Layered Double Hydroxide-Derived Ni-Mg-Al Catalysts for Ammonia Decomposition Process: Synthesis and Characterization | Sciact - CRIS-система Института катализа

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

Журнал

Catalysts
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 (2)

1	Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)	0239-2021-0011
2	Российский научный фонд	21-79-30051 (121052600153-6)

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.

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 CAPlus OpenAlex ЦНХТ ID

Поступила в редакцию:	15 февр. 2023 г.
Принята к публикации:	27 мар. 2023 г.
Опубликована online:	30 мар. 2023 г.
Опубликована в печати:	1 апр. 2023 г.

Web of science:	WOS:000977656900001
Scopus:	2-s2.0-85153962527
РИНЦ:	53958878
Chemical Abstracts:	2023:935675
OpenAlex:	W4362468819
ЦНХТ ID:	4165

БД	Цитирований
Scopus	6
Web of science	6
РИНЦ	2
OpenAlex	7