Stability and performance of supported Fe-V-oxide catalysts in methanol oxidation
(2009) In Journal of Catalysis 266(2). p.218-227- Abstract
- As the commercial Fe-Mo-oxide catalyst for methanol oxidation to formaldehyde suffers from deactivation by Mo volatilization, alternative catalysts are of interest. Therefore, TiO2-, alpha-Al2O3- and SiO2-supported (Fe)-V-O catalysts were prepared with loading up to 30 μmol of each metal per msq. surface area of the support. The samples were activity tested using a high inlet concentration of methanol (10 vol.%) and were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XANES). The activity measurements show that the preparations with the highest loads of V give the best performance. With regard to the support, the activity of the supported catalysts decreases in the order... (More)
- As the commercial Fe-Mo-oxide catalyst for methanol oxidation to formaldehyde suffers from deactivation by Mo volatilization, alternative catalysts are of interest. Therefore, TiO2-, alpha-Al2O3- and SiO2-supported (Fe)-V-O catalysts were prepared with loading up to 30 μmol of each metal per msq. surface area of the support. The samples were activity tested using a high inlet concentration of methanol (10 vol.%) and were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XANES). The activity measurements show that the preparations with the highest loads of V give the best performance. With regard to the support, the activity of the supported catalysts decreases in the order TiO2 > Al2O3 > SiO2. According to XPS the surface concentration of V decreases in the same order, confirming that vanadium is an active element. At high methanol conversion, the selectivity to formaldehyde decreases from 90% to 80% in the sequence unsupported FeVO4 > (Fe)VOx/TiO2 = (Fe)VOx/Al2O3 > FeVOx/SiO2 > VOx/SiO2. Iron has only a small effect on the catalytic performance, whereas it has a stabilizing effect on vanadium decreasing its volatility. However, compared with bulk FeVO4, volatilization experiments reveal that the volatilization of V from the supported (Fe)-V-oxide is much severer due to the dispersion and the comparatively low amount of active metal. Our data demonstrate that neither supported V-oxide nor supported Fe-V-oxide is suitable as catalyst in the industrial scale production of formaldehyde by methanol oxidation. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1465095
- author
- Häggblad, Robert LU ; Massa, Mariano LU and Andersson, Arne LU
- organization
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- TiO2, SiO2, alpha-Al2O3, Supported Fe-V-oxide, Formaldehyde, Selective oxidation, Methanol, XRD, XPS, XANES, Volatility
- in
- Journal of Catalysis
- volume
- 266
- issue
- 2
- pages
- 218 - 227
- publisher
- Elsevier
- external identifiers
-
- wos:000270116300007
- scopus:68749085768
- ISSN
- 1090-2694
- DOI
- 10.1016/j.jcat.2009.06.010
- language
- English
- LU publication?
- yes
- id
- 5b61379e-84b7-434c-94b2-b0e18ed3f4c9 (old id 1465095)
- date added to LUP
- 2016-04-01 12:23:51
- date last changed
- 2025-04-04 14:20:15
@article{5b61379e-84b7-434c-94b2-b0e18ed3f4c9,
abstract = {{As the commercial Fe-Mo-oxide catalyst for methanol oxidation to formaldehyde suffers from deactivation by Mo volatilization, alternative catalysts are of interest. Therefore, TiO2-, alpha-Al2O3- and SiO2-supported (Fe)-V-O catalysts were prepared with loading up to 30 μmol of each metal per msq. surface area of the support. The samples were activity tested using a high inlet concentration of methanol (10 vol.%) and were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XANES). The activity measurements show that the preparations with the highest loads of V give the best performance. With regard to the support, the activity of the supported catalysts decreases in the order TiO2 > Al2O3 > SiO2. According to XPS the surface concentration of V decreases in the same order, confirming that vanadium is an active element. At high methanol conversion, the selectivity to formaldehyde decreases from 90% to 80% in the sequence unsupported FeVO4 > (Fe)VOx/TiO2 = (Fe)VOx/Al2O3 > FeVOx/SiO2 > VOx/SiO2. Iron has only a small effect on the catalytic performance, whereas it has a stabilizing effect on vanadium decreasing its volatility. However, compared with bulk FeVO4, volatilization experiments reveal that the volatilization of V from the supported (Fe)-V-oxide is much severer due to the dispersion and the comparatively low amount of active metal. Our data demonstrate that neither supported V-oxide nor supported Fe-V-oxide is suitable as catalyst in the industrial scale production of formaldehyde by methanol oxidation.}},
author = {{Häggblad, Robert and Massa, Mariano and Andersson, Arne}},
issn = {{1090-2694}},
keywords = {{TiO2; SiO2; alpha-Al2O3; Supported Fe-V-oxide; Formaldehyde; Selective oxidation; Methanol; XRD; XPS; XANES; Volatility}},
language = {{eng}},
number = {{2}},
pages = {{218--227}},
publisher = {{Elsevier}},
series = {{Journal of Catalysis}},
title = {{Stability and performance of supported Fe-V-oxide catalysts in methanol oxidation}},
url = {{http://dx.doi.org/10.1016/j.jcat.2009.06.010}},
doi = {{10.1016/j.jcat.2009.06.010}},
volume = {{266}},
year = {{2009}},
}