dc.contributor.author |
Egorova S. |
|
dc.contributor.author |
Bekmukhamedov G. |
|
dc.contributor.author |
Lamberov A. |
|
dc.date.accessioned |
2018-09-18T20:05:45Z |
|
dc.date.available |
2018-09-18T20:05:45Z |
|
dc.date.issued |
2013 |
|
dc.identifier.issn |
0023-1584 |
|
dc.identifier.uri |
https://dspace.kpfu.ru/xmlui/handle/net/136451 |
|
dc.description.abstract |
The crystal and pore structures of a microspherical alumina-chromium catalyst calcined at 800-1100 C were studied using a set of currently available physicochemical techniques (X-ray diffraction, lowtemperature nitrogen adsorption, diffuse reflectance UV-vis spectroscopy, Raman spectroscopy, and EPR spectroscopy); the state of its active component and the catalytic properties in isobutane dehydrogenation were examined. As the calcination temperature was increased from 800 to 900-1000 C, the properties of the catalyst were improved as a result of the formation of Cr2O3 clusters in an optimum amount and a decrease in the surface acidity of the catalyst due to the dehydroxylation and phase transformations of the aluminum oxide support. Calcination at 1100 C was accompanied by a decrease in the yield of isobutylene as a result of the formation of inactive macrocrystalline chromium (III) oxide and a chromium species inaccessible to reacting molecules; this chromium species was encapsulated in closed pores as the constituent of a solid solution of α-Al2O3-Cr2O3. © 2013 Pleiades Publishing, Ltd. |
|
dc.relation.ispartofseries |
Kinetics and Catalysis |
|
dc.title |
Effect of high-temperature treatment on the properties of an alumina-chromium catalyst for the dehydrogenation of lower paraffins |
|
dc.type |
Article |
|
dc.relation.ispartofseries-issue |
1 |
|
dc.relation.ispartofseries-volume |
54 |
|
dc.collection |
Публикации сотрудников КФУ |
|
dc.relation.startpage |
49 |
|
dc.source.id |
SCOPUS00231584-2013-54-1-SID84873350780 |
|