δ-Alumina Supported Cobalt Catalysts Promoted by Ruthenium for Fischer-Tropsch Synthesis Научная публикация
| Журнал |
Applied Catalysis A: General
ISSN: 0926-860X , E-ISSN: 1873-3875 |
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| Вых. Данные | Год: 2017, Том: 539, Страницы: 48-58 Страниц : 11 DOI: 10.1016/j.apcata.2017.04.003 | ||||||||
| Ключевые слова | Cobalt-alumina catalysts, Cobalt-ruthenium alloy, Fischer-Tropsch synthesis, Promotion, Ruthenium | ||||||||
| Авторы |
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| Организации |
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Информация о финансировании (1)
| 1 | Федеральное агентство научных организаций России | 0303-2016-0013 |
Реферат:
The paper presents the low-temperature nitrogen adsorption, TG, XRD, IR spectroscopy, XPS, TEM and SEM data for ruthenium promoted (0.2–1 wt.%) Сo-δAl2O3 catalysts and characteristics of the catalysts in Fischer-Tropsch synthesis after their activation under the conditions ensuring the reduction of comparable fractions of metallic cobalt. It was shown that cobalt in oxide precursors is a component of the spinel-like Со3-xAlxO4 phase containing the impurity anions СО32−, NO3−, ОН−, and NO in promoted samples, which belong to the thermolysis product of the Ru precursor. Average sizes of Со3-xAlxO4 crystallites are in a range of 5–10 nm. As ruthenium content in the catalyst increases upon reduction, the temperature of metallic phase formation decreases substantially (by more than 150 °C). After the reduction, selectivity of promoted catalysts for α-olefins and high-molecular hydrocarbons was higher in comparison with unpromoted catalysts, without a noticeable decrease in catalytic activity. Therewith, in 0.5-1.0 wt.% catalysts, a part of ruthenium forms individual ultradispersed metallic particles ca. 1 nm in size that are located on the surface of oxide support and are not active in Fischer-Tropsch synthesis. The oxide layer decorating the surface of metallic cobalt particles is also strongly enriched with ruthenium. In the 0.2 wt.% catalyst, the major part of ruthenium resides in metallic cobalt particles. Although the ruthenium-cobalt alloy segregates with enrichment of the surface with cobalt, the presence of ruthenium in the metallic particles and probably in the decorating oxide layer exerts a considerable effect on selectivity of the catalysts.
Библиографическая ссылка:
Kungurova O.A.
, Khassin A.A.
, Cherepanova S.V.
, Saraev A.A.
, Kaichev V.V.
, Shtertser N.V.
, Chermashentseva G.K.
, Gerasimov Е.Y.
, Paukshtis Е.A.
, Vodyankina О.V.
, Minyukova T.P.
, Abou-Jaoudé G.
δ-Alumina Supported Cobalt Catalysts Promoted by Ruthenium for Fischer-Tropsch Synthesis
Applied Catalysis A: General. 2017. V.539. P.48-58. DOI: 10.1016/j.apcata.2017.04.003 WOS Scopus РИНЦ CAPlusCA OpenAlex
δ-Alumina Supported Cobalt Catalysts Promoted by Ruthenium for Fischer-Tropsch Synthesis
Applied Catalysis A: General. 2017. V.539. P.48-58. DOI: 10.1016/j.apcata.2017.04.003 WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
| Поступила в редакцию: | 16 янв. 2017 г. |
| Принята к публикации: | 4 апр. 2017 г. |
| Опубликована online: | 6 апр. 2017 г. |
| Опубликована в печати: | 1 июн. 2017 г. |
Идентификаторы БД:
| Web of science: | WOS:000402214900006 |
| Scopus: | 2-s2.0-85017446133 |
| РИНЦ: | 29484102 |
| Chemical Abstracts: | 2017:779818 |
| Chemical Abstracts (print): | 167:58610 |
| OpenAlex: | W2604733252 |