Activity and <em>in situ</em> DRIFT studies on vanadia catalysts during oxidative dehydrogenation of sulfur-contaminated methanol
Koivikko, Niina; Ojala, Satu; Laitinen, Tiina; Lopes da Silva, Felipe; Hautala, Lauri; El Assal, Zouhair; Honkanen, Mari; Vippola, Minnamari; Huuhtanen, Mika; Huttula, Marko; Maunula, Teuvo; Keiski, Riitta L. (2022-08-02)
Koivikko, N.; Ojala, S.; Laitinen, T.; Lopes da Silva, F.; Hautala, L.; El Assal, Z.; Honkanen, M.; Vippola, M.; Huuhtanen, M.; Huttula, M.; et al. Activity and in Situ DRIFT Studies on Vanadia Catalysts during Oxidative Dehydrogenation of Sulfur-Contaminated Methanol. Appl. Catal. B Environ. 2022, 318, 121803.
© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
https://creativecommons.org/licenses/by/4.0/
https://urn.fi/URN:NBN:fi-fe2023060552519
Tiivistelmä
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 N2-calcined silica-titania catalyst. Easy reducibility of the catalyst, as in the case of reference catalysts, leads to further oxidation of formaldehyde.
Kokoelmat
- Avoin saatavuus [36502]
