|
ИСТИНА |
Войти в систему Регистрация |
Интеллектуальная Система Тематического Исследования НАукометрических данных |
||
SYNTHESIS OF CARBON NANOTUBES BY CHEMICAL VAPOR DEPOSITION OF CH4/H2 MIXTURES: EXPERIMENTAL STUDY AND COMPUTER MODELINGстатья
Информация о цитировании статьи получена из
Scopus
Дата последнего поиска статьи во внешних источниках: 17 августа 2021 г.
- Авторы: Skichko E., Koltsova E., Shaneva A.
- Сборник: 20th International Multidisciplinary Scientific GeoConference SGEM 2020
- Серия: International Multidisciplinary Scientific GeoConference-SGEM
- Том: 20
- Год издания: 2020
- Издательство: Hikari Ltd.
- Местоположение издательства: Bulgaria
- Первая страница: 133
- Последняя страница: 140
- DOI: 10.5593/sgem2020/6.1/s24.018
- Аннотация: The aim of this work is to experimentally study the synthesis of carbon nanotubes and nanofibers by catalytic pyrolysis of methane-hydrogen mixtures, as well as to develope a kinetic scheme that takes into account the accelerating and suppressing effect of hydrogen on pyrolysis. Carbon nanotubes were synthesized in a laboratory kinetic setup with a vertical quartz reactor at a temperature of 700?. The oxide system (Fe0.45Co0.15Al0.40)2O3 obtained by combustion method was taken as a catalyst. The hydrogen concentration in the initial gas mixture was 0, 20, 40, and 60% vol. Electron microscopy of the obtained carbon material was performed on a LEO 912AB Omega transmission electron microscope at an accelerating voltage of 100 kV. As a result of synthesis, carbon nanotubes were obtained with a small admixture of bamboo-type carbon nanofibers with an outer diameter of 10-20 nm. At a hydrogen concentration of 40%, the maximum carbon yield is reached, which is approximately 3 times higher than with the pyrolysis of undiluted methane. A kinetic scheme of pyrolysis was developed, which made it possible to describe the accelerating and suppressing effect of hydrogen and provide a good agreement between the experimental and calculated data.
- Добавил в систему: Шанева Анна Сергеевна