Hydroprocessing of Maya Vacuum Residue Using a NiMo Catalyst Supported on Cr-Doped Alumina Научная публикация
| Журнал |
Fuel
ISSN: 0016-2361 , E-ISSN: 1873-7153 |
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| Вых. Данные | Год: 2020, Том: 263, Номер статьи : 116717, Страниц : 9 DOI: 10.1016/j.fuel.2019.116717 | ||||||
| Ключевые слова | Asphaltene; Cr-doped alumina; Hydrocracking; Hydroprocessing; NiMo catalyst; Vacuum residue | ||||||
| Авторы |
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| Организации |
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Информация о финансировании (2)
| 1 |
Фонд «Сколково» BP Chemicals Limited, Research Laboratory |
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| 2 | National Council of Science and Technology |
Реферат:
Mesoporous alumina was doped with Cr using a co-precipitation method to prepare a support for hydrocracking catalysts. Ni and Mo were then impregnated on Cr-doped mesoporous alumina (NiMo/Al2O3-Cr). Catalytic activity was tested in hydrodeasphaltenisation (HDA), hydrodesulfurisation (HDS) and hydrodemetallisation (HDM) of Maya vacuum residue in a batch reactor and compared with NiMo supported on mesoporous alumina not doped with Cr (NiMo/Al2O3). Following activation and initial carbon deposition, experiments involving contact of the catalysts with fresh feed were performed. Greater HDA extent and maltene to asphaltene ratios were obtained with NiMo/Al2O3-Cr than NiMo/Al2O3 despite a larger amount of coke deposits. Significant activity of both NiMo/Al2O3-Cr and NiMo/Al2O3 towards HDS and HDM were also observed. Alumina textural properties remained relatively unaffected by the co-precipitation of Cr. X-ray photoelectron spectroscopy (XPS) showed that the catalysts contained Cr3+ and after reduction all Ni was present in metallic state at least in the near-surface region, while Mo6+ was reduced to Mo4+ and Moδ+ (0 ≤ δ ≤ 3) to a larger extent in NiMo/Al2O3-Cr. Lower reduction temperatures in the presence of Cr were determined, suggesting a larger number of metal sites available in reduced form at operating conditions. It was found that Cr aided metal dispersion in catalyst synthesis and coke dispersion during reaction. Spent catalysts showed reductions in surface area and pore volume. However, while spent NiMo/Al2O3 catalysts had a decrease in average pore diameter (APD), NiMo/Al2O3-Cr maintained the fresh material APD, which may explain the sustained catalytic activity. © 2019 Elsevier Ltd
Библиографическая ссылка:
Puron H.
, Pinilla J.L.
, Saraev A.A.
, Kaichev V.V.
, Millan M.
Hydroprocessing of Maya Vacuum Residue Using a NiMo Catalyst Supported on Cr-Doped Alumina
Fuel. 2020. V.263. 116717 :1-9. DOI: 10.1016/j.fuel.2019.116717 WOS Scopus РИНЦ CAPlus OpenAlex
Hydroprocessing of Maya Vacuum Residue Using a NiMo Catalyst Supported on Cr-Doped Alumina
Fuel. 2020. V.263. 116717 :1-9. DOI: 10.1016/j.fuel.2019.116717 WOS Scopus РИНЦ CAPlus OpenAlex
Даты:
| Поступила в редакцию: | 24 сент. 2019 г. |
| Принята к публикации: | 20 нояб. 2019 г. |
| Опубликована online: | 4 дек. 2019 г. |
| Опубликована в печати: | 1 мар. 2020 г. |
Идентификаторы БД:
| Web of science: | WOS:000504834400061 |
| Scopus: | 2-s2.0-85076613946 |
| РИНЦ: | 43219313 |
| Chemical Abstracts: | 2019:2310177 |
| OpenAlex: | W2992312506 |