Dehydrogenation of n-Butane to Butadiene-1,3 on an Alumina-Chromium Catalyst. Part 1: Kinetics of Dehydrogenation and Reactions of Coke Formation Научная публикация
| Журнал |
Catalysis in Industry
ISSN: 2070-0504 , E-ISSN: 2070-0555 |
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| Вых. Данные | Год: 2024, Том: 16, Номер: 4, Страницы: 413–423 Страниц : 11 DOI: 10.1134/S2070050424700259 | ||
| Ключевые слова | kinetic model, n-butane, butadiene-1,3, dehydrogenation, hydrocracking, coke formation | ||
| Авторы |
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| Организации |
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Информация о финансировании (1)
| 1 | Министерство науки и высшего образования Российской Федерации (с 15 мая 2018) | FWUR-2024-0037 |
Реферат:
The kinetics of n-butane dehydrogenation to butadiene is studied with temperature (T) variation of 550–625°C, duration of dehydrogenation stage (t) of 5–30 min, and space velocity (V) of 4400–35200 h−1 on industrial catalyst K-CrOx/γ-Al2O3 at a fraction of 56–94 μm. The catalyst is stabilized before studies. The granulated catalyst in a reduction–dehydrogenation–regeneration cycle at 593°C, and then as a fraction of 56–94 μm in dehydrogenation–regeneration cycle at 650°C. The maximum selectivity toward butadiene of ~25 mol % is achieved with n-butane conversion of 26–30% (V = 35200 h−1), T = 600 °C, and t = 5 min, while the maximum yield of butadiene ~10 mol % is obtained with an increase in conversion up to ~50% (V = 8800 h–1) under the same conditions. Raising T to 625°C and t to 30 min and lowering V to ~4400 h–1 increases the selectivity toward byproducts to ~50 mol %. It is found that the energy of activation for the rates of product formation falls in the order by-products > butylene > butadiene. A kinetic model is proposed that describes the formation of butadiene via butylene, the formation of ethane/ethylene and methane/propylene by-products during butylene hydrocracking, and secondary conversions of by-products, plus the formation of coke and its effect on catalyst activity. In the model, the inhibition of dehydrogenation reactions by components of reaction mixture is described by a mechanism in which the limiting stage is a surface reaction on two active centers. The adequacy of the kinetic model is confirmed by good agreement between the calculated and experimental results
Библиографическая ссылка:
Ovchinnikova E.V.
, Petrov R.V.
, Chumachenko V.A.
, Noskov A.S.
Dehydrogenation of n-Butane to Butadiene-1,3 on an Alumina-Chromium Catalyst. Part 1: Kinetics of Dehydrogenation and Reactions of Coke Formation
Catalysis in Industry. 2024. V.16. N4. P.413–423. DOI: 10.1134/S2070050424700259 WOS Scopus РИНЦ
Dehydrogenation of n-Butane to Butadiene-1,3 on an Alumina-Chromium Catalyst. Part 1: Kinetics of Dehydrogenation and Reactions of Coke Formation
Catalysis in Industry. 2024. V.16. N4. P.413–423. DOI: 10.1134/S2070050424700259 WOS Scopus РИНЦ
Оригинальная:
Овчинникова Е.В.
, Петров Р.В.
, Чумаченко В.А.
, Носков А.С.
Дегидрирование н-бутана в бутадиеН-1,3 на алюмохромовом катализаторе: 1. Кинетика реакций дегидрирования и коксообразования
Катализ в промышленности. 2024. Т.24. №3. С.16-28. DOI: 10.18412/1816-0387-2024-3-16-28 РИНЦ CAPlus OpenAlex
Дегидрирование н-бутана в бутадиеН-1,3 на алюмохромовом катализаторе: 1. Кинетика реакций дегидрирования и коксообразования
Катализ в промышленности. 2024. Т.24. №3. С.16-28. DOI: 10.18412/1816-0387-2024-3-16-28 РИНЦ CAPlus OpenAlex
Даты:
| Поступила в редакцию: | 5 окт. 2023 г. |
| Принята к публикации: | 13 дек. 2023 г. |
| Опубликована в печати: | 1 дек. 2024 г. |
| Опубликована online: | 27 янв. 2025 г. |
Идентификаторы БД:
| Web of science: | WOS:001408605200011 |
| Scopus: | 2-s2.0-85217661731 |
| РИНЦ: | 80240199 |
Цитирование в БД:
Пока нет цитирований