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Effect of Cu on Performance of Self-Dispersing Ni-Catalyst in Production of Carbon Nanofibers from Ethylene Научная публикация

Журнал C-Journal of Carbon Research
ISSN: 2311-5629
Вых. Данные Год: 2023, Том: 9, Номер: 3, Номер статьи : 77, Страниц : 17 DOI: 10.3390/c9030077
Ключевые слова nickel-copper alloys; carbon erosion; catalytic pyrolysis; carbon nanofibers; segmented structure
Авторы Afonnikova Sofya D. 1 , Bauman Yury I. 1 , Stoyanovskii Vladimir O. 1 , Volochaev Mikhail N. 2 , Mishakov Ilya V. 1 , Vedyagin Aleksey A. 1
Организации
1 Boreskov Institute of Catalysis SB RAS, 5 Lavrentyev Ave., Novosibirsk 630090, Russia
2 Kirensky Institute of Physics, Akademgorodok, 50/38, Krasnoyarsk 660036, Russia

Информация о финансировании (2)

1 Министерство науки и высшего образования Российской Федерации (с 15 мая 2018) 0239-2021-0010
2 Российский научный фонд 22-13-00406

Реферат: The development of effective catalysts for the pyrolysis of light hydrocarbons with the production of carbon nanomaterials represents a relevant direction. In the present work, the influence of copper addition on performance of a self-dispersed Ni-catalyst and structural features of the obtained carbon nanofibers (CNFs) was studied. The precursors of Ni and Ni-Cu catalysts were prepared by activation of metal powders in a planetary mill. During contact with the C2H4/H2 reaction mixture, a rapid disintegration of the catalysts with the formation of active particles catalyzing the growth of CNFs has occurred. The kinetics of CNF accumulation during ethylene decomposition on Ni- and Ni-Cu catalysts was studied. The effect of temperature on catalytic performance was explored and it was shown that introduction of copper promotes 1.5–2-fold increase in CNFs yield in the range of 525–600 °C; the maximum CNFs yield (100 g/gcat and above, for 30-min reaction) is reached on Ni-Cu-catalyst at 575–600 °C. A comparative analysis of the morphology and structure of CNF was carried out using electron microscopy methods. The growth mechanism of carbon filaments in the shape of “railway crossties” on large nickel crystals (d > 250 nm) was proposed. It was found that the addition of copper leads to a decrease in the bulk density of the carbon product from 40–60 to 25–30 g/L (at T = 550–600 °C). According to the low-temperature nitrogen adsorption data, specific surface area (SSA) of CNF samples (at T < 600 °C) lies in the range of 110–140 m2/g, regardless of the catalyst composition; at T = 600 °C the introduction of copper contributed to an increase in the specific surface of CNF by 100 m2/g.
Библиографическая ссылка: Afonnikova S.D. , Bauman Y.I. , Stoyanovskii V.O. , Volochaev M.N. , Mishakov I.V. , Vedyagin A.A.
Effect of Cu on Performance of Self-Dispersing Ni-Catalyst in Production of Carbon Nanofibers from Ethylene
C-Journal of Carbon Research. 2023. V.9. N3. 77 :1-17. DOI: 10.3390/c9030077 WOS Scopus РИНЦ CAPlus OpenAlex
Даты:
Поступила в редакцию: 6 июл. 2023 г.
Принята к публикации: 9 авг. 2023 г.
Опубликована online: 14 авг. 2023 г.
Опубликована в печати: 1 сент. 2023 г.
Идентификаторы БД:
Web of science: WOS:001073434600001
Scopus: 2-s2.0-85172768194
РИНЦ: 54919920
Chemical Abstracts: 2023:2053588
OpenAlex: W4385812411
Цитирование в БД:
БД Цитирований
OpenAlex 10
Scopus 10
Web of science 9
РИНЦ 6
Альметрики: