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Layered Double Hydroxide-Derived Ni-Mg-Al Catalysts for Ammonia Decomposition Process: Synthesis and Characterization Научная публикация

Журнал Catalysts
, E-ISSN: 2073-4344
Вых. Данные Год: 2023, Том: 13, Номер: 4, Номер статьи : 678, Страниц : 14 DOI: 10.3390/catal13040678
Ключевые слова nickel catalysts; hydrotalcite-derived catalysts; Ni-Mg-Al-double layered hydroxides Ni-Mg-Al mixed oxide; ammonia decomposition; H2 production
Авторы Fedorova Zaliya A. 1,2 , Borisov Vadim A. 3,4 , Pakharukova Vera P. 2 , Gerasimov Evgeniy Y. 2 , Belyaev Vladimir D. 1,2 , Gulyaeva Tatyana I. 3 , Shlyapin Dmitriy A. 3 , Snytnikov Pavel V. 2
Организации
1 Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630128, Russia
2 Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, Novosibirsk 630090, Russia
3 Center of New Chemical Technologies BIC, Boreskov Institute of Catalysis SB RAS, Neftezavodskaya St. 54, Omsk 644040, Russia
4 Petrochemical Institute, Omsk State Technical University, Prospect Mira 11, Omsk 644050, Russia

Информация о финансировании (1)

1 Министерство науки и высшего образования Российской Федерации 0239-2021-0011

Реферат: Layered Ni-Mg-Al hydroxides with (Ni + Mg)/Al = 2.5 differing in Mg/Ni ratios and related oxide systems have been synthesized and characterized. Ni-Mg-Al hydroxides were prepared by the coprecipitation method. It was found that the samples dried at 110 °C were layered Ni-Mg-Al hydroxides with a hydrotalcite-type structure. After the heat treatment at 600 °C, the formation of Ni-Mg-Al-mixed oxides with a specific nanostructure, an intermediate between a NaCl and spinel structure, took place. According to XRD data, it had the unit cell parameter a = 4.174–4.181 Å, and a crystallite size of 4.0 nm. The specific surface area of the Ni-Mg-Al samples dried at 110 °C was 45–54 m2/g, and that of those calcined at 600 °C was 156.1–209.1 m2/g. In agreement with HRTEM data, in all the synthesized nickel catalysts reduced at 700 °C (H2), particle size was mainly distributed between 15–20 nm. The catalyst activity of LDH-derived Ni-Mg-Al catalysts in ammonia decomposition was studied in a fixed-bed flow-type reactor at an atmospheric pressure within the temperature range 500–700 °C. The synthesized catalysts overcame existing analogues in catalytic performance. At a process temperature of 500 °C, the Ni2Mg3Al2-HT catalyst showed that the H2 productivity was 23.8 mmol/(gcat·min), exceeding the respective value of nickel catalysts reported in the literature.
Библиографическая ссылка: Fedorova Z.A. , Borisov V.A. , Pakharukova V.P. , Gerasimov E.Y. , Belyaev V.D. , Gulyaeva T.I. , Shlyapin D.A. , Snytnikov P.V.
Layered Double Hydroxide-Derived Ni-Mg-Al Catalysts for Ammonia Decomposition Process: Synthesis and Characterization
Catalysts. 2023. V.13. N4. 678 :1-14. DOI: 10.3390/catal13040678 WOS Scopus РИНЦ OpenAlex
Даты:
Поступила в редакцию: 15 февр. 2023 г.
Принята к публикации: 27 мар. 2023 г.
Опубликована в печати: 30 мар. 2023 г.
Опубликована online: 30 мар. 2023 г.
Идентификаторы БД:
Web of science: WOS:000977656900001
Scopus: 2-s2.0-85153962527
РИНЦ: 53958878
OpenAlex: W4362468819
Цитирование в БД:
БД Цитирований
Web of science 1
OpenAlex 3
Scopus 2
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