Synthesis of CexZr1‐xO2/SiO2 supports for chromium oxide catalysts of oxidative dehydrogenation of propane with carbon dioxide

Synthesis of CexZr1‐xO2/SiO2 supports for chromium oxide catalysts of oxidative dehydrogenation of propane with carbon dioxide Научная публикация

Журнал

Journal of Chemical Technology & Biotechnology
ISSN: 1097-4660 , E-ISSN: 0268-2575

Вых. Данные

Год: 2023, Том: 98, Номер: 5, Страницы: 1247-1259 Страниц : 13 DOI: 10.1002/jctb.7339

Авторы

Mashkin Mikhail Yu. ^1,2 , Tedeeva Marina A. ^1,2 , Fedorova Anna A. ¹ , Fatula Evgeniya R. ¹ , Egorov Alexander V. ¹ , Dvoryak Stanislav V. ¹ , Maslakov Konstantin I. ¹ , Knotko Alexander V. ¹ , Baranchikov Alexander E. ³ , Kapustin Gennadii I. ² , Petukhov Dmitrii I. ¹ , Shatalova Tatyana B. ¹ , Morozov Igor V. ¹ , Kustov Leonid M. ^1,4,2 , Kustov Alexander L. ^1,4,2

Организации

1	Chemistry Department, Lomonosov Moscow State University, Moscow, 119991 Russia
2	Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Moscow, 119991 Russia
3	Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Moscow, 119071 Russia
4	National University of Science and Technology “MISiS” Moscow 119049 Russia

BACKGROUND Propane dehydrogenation is an alternative way both to produce propylene and to utilize CO2. Because of the high oxygen mobility in cerium-zirconium oxide (CexZr1-xO2), it looks promising as a support for the chromium oxide catalysts of propane dehydrogenation with CO2. Supports of CexZr1-xO2 on mesoporous silica were synthesized in this work to combine the high oxygen mobility of the former and the pore structure of the latter. RESULTS Two applied synthetic approaches resulted in materials with different structure and properties. The wet impregnated catalysts demonstrated a higher activity and selectivity to propylene. At the same time, they had larger pore size distribution maxima (~9 nm) than the samples prepared by the introduction of metals simultaneously with Si-precursor hydrolysis (~2 nm). For the chromium catalysts with the same support, the catalytic activity decreased with varying chromium loading as follows: 5% Cr > 3% Cr ≈ 7% Cr. For the catalysts with different CexZr1-xO2 supports and equal chromium loading, the activity decreased with x changing as follows: 0.5 > 0.6 > 0.8 for the samples prepared by wet impregnation, and 0.8 ≈ 0.6 > 0.5 for the other synthetic path. CONCLUSIONS Catalysts were tested in oxidative dehydrogenation of propane with CO2. The wet impregnation approach turned out to be much more promising in terms of catalytic activity and selectivity to propylene in the reaction of propane dehydrogenation with CO2. The selectivity achieved was ≤80% at a 40% conversion. © 2023 Society of Chemical Industry (SCI).

Mashkin M.Y. , Tedeeva M.A. , Fedorova A.A. , Fatula E.R. , Egorov A.V. , Dvoryak S.V. , Maslakov K.I. , Knotko A.V. , Baranchikov A.E. , Kapustin G.I. , Petukhov D.I. , Shatalova T.B. , Morozov I.V. , Kustov L.M. , Kustov A.L.
Synthesis of CexZr1‐xO2/SiO2 supports for chromium oxide catalysts of oxidative dehydrogenation of propane with carbon dioxide
Journal of Chemical Technology & Biotechnology. 2023. V.98. N5. P.1247-1259. DOI: 10.1002/jctb.7339 WOS Scopus OpenAlex

Web of science:	WOS:000937001800001
Scopus:	2-s2.0-85149206934
OpenAlex:	W4319789051

БД	Цитирований
OpenAlex	19
Scopus	18
Web of science	15