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Formulation of two monofunctional catalysts for CH4 upgradingстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Konnov Stanislav V., Medeiros-Costa Izabel C., Cruchade Hugo, Dubray Florent, Debost Maxime, Gilson Jean-Pierre, Valtchev Valentin, Dath Jean-Pierre, Nesterenko Nikolai, Mintova Svetlana
- Журнал: Applied Catalysis A: General
- Том: 644
- Год издания: 2022
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 118814
- DOI: 10.1016/j.apcata.2022.118814
- Аннотация: Natural gas will play a significant role in the transition from fossil to green(er) energy production. Its major component, methane (CH4) is an attractive resource to co-generate hydrogen (H2) and added value chemicals (important building blocks such as olefins and aromatics) for petrochemistry. We highlight the advantage of using a novel dual catalyst system containing a monofunctional Al-free metallic single site catalyst referred as S-Mo (Si/Al ∼ ∝) where Mo is atomically dispersed in the zeolitic framework and a monofunctional acidic H-ZSM-5 catalyst referred as S-Al (SiAl = 128) to achieve superior yields of high value products. Under severe reaction (850 ºC) and regeneration (700 ºC) conditions, the Mo-S catalyst is stable and does not suffer from irreversible structural damage by losing its Mo atomic dispersion, and deactivation by coke deposition, thus ensuring steady catalytic performances in multi-cycle catalytic tests. Conversely, the current bifunctional catalysts prepared by Mo impregnation on an acidic catalyst suffer from irreversible damage during coke combustion due to the formation of Al₂(MoO₄)₃ or AlMoO6 Anderson entities. This new approach opens novel and promising pathways to develop methane upgrading processes based on the physical separation and operation of a non-deactivating metallic catalyst and a regenerable acidic catalyst.
- Добавил в систему: Коннов Станислав Владиславович