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The Effect of Substituting La and Co with Ca and Ti in LaCoO3/KIT-6 on Its Properties and Possible Catalytic Application in Syngas Conversion Научная публикация

Журнал Materials Chemistry and Physics
ISSN: 0254-0584 , E-ISSN: 1879-3312
Вых. Данные Год: 2022, Том: 276, Номер статьи : 125387, Страниц : 9 DOI: 10.1016/j.matchemphys.2021.125387
Ключевые слова cobalt-titanium perovskites; KIT-6 support synthesis; syngas conversion.
Авторы Dokuchits Eugene V. 1 , Larina Tatyana V. 1 , Ishchenko Arkady V. 1 , Minyukova Tatyana P. 1
Организации
1 Boreskov Institute of Catalysis SB RAS, Pr. Akad. Lavrentieva 5, Novosibirsk, 630090, Russia

Информация о финансировании (1)

1 Министерство науки и высшего образования Российской Федерации (с 15 мая 2018) 0239-2021-0010

Реферат: Perovskite-type samples La1-xCaxCo1-xTixO3/KIT-6 (x = 0 0.5) were synthesized by citrate method. KIT-6 is partially embedded in the perovskite structure. The complete reduction of cobalt in perovskites in the presence of KIT-6 occurs at a temperature of ca. 670°C due to the formation of a cobalt silicate phase. With the substitution of titanium for cobalt cations, the complete reduction of cobalt occurs at temperatures above 720°C. The proportion of cobalt that is reduced at temperatures below 500°C increases with an increase in the ratio of Co3+/Co2+ cations. Partial substitution of cobalt cations with titanium cations decreases the selectivity ratios SCH3OH/SC2+OH and SCH4/SC2-8. The introduction of calcium cations leads, proportionally to its content, to a strong decrease in selectivity to methanol and an increase in selectivity for light hydrocarbons C2-8 in syngas conversion. It was shown that the maximum selectivity for higher alcohols with a low selectivity for methanol is observed at x = 0.3 on a sample containing calcium. A significant amount of the cobalt carbide phase Co2C in the used KIT-6-free sample of LaCoO3 is accompanied by the predominance of the methanation reaction (CH4 selectivity 58.7%). The synthesized samples on KIT-6 have higher selectivity to alcohols compared to a conventional CoAl oxide catalyst and somewhat lower activity in syngas conversion.
Библиографическая ссылка: Dokuchits E.V. , Larina T.V. , Ishchenko A.V. , Minyukova T.P.
The Effect of Substituting La and Co with Ca and Ti in LaCoO3/KIT-6 on Its Properties and Possible Catalytic Application in Syngas Conversion
Materials Chemistry and Physics. 2022. V.276. 125387 :1-9. DOI: 10.1016/j.matchemphys.2021.125387 WOS Scopus РИНЦ CAPlus OpenAlex
Даты:
Поступила в редакцию: 8 июл. 2021 г.
Принята к публикации: 26 окт. 2021 г.
Опубликована online: 29 окт. 2021 г.
Опубликована в печати: 15 янв. 2022 г.
Идентификаторы БД:
Web of science: WOS:000715750700005
Scopus: 2-s2.0-85118330858
РИНЦ: 47521484
Chemical Abstracts: 2021:2404422
OpenAlex: W3210206298
Цитирование в БД:
БД Цитирований
Scopus 3
Web of science 3
РИНЦ 1
OpenAlex 2
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