Effect of Chromium Content on the Properties of a Microspherical Alumina-Chromium Catalyst for Isobutane Dehydrogenation Prepared with the Use of a Centrifugal Thermal Activation Product of Gibbsite
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Translated
|
| Journal |
Kinetics and Catalysis
ISSN: 0023-1584
, E-ISSN: 1608-3210
|
| Output data |
Year: 2010,
Volume: 51,
Number: 6,
Pages: 898-906
Pages count
: 9
DOI:
10.1134/S0023158410060169
|
| Authors |
Nemykina E.I.
1
,
Pakhomov N.A.
1
,
Danilevich V.V.
1
,
Rogov V.A.
1
,
Zaikovskii V.I.
1
,
Larina T.V.
1
,
Molchanov V.V.
1
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis SB RAS
|
|
The states of chromium in both promoted and unpromoted alumina-chromium catalysts with various chromium contents prepared with the use of a centrifugal thermal activation product of gibbsite were studied in detail. The presence of five chromium species was found in the catalysts of this type: two Cr6+ and three Cr3+ species. The concentration of each particular chromium species depends on the total chromium content of the catalyst. Based on the experimental data, we hypothesized that highly disperse Cr3+ particles, the formation of which was completed at a chromium content of ∼7–9 wt %, are responsible for the catalytic activity of alumina-chromium samples in the reaction of isobutane dehydrogenation.