phenomena within γ-Al2O3 catalyst bodies. These phenomena yielded nonuniform Ni distributions after impregnation, which are interesting for certain industrial applications.

Espinosa-Alonso L. , Lysova A.A. , de Peinder P. , de Jong K.P. , Koptyug I.V. , Weckhuysen B.M.
Magnetic Resonance Imaging Studies on Catalyst Impregnation Processes: Discriminating Metal Ion Complexes within Millimeter-Sized γ-Al2O3 Catalyst Bodies
Journal of the American Chemical Society. 2009. V.131. N18. P.6525-6534. DOI: 10.1021/ja900346k WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	Jan 16, 2009
Published online:	Apr 22, 2009
Published print:	May 13, 2009

Web of science:	WOS:000265939200054
Scopus:	2-s2.0-70149105022
Elibrary:	41743520
Chemical Abstracts:	2009:485313
Chemical Abstracts (print):	150:432685
OpenAlex:	W2106944434

DB	Citing
Web of science	37
Scopus	39
Elibrary	38
OpenAlex	40