Skip navigation
Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2612
Title: Effect of calcination temperature during the synthesis of Co/Al 2O3 catalyst used for the hydrogenation of CO2
Authors: Das T.
Sengupta S.
Deo G.
Published in: Reaction Kinetics, Mechanisms and Catalysis
Abstract: Alumina supported and unsupported cobalt catalysts were synthesized, characterized and studied for the CO2 hydrogenation reaction under in situ conditions with simultaneous reactivity measurements to determine the effect of calcination temperature during catalyst preparation. In situ reduction of calcined alumina supported cobalt and unsupported cobalt oxide catalysts revealed that the reduction of the unsupported Co3O4 sample occurred more rapidly and proceeded by the intermediate formation of CoO. The reduction of the calcined alumina supported cobalt catalyst was more difficult and depended on the pre-calcination temperature. The formation of CoO was not observed. In situ reduction of the dried alumina supported cobalt catalysts at 823 K revealed the presence of Co2+ tetrahedral species by UV- Vis-NIR spectroscopy. In situ DRIFTS with simultaneous reactivity measurements of the CO2 hydrogenation reaction revealed that the most suitable calcination temperature for alumina supported cobalt catalysts was 473 K, followed by reduction in H2 at 823 K. Higher calcination temperatures gave rise to stronger cobalt oxide alumina interactions and a loss of activity. Lower calcination temperatures gave rise to a difficult to reduce Co2+ tetrahedral species. Thus, the calcination temperature plays an important role in the synthesis of active alumina supported cobalt catalyst. © Akadémiai Kiadó, Budapest, Hungary 2013.
Citation: Reaction Kinetics, Mechanisms and Catalysis (2013), 110(1): 147-162
URI: https://doi.org/10.1007/s11144-013-0592-z
http://repository.iitr.ac.in/handle/123456789/2612
Issue Date: 2013
Keywords: Alumina
Calcination temperature
Cobalt
DRIFTS
H2-TPR
UV-Vis-NIR
XRD
ISSN: 18785190
Author Scopus IDs: 7201461586
55242126400
7003292237
Author Affiliations: Das, T., Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
Sengupta, S., Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
Deo, G., Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
Corresponding Author: Deo, G.; Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India; email: goutam@iitk.ac.in
Appears in Collections:Journal Publications [CH]

Files in This Item:
There are no files associated with this item.
Show full item record


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.