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Information × Registration Number 0224U000165, 0121U100515 , R & D reports Title Improving the efficiency of heterogeneous catalytic systems based on zeolites and development of new microheterogeneous systems based on microemulsions popup.stage_title Head Patryliak Liubov K., Доктор хімічних наук Registration Date 03-01-2024 Organization V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the National Academy of Sciences of Ukraine popup.description2 Zeolite-containing microspheres based on domestic kaolin modified with NH4, La, and Zr were synthesized. The samples were studied by several physicochemical methods and tested in cracking and dehydrogenation reactions. The stabilizing effect of Zr on the porous structure of the catalysts' zeolite phase was revealed, which is explained by isomorphic replacement of the framework Al for Zr with an increase in the Si/Al ratio. It was found that modification by transition metals contributes to an increase in thermal stability of pure hydrogen form after steaming by 25 °C. After thermal steam treatment, the sample with 6.5 % Zr showed the best conversion in cumene cracking, which exceeds by 1.7−2 times the conversion on the sample without additives of metals. This catalyst also was the most effective in suppressing the growth of selectivity for coke precursors after steaming of n-hexane cracking catalysts. An increase in selectivity of microspherical La- and Zr-contained catalysts for 1,3-BD in the oxidative dehydrogenation of butane by CO2 after steaming was shown. The influence of synthesized fatty acid alkylolamides from oil and fatty waste on the formation of an ultradispersed carbonate core of thixotropic systems by the exchange reaction and carbonation method was investigated. Nanodispersed calcium carbonate of ellipsoidal and cubic crystallite forms with an average size from 7−15 nm to 44 nm of vaterite and calcite polymorphic modification was obtained by intermicellular interaction of two thermodynamically stable microemulsions. The carbonation method was used to obtain ultradispersed carbonate nuclei of thixotropic systems of spherical and cubic forms with an average size of 6−15 nm for vaterites and 33−54 nm for calcites. The crystallite size and polymorphic modification were confirmed by X-ray diffraction analysis. Scanning electron microscopy confirmed the morphology of ultrafine calcium carbonate (ellipsoidal, cubic, spherical) and their agglomeration. Product Description popup.authors Bodachivska Larisa Yu. Voloshyna Yuliya G. Davitadze David Z. Zlochevskyi Kostiantyn V. Zubenko Stepan O. Коnovalov Serhiy V. Melnychuk Oleksandr V. Nizhnik Borys O. Papeikin Oleksii O. Pertko Oleksandra P. Povazhnyi Volodymyr А. Yakovenko Angela V. popup.nrat_date 2024-01-03 Close