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Registration Number

0224U032771, (0123U102607) , R & D reports

Title

Design of nanocomposite metal-oxide catalysts for the compatible oxidative conversion of C1-4-alkanes and carbon dioxide with the production of hydrogen/synthesis gas, valuable organic compounds

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Модифікування метал-оксидних та метал-цеолітних каталізаторів сполуками Mg, Fe, Mo, Y, La, Ce. Дослідження впливу природи модифікуючих добавок сполук Mg, Fe, Mo, Y, La, Ce на структурно-розмірні характеристики, кислотно-основні та окисно-відновні властивості синтезованих метал-оксидних і метал-цеолітних каталізаторів.

Head

Soloviov Serhii О., Доктор хімічних наук

Registration Date

04-12-2024

Organization

L. V. Pisarzhevskii Institute Of Physical Chemistry of The National Academy of Sciences of Ukraine

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Creation by the purposeful design of efficient (highly active, stable in operation) catalysts based on metal-oxide compositions and zeolites of the structural type BEA for processes of (super)carbon dioxide/oxy-carbon dioxide conversion of methane/biogas and C3,4-alkanes, including with the involvement of cold plasma, for obtaining hydrogen, synthesis gas with an adjustable H2/СО ratio; oxidative dehydrogenation of C3,4-alkanes with the CO2 participation producing valuable olefins, dienes

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Project aims to solve issues of environmental safety and rational use of natural resources, to reduce anthropogenic influence of greenhouse gases on the environment by developing the fundamentals of natural-gas components' complex processing involving carbon dioxide by heterogeneous catalysis. Structural and functional design of the catalysts for light alkanes' processing such as methane, propane and butane to produce valuable intermediates and organic compounds: syngas (CO/H2), propylene and butenes of various structures by modifying catalysts with d, f, s and p-elements is the main objective of this stage. The introduction of Fe, La, Ce modifying additives is shown to decrease Lewis acidity of the surface of a Ni-Al2O3 catalyst for the dry reforming of methane. At the same time, Mg, La, and Mo compounds increase the catalyst's surface basicity. Reducing the acidity slows down an activation rate of the methane molecule with its subsequent dissociation. The latter, in the case of deep methane dissociation, leads to carburization of the catalyst's surface. Increasing the surface basicity, mainly at the expense of medium-strength basic sites, allows controlling the rate of methane dissociation, and also promotes adsorption and dissociation of the oxidant (CO2), which ensures a more stable catalysts' operation. Additions of Cen+ compounds form oxygen vacancies on the surface, which increases surface oxygen reactivity and catalyst's stability. A targeted construction (a design) of zeolite catalysts, the formation of active sites on the surface: acid-base ones by incorporating Ga(Zn, Cr) heteroelements; redox ones by incorporating d-metals into a crystal lattice of BEA allows developing effective catalysts for CO2-mediated oxidative dehydrogenation of propane and butane with the production of olefins. Higher process indices (at 600-650ºC): propane conversion of up to 55%, propylene selectivity of 96-99% and yield of up to 53% are achieved on Zn2.0SiBEA.

Product Description

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Vlasenko Nina V.
Didenko Olha Z.
Zikrata Oksana V.
Kurylets Yaroslava P.
Larina Olha V.
Nychyporuk Yurii M.
Orlyk Svitlana M.
Pertko Oleksandra P.
Chedryk Valerii I.

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2024-12-04