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Activity and in situ DRIFT studies on vanadia catalysts during oxidative dehydrogenation of sulfur-contaminated methanol

Koivikko, Niina ; Ojala, Satu ; Laitinen, Tiina ; Lopes da Silva, Felipe LU ; Hautala, Lauri ; El Assal, Zouhair ; Honkanen, Mari ; Vippola, Minnamari ; Huuhtanen, Mika and Huttula, Marko , et al. (2022) In Applied Catalysis B: Environmental 318.
Abstract

Silica-titania (70/30) supported vanadium catalysts were prepared, characterized, and studied in oxidative dehydrogenation of sulfur-contaminated methanol. The quality of vanadia species is dependent on temperature and gas conditions during preparation, support type, support specific surface area and VOx surface density. For example, upon heating the amount of V2O5 decrease along with formation of polymeric species. Such changes may occur also during the catalytic reaction. The reaction experiments and characterization results showed that the stability of polymeric vanadia species and total acidity has a connection with better formaldehyde production performance. The best performance was observed for... (More)

Silica-titania (70/30) supported vanadium catalysts were prepared, characterized, and studied in oxidative dehydrogenation of sulfur-contaminated methanol. The quality of vanadia species is dependent on temperature and gas conditions during preparation, support type, support specific surface area and VOx surface density. For example, upon heating the amount of V2O5 decrease along with formation of polymeric species. Such changes may occur also during the catalytic reaction. The reaction experiments and characterization results showed that the stability of polymeric vanadia species and total acidity has a connection with better formaldehyde production performance. The best performance was observed for N2-calcined silica-titania catalyst. Easy reducibility of the catalyst, as in the case of reference catalysts, leads to further oxidation of formaldehyde.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
AP-XPS, Environmental catalysis, in situ DRIFT, in situ Raman, VOC utilization
in
Applied Catalysis B: Environmental
volume
318
article number
121803
publisher
Elsevier
external identifiers
  • scopus:85135770622
ISSN
0926-3373
DOI
10.1016/j.apcatb.2022.121803
language
English
LU publication?
yes
id
e15bf281-db99-4922-85ce-72d9b9357256
date added to LUP
2022-11-29 12:39:43
date last changed
2022-11-30 11:11:25
@article{e15bf281-db99-4922-85ce-72d9b9357256,
  abstract     = {{<p>Silica-titania (70/30) supported vanadium catalysts were prepared, characterized, and studied in oxidative dehydrogenation of sulfur-contaminated methanol. The quality of vanadia species is dependent on temperature and gas conditions during preparation, support type, support specific surface area and VO<sub>x</sub> surface density. For example, upon heating the amount of V<sub>2</sub>O<sub>5</sub> decrease along with formation of polymeric species. Such changes may occur also during the catalytic reaction. The reaction experiments and characterization results showed that the stability of polymeric vanadia species and total acidity has a connection with better formaldehyde production performance. The best performance was observed for N<sub>2</sub>-calcined silica-titania catalyst. Easy reducibility of the catalyst, as in the case of reference catalysts, leads to further oxidation of formaldehyde.</p>}},
  author       = {{Koivikko, Niina and Ojala, Satu and Laitinen, Tiina and Lopes da Silva, Felipe and Hautala, Lauri and El Assal, Zouhair and Honkanen, Mari and Vippola, Minnamari and Huuhtanen, Mika and Huttula, Marko and Maunula, Teuvo and Keiski, Riitta L.}},
  issn         = {{0926-3373}},
  keywords     = {{AP-XPS; Environmental catalysis; in situ DRIFT; in situ Raman; VOC utilization}},
  language     = {{eng}},
  month        = {{12}},
  publisher    = {{Elsevier}},
  series       = {{Applied Catalysis B: Environmental}},
  title        = {{Activity and in situ DRIFT studies on vanadia catalysts during oxidative dehydrogenation of sulfur-contaminated methanol}},
  url          = {{http://dx.doi.org/10.1016/j.apcatb.2022.121803}},
  doi          = {{10.1016/j.apcatb.2022.121803}},
  volume       = {{318}},
  year         = {{2022}},
}