Nanocomposites and nanomaterials
Effect of the composition of ZnO(Cu,Ag)/MgO(ZrO2)-SiO2 nanostructured systems on their catalytic properties in the ethanol-to-butadiene process
Kyriienko P.I.1, Larina O.V.1, Balakin D.Yu.2, Soloviev S.O.1, Orlyk S.M.1
1 L.V. Pisarzhevsky Institute of Physical Chemistry of the NAS of Ukraine. 31 Prosp. Nauky, Kyiv-03028, Ukraine
E-mail: pavlo_kyriienko@ukr.net
2 Institute of Physics of the NAS of Ukraine, Prospect Nauky, 46, Kyiv-03039, Ukraine.
Development of the effective catalysts for the new bioethanol based processes is one of the major focuses in the modern catalytic science. One such process is the production of 1,3-butadiene from bioethanol (ETB-process) [1]. 
The different nanostructured systems ZnO/MgO(ZrO2)-SiO2, included modified with Na, K, Cu, Ag, La, have been studded in the ETB-process. The method of catalyst preparation significantly affects its dehydrogenation and acid–base characteristics. It has been shown that Lewis acid sites formed in the contact zones of catalyst components (MgO/SiO2, ZrO2/SiO2, ZnO/SiO2) play an important role in 1,3-butadiene synthesis from ethanol. The selection of a modifying additive is important to increase the dehydrogenation capacity of the catalyst. The dopant affects not only the redox properties of the catalytic system, but also the acid–base characteristics. Optimization of the number and strength of dehydrogenation sites and aldol condensation sites on the catalyst surface led to achieve a high yield of 1,3-butadiene [1-4].

1.	Kyriienko P.I., Larina O.V., Soloviev S.O., Orlyk S.M. Catalytic conversion of ethanol ento 1,3-butadiene: achievements and prospects: a review // Theor Exp Chem.-2020.-56.-P. 213–242.
2.	Larina O.V., Shcherban N.D., Kyriienko P.I. et al. Design of effective catalysts based on ZnLaZrSi oxide systems for obtaining 1,3-butadiene from aqueous ethanol // ACS Sustain Chem Eng.-2020.-8.-P. 16600–16611.
3.	Kyriienko P.I., Larina O.V., Balakin D.Yu. et al. 1,3-Butadiene production from aqueous ethanol over ZnO/MgO-SiO2 // Appl Catal A.-2021.-616.-P 118081
4.	Kyriienko P.I., Larina O.V., Balakin D.Y., Sergiienko S.A., Soloviev S.O. Effect of the Composition of Silver Doped M-Si Oxide Systems (M: Mg, Zr, La) on their Catalytic Properties in the Conversion of Ethanol to 1,3-Butadiene // Theor Exp Chem.-2020.-56.-P. 33–38.