Synthesis of Ni2+-Modified Cerium Aluminate and Study of its Physicochemical and Catalytic Properties in the Dry Reforming of Methane Into Synthesis Gas Reaction | Sciact - CRIS-система Института катализа

Synthesis of Ni2+-Modified Cerium Aluminate and Study of its Physicochemical and Catalytic Properties in the Dry Reforming of Methane Into Synthesis Gas Reaction Научная публикация

Журнал

Journal of Structural Chemistry
ISSN: 0022-4766 , E-ISSN: 1573-8779

Вых. Данные

Год: 2025, Том: 66, Номер: 3, Страницы: 554-568 Страниц : 15 DOI: 10.1134/s0022476625030126

Ключевые слова

dry reforming of methane, greenhouse gas utilization, synthesis gas, H2, solution combustion synthesis, Ni2+-modified cerium aluminate, coking resistance.

Авторы

Shutilov A.A. ¹ , Marchuk A.S. ^1,2 , Zenkovets G.A. ¹

Организации

1	Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2	Novosibirsk State University, Novosibirsk, Russia

Информация о финансировании (1)

Российский научный фонд
Министерство науки и инновационной политики Новосибирской области

23-23-10054

NixCe1–xAlO3–δ catalysts (x = 0-0.5) are prepared by the solution combustion synthesis method. According to the powder XRD data, thermal treatment of the products at 700 °C in air leads mainly to the formation of the cerium aluminate phase and to small amounts of highly dispersed cerium dioxide phase. An increase in the nickel content in the sample significantly decreases the content of the cerium dioxide phase. The prepared Ni2+-modified cerium aluminate samples are precursors of catalysts for the dry reforming of methane reaction (DRM) and are characterized by high specific surface area and a developed porous structure. The study of the phase composition of these samples after their preliminary reduction (“activation”) in a hydrogen-containing gas mixture and subsequent performance in the reaction medium conditions shows that the Ni2+ ions are reduced, come out from the structure to the surface, and form metal Ni particles with a size of 5-8 nm. The influence of catalysts′ chemical composition on their properties in the DRM reaction is studied. The representative Ni0.5Ce0.5AlO3–δ catalyst shows stable performance in the DRM reaction for 30 h at T = 700 °C with a CH4 conversion of 77%, an H2 yield of 43%, and an extremely short contact time τ of 30 ms. High catalytic activity of the obtained catalysts in the DRM reaction is due to the formation of the active phase represented by highly-dispersed coking-resistant metal Ni nanoparticles on the inherently large specific surface area of the Ni2+-modified cerium aluminate.

Shutilov A.A. , Marchuk A.S. , Zenkovets G.A.
Synthesis of Ni2+-Modified Cerium Aluminate and Study of its Physicochemical and Catalytic Properties in the Dry Reforming of Methane Into Synthesis Gas Reaction
Journal of Structural Chemistry. 2025. V.66. N3. P.554-568. DOI: 10.1134/s0022476625030126 WOS Scopus CAPlus

Шутилов А.А. , Марчук А.С. , Зенковец Г.А.
Синтез алюмината церия, модифицированного ионами Ni2+, и исследование его физико-химических и каталитических свойств в реакции углекислотной конверсии метана в синтез-газ
Журнал структурной химии. 2025. Т.66. №3. 142125 . DOI: 10.26902/JSC_id142125 РИНЦ

Поступила в редакцию:	1 нояб. 2024 г.
Принята к публикации:	28 нояб. 2024 г.
Опубликована в печати:	28 мар. 2025 г.
Опубликована online:	28 мар. 2025 г.

Web of science:	WOS:001456015300015
Scopus:	2-s2.0-105001316558
Chemical Abstracts:	2025:791569

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