Tiina Laitinen, Satu Ojala, Renaud Cousin, Niina Koivikko, Christophe Poupin, Zouhair El Assal, Atte Aho, Riitta L. Keiski, Activity, selectivity, and stability of vanadium catalysts in formaldehyde production from emissionsof volatile organic compounds, Journal of Industrial and Engineering Chemistry, Volume 83, 2020, Pages 375-386, ISSN 1226-086X, https://doi.org/10.1016/j.jiec.2019.12.011
Activity, selectivity, and stability of vanadium catalysts in formaldehyde production from emissionsof volatile organic compounds
|Author:||Laitinen, Tiina1; Ojala, Satu1; Cousin, Renaud2;|
1Environmental and Chemical Engineering (ECE), Faculty of Technology, University of Oulu, P.O. Box 4300, FI-90014, Finland
2Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV), Université du Littoral Côte d’Opale, Dunkerque, 59140, France
3Laboratory of Industrial Chemistry and Reaction Engineering, Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Biskopsgatan 8, Åbo, 20500, Finland
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2020040210167
|Publish Date:|| 2021-12-13
In this study, activity, selectivity and stability of vanadium catalysts supported on zirconia, hafnia, and alumina were examined in the oxidation of methanethiol and methanol to formaldehyde. The 3 wt-% vanadia–alumina catalyst with low VOx surface density showed the highest activity in the formaldehyde production. However, during the stability test, this catalyst deactivated due to the change in the oxidation state of vanadium from V5+ to V4+, decrease the amount of surface vanadium species and the formation of sulphates on the material surface. Zirconia and hafnia supported catalysts with high VOx surface density demonstrated better stability in the reaction conditions, but their activity in the formaldehyde production was lower. One reason for the lower activity might be the formation of metal-mixed oxide phases between vanadia and the support, which could also explain the decreased sulphur deposition on zirconia and hafnia after vanadium impregnation.
Journal of industrial and engineering chemistry
|Pages:||375 - 386|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
116 Chemical sciences
218 Environmental engineering
The financial support of Jenny and Antti Wihuri foundation, Finnish Cultural Foundation – North Ostrobothnia regional fund, Walter Ahlström foundation, Riitta and Jorma J. Takanen foundation and Academy of Finland through Electra project is acknowledged. Kaisu Ainassaari, Markus Riihimäki and Jorma Penttinen are acknowledged for their assistance in the characterisation of materials. Lucette Tidahy is acknowledged for the EPR measurements. The Center of Microscopy and Nanotechnology (CMNT) at the University of Oulu is acknowledged for the guidance in the STEM, EDS, and XPS analyses.
© 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.