Performance of ZrO2-supported Nb- and W-oxide in the gas-phase dehydration of glycerol to acrolein
Massa, Mariano LU ; Andersson, Arne LU ; Finocchio, Elisabetta ; Busca, Guido ; Lenrick, Filip LU
and Wallenberg, Reine
LU
(2013)
In Journal of Catalysis
297.
p.93-109
- Abstract
- Gas-phase dehydration of glycerol to acrolein is studied over tungsten and niobium oxide supported on monoclinic zirconia. Supported tungsten oxide is slightly better than supported niobia with initial yields to acrolein around 78% and 75%, respectively, at complete conversion of glycerol. No synergy is observed using mixed structures with W and Nb. The addition of oxygen to the feed has almost no effect on the yield to acrolein but reduces the deactivation rate. XPS and HRTEM imaging reveals that deactivation is due to formation of an amorphous layer on the surface, consisting of adsorbed high-boiling compounds and coke. Regeneration experiments show that the catalysts are effectively regenerated in flowing air. Characterization of the... (More)
- Gas-phase dehydration of glycerol to acrolein is studied over tungsten and niobium oxide supported on monoclinic zirconia. Supported tungsten oxide is slightly better than supported niobia with initial yields to acrolein around 78% and 75%, respectively, at complete conversion of glycerol. No synergy is observed using mixed structures with W and Nb. The addition of oxygen to the feed has almost no effect on the yield to acrolein but reduces the deactivation rate. XPS and HRTEM imaging reveals that deactivation is due to formation of an amorphous layer on the surface, consisting of adsorbed high-boiling compounds and coke. Regeneration experiments show that the catalysts are effectively regenerated in flowing air. Characterization of the catalysts with Raman, FTIR, and pyridine adsorption reveals that the active surface structure is polymeric oxide exposing W=O and/or Nb=O species and Bronsted acidic W OH and/or Nb OH groups. The results show that Bronsted acidic sites are required for the catalyst to be active and selective to acrolein. (c) 2012 Elsevier Inc. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3596044
- author
- Massa, Mariano
LU
; Andersson, Arne
LU
; Finocchio, Elisabetta
; Busca, Guido
; Lenrick, Filip
LU
and Wallenberg, Reine
LU
- organization
- publishing date
- 2013
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Glycerol, Dehydration, Oxidative dehydration, Acrolein, Acrylic acid, WO3/ZrO2, Nb2O5/ZrO2, Nb-W-O/ZrO2, Deactivation, Regeneration
- in
- Journal of Catalysis
- volume
- 297
- pages
- 93 - 109
- publisher
- Elsevier
- external identifiers
-
- wos:000314136500010
- scopus:84870899944
- ISSN
- 1090-2694
- DOI
- 10.1016/j.jcat.2012.09.021
- language
- English
- LU publication?
- yes
- id
- 8b70aca7-5553-4ae2-869b-3987000dcda9 (old id 3596044)
- date added to LUP
- 2016-04-01 11:07:11
- date last changed
- 2024-01-22 06:41:28
@article{8b70aca7-5553-4ae2-869b-3987000dcda9,
abstract = {{Gas-phase dehydration of glycerol to acrolein is studied over tungsten and niobium oxide supported on monoclinic zirconia. Supported tungsten oxide is slightly better than supported niobia with initial yields to acrolein around 78% and 75%, respectively, at complete conversion of glycerol. No synergy is observed using mixed structures with W and Nb. The addition of oxygen to the feed has almost no effect on the yield to acrolein but reduces the deactivation rate. XPS and HRTEM imaging reveals that deactivation is due to formation of an amorphous layer on the surface, consisting of adsorbed high-boiling compounds and coke. Regeneration experiments show that the catalysts are effectively regenerated in flowing air. Characterization of the catalysts with Raman, FTIR, and pyridine adsorption reveals that the active surface structure is polymeric oxide exposing W=O and/or Nb=O species and Bronsted acidic W OH and/or Nb OH groups. The results show that Bronsted acidic sites are required for the catalyst to be active and selective to acrolein. (c) 2012 Elsevier Inc. All rights reserved.}},
author = {{Massa, Mariano and Andersson, Arne and Finocchio, Elisabetta and Busca, Guido and Lenrick, Filip and Wallenberg, Reine}},
issn = {{1090-2694}},
keywords = {{Glycerol; Dehydration; Oxidative dehydration; Acrolein; Acrylic acid; WO3/ZrO2; Nb2O5/ZrO2; Nb-W-O/ZrO2; Deactivation; Regeneration}},
language = {{eng}},
pages = {{93--109}},
publisher = {{Elsevier}},
series = {{Journal of Catalysis}},
title = {{Performance of ZrO2-supported Nb- and W-oxide in the gas-phase dehydration of glycerol to acrolein}},
url = {{http://dx.doi.org/10.1016/j.jcat.2012.09.021}},
doi = {{10.1016/j.jcat.2012.09.021}},
volume = {{297}},
year = {{2013}},
}