Ni–Cu High-Loaded Sol–Gel Catalysts for Dehydrogenation of Liquid Organic Hydrides: Insights into Structural Features and Relationship with Catalytic Activity
| Autor: | Andrey A. Saraev, Maria V. Alekseeva (Bykova), Anna M. Kremneva, Olga A. Bulavchenko, Evgeny Yu. Gerasimov, S. A. Selishcheva, Vasily V. Kaichev, Yuliya K. Gulyaeva, Vadim A. Yakovlev |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Hydrogen General Chemical Engineering chemistry.chemical_element Toluene Article Catalysis chemistry.chemical_compound Chemistry LOHC chemistry Chemical engineering dehydrogenation nickel–copper catalyst General Materials Science Atomic ratio Dehydrogenation solid solution Methylcyclohexane Selectivity QD1-999 Sol-gel |
| Zdroj: | Nanomaterials, Vol 11, Iss 2017, p 2017 (2021) Nanomaterials Volume 11 Issue 8 |
| ISSN: | 2079-4991 |
| Popis: | The heightened interest in liquid organic hydrogen carriers encourages the development of catalysts suitable for multicycle use. To ensure high catalytic activity and selectivity, the structure–reactivity relationship must be extensively investigated. In this study, high-loaded Ni–Cu catalysts were considered for the dehydrogenation of methylcyclohexane. The highest conversion of 85% and toluene selectivity of 70% were achieved at 325 °C in a fixed-bed reactor using a catalyst with a Cu/Ni atomic ratio of 0.23. To shed light on the relationship between the structural features and catalytic performance, the catalysts were thoroughly studied using a wide range of advanced physicochemical tools. The activity and selectivity of the proposed catalysts are related to the uniformity of Cu distribution and its interaction with Ni via the formation of metallic solid solutions. The method of introduction of copper in the catalyst plays a crucial role in the effectiveness of the interaction between the two metals. |
| Databáze: | OpenAIRE |
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