Topic: Quantifying the basicity of reconstructed layered double hydroxides and correlating this with their performance in base-catalysed reactions
Funding: Czech Science Foundation - 19-22978S
Duration: 2019-2021
Goal: Advanced analysis of the changes in the structural/acid-base properties during the formation of (supported) reconstructed LDHs using in-situ techniques and elucidation of the relationship between the properties of the (supported) reconstructed LDHs and their catalytic performance and stability.
Abstract: The main aim of the project is to provide fundamental understanding of the relationship between the structural/textural/acid-base properties and the catalytic performance (activity/stability) of the reconstructed layered double hydroxides, LDHs, (in both bulk and supported forms). We aim to elucidate which of the basic sites possess superior activity in the aldol condensation of furfural and how to maximize their number. To achieve this ambitious goal, we have set the following specific objectives: (i) To describe the changes of structural/acid-base properties during the transformation of mixed oxides into the reconstructed LDHs using suitable in-situ techniques, (ii) To determine the influence of the support on the structural/acid-base properties of reconstructed LDHs supported on alumina, (iii) To elucidate the relationship between the structural/acid-base properties of the (supported) reconstructed LDHs and their catalytic performance (mainly activity and its long-term stability).
Project partner: University of Pardubice
Articles
Korolova V., Kikhtyanin O., Ruiz-Zepeda F., Lhotka M., Veselý M., Kubička D.: Fading memory of MgAl hydrotalcites at mild rehydration conditions deteriorates their performance in aldol condensation. Applied Catalysis A: General 632, 25 February 2022, 118482
Dubnová L., Daňhel R., Meinhardová V., Korolova V., Smoláková L., Kondratowicz T., Kikhtyanin O., Čapek L.: Reconstruction of the ZnAl Mixed Oxides Into the Layered Double Hydroxide Catalysts Active in the Aldol Condensation of Furfural: The Role of ZnO Particles. Front. Chem. 9:803764.
Dubnová L., Smoláková L., Kikhtyan O., Kocík J., Kubička D., Zvolská M., Pouzara M., Čapek L.: The role of ZnO in the catalytic behaviour of Zn-Al mixed oxides in aldol condensation of furfural with acetone. Catalysis Today (379), 181-191
Korolova, V., Kikhtyanin, O., Veselý, M., Vrtiška, D., Paterová, I., Fíla, V., Čapek, L., Kubička, D.: On the Effect of the M3+ Origin on the Properties and Aldol Condensation Performance of MgM3+ Hydrotalcites and Mixed Oxides. Catalysts 2021, 11, 992
O. Kikhtyanin, V. Korolova, A. Spencer, L. Dubnová, B. Shumeiko, D. Kubička, On the influence of acidic admixtures in furfural on the performance of MgAl mixed oxide catalysts in aldol condensation of furfural and acetone, Catalysis Today, 2020, in press
Kikhtyanin, O., Čapek, L., Tišler, Z., Velvarská, R., Panasewicz, A., Diblíková, P., Kubička, D. Physico-chemical properties of MgGa mixed oxides and reconstructed layered double hydroxides and their performance in aldol condensation of furfural and acetone (2018) Frontiers in Chemistry, 6 (MAY), 176.
Kikhtyanin, O., Kadlec, D., Velvarská, R., Kubička, D. Using Mg-Al Mixed Oxide and Reconstructed Hydrotalcite as Basic Catalysts for Aldol Condensation of Furfural and Cyclohexanone (2018) ChemCatChem, 10 (6), pp. 1464-1475.
Kikhtyanin, O., Ganjkhanlou, Y., Kubička, D., Bulánek, R., Čejka, J. Characterization of potassium-modified FAU zeolites and their performance in aldol condensation of furfural and acetone (2018) Applied Catalysis A: General, 549, pp. 8-18.
Kikhtyanin, O., Čapek, L., Smoláková, L., Tišler, Z., Kadlec, D., Lhotka, M., Diblíková, P., Kubička, D. Influence of Mg-Al Mixed Oxide Compositions on Their Properties and Performance in Aldol Condensation (2017) Industrial and Engineering Chemistry Research, 56 (45), pp. 13411-13422.
Kikhtyanin, O., Tišler, Z., Velvarská, R., Kubička, D. Reconstructed Mg-Al hydrotalcites prepared by using different rehydration and drying time: Physico-chemical properties and catalytic performance in aldol condensation (2017) Applied Catalysis A: General, 536, pp. 85-96.
