Advanced

Catalytic and structural effects of W-substitution in M2 Mo-V-Te-oxide for propene ammoxidation

Holmberg, Johan LU ; Wagner, Jakob LU ; Häggblad, Robert LU ; Hansen, Staffan LU ; Wallenberg, Reine LU and Andersson, Arne LU (2007) In Catalysis Today 128(3-4). p.153-160
Abstract
Substitution of W for the Mo in M2-type Mo-V-Te-oxide was investigated. XRD, FTIR, XANES, and HRTEM verified that the substitution is possible in the whole range up to complete replacement of Mo by W. Catalytic measurements for propene ammoxidation show that both the specific activity and the selectivity to acrylonitrile pass through a maximum with increase of the W-content of the catalyst. XRD analysis indicates that the catalytic results, in part, can be explained by a disordered distribution of Mo, W, and V among the octahedral sites in M2 giving better catalytic performance than a more ordered arrangement does. Moreover, SEM and HRTEM imaging show that with increasing W-content, the M2 crystals change from μm-sized elongated crystals... (More)
Substitution of W for the Mo in M2-type Mo-V-Te-oxide was investigated. XRD, FTIR, XANES, and HRTEM verified that the substitution is possible in the whole range up to complete replacement of Mo by W. Catalytic measurements for propene ammoxidation show that both the specific activity and the selectivity to acrylonitrile pass through a maximum with increase of the W-content of the catalyst. XRD analysis indicates that the catalytic results, in part, can be explained by a disordered distribution of Mo, W, and V among the octahedral sites in M2 giving better catalytic performance than a more ordered arrangement does. Moreover, SEM and HRTEM imaging show that with increasing W-content, the M2 crystals change from μm-sized elongated crystals to spherical crystals of nm-size, influencing the type of surfaces being exposed and consequently the catalytic properties. Among the catalysts investigated, a catalyst with the composition (Mo0.3W0.7)1.9V1.0Te1.1O10 is the most active and selective one, giving 80% selectivity to acrylonitrile. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Ammoxidation, Mo-V-W-Te-oxide catalysts, M2-phase, W-substitution, XRD, SEM, XANES, Acrylonitrile, Propene, HRTEM
in
Catalysis Today
volume
128
issue
3-4
pages
153 - 160
publisher
Elsevier
external identifiers
  • wos:000250840600007
  • scopus:35248888131
ISSN
0920-5861
DOI
10.1016/j.cattod.2007.06.073
language
English
LU publication?
yes
id
595db5aa-4aa8-4bca-b9dd-5a3fa4ebd2b4 (old id 638913)
date added to LUP
2007-12-03 12:08:33
date last changed
2017-11-05 04:21:37
@article{595db5aa-4aa8-4bca-b9dd-5a3fa4ebd2b4,
  abstract     = {Substitution of W for the Mo in M2-type Mo-V-Te-oxide was investigated. XRD, FTIR, XANES, and HRTEM verified that the substitution is possible in the whole range up to complete replacement of Mo by W. Catalytic measurements for propene ammoxidation show that both the specific activity and the selectivity to acrylonitrile pass through a maximum with increase of the W-content of the catalyst. XRD analysis indicates that the catalytic results, in part, can be explained by a disordered distribution of Mo, W, and V among the octahedral sites in M2 giving better catalytic performance than a more ordered arrangement does. Moreover, SEM and HRTEM imaging show that with increasing W-content, the M2 crystals change from μm-sized elongated crystals to spherical crystals of nm-size, influencing the type of surfaces being exposed and consequently the catalytic properties. Among the catalysts investigated, a catalyst with the composition (Mo0.3W0.7)1.9V1.0Te1.1O10 is the most active and selective one, giving 80% selectivity to acrylonitrile.},
  author       = {Holmberg, Johan and Wagner, Jakob and Häggblad, Robert and Hansen, Staffan and Wallenberg, Reine and Andersson, Arne},
  issn         = {0920-5861},
  keyword      = {Ammoxidation,Mo-V-W-Te-oxide catalysts,M2-phase,W-substitution,XRD,SEM,XANES,Acrylonitrile,Propene,HRTEM},
  language     = {eng},
  number       = {3-4},
  pages        = {153--160},
  publisher    = {Elsevier},
  series       = {Catalysis Today},
  title        = {Catalytic and structural effects of W-substitution in M2 Mo-V-Te-oxide for propene ammoxidation},
  url          = {http://dx.doi.org/10.1016/j.cattod.2007.06.073},
  volume       = {128},
  year         = {2007},
}