Direct conversion of methane to zeolite-templated carbons, light hydrocarbons, and hydrogen. (5th January 2023)

• Record Type: Journal Article
• Authors: Liu, Yujie; Osta, Elisabet Huertas; Poryvaev, Artem S.; Fedin, Matvey V.; Longo, Alessandro; Nefedov, Alexei; Kosinov, Nikolay
• Is Part Of: Carbon. Volume 201(2023)
• Page Start: 535
• Page End: 541
• Publication Date: 2023-01-05
• Subjects: Methane conversion -- Zeolite-templated carbons -- Light hydrocarbons -- Mo/ZSM-5 -- Zeolite topology; Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2022.09.050
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Efficient direct valorization of methane to value-added chemicals and materials remains an unsolved challenge for modern chemistry and materials science. In this work, we explored direct non-oxidative conversion of methane to hydrogen, hydrocarbons, and valuable zeolite-templated carbon materials. First, using a set of spectroscopy and microscopy characterization tools, we investigated how the reaction conditions influence the process of carbon formation inside the typical zeolite-based catalyst Mo/ZSM-5. Then, we explored the effect of the zeolite topology on the growth of carbon materials from methane decomposition over Mo/MFI, Mo/MOR, Mo/BEA, and Mo/FAU templates. Finally, we applied the obtained insights to prepare high-quality zeolite-templated carbons directly from methane using Fe/BEA and Fe/FAU templates. Altogether, our results represent a carbon-economic method of methane conversion to COx -free hydrogen gas, a mixture of light aliphatic and aromatic hydrocarbons, and valuable carbon materials. Graphical abstract: Carbon-economic valiorization of methane to hydrogen gas, a mixture of light aromatics and olefins, and valuable zeolite-templated carbons is demonstrated. We used spectroscopy and microscopy tools to understand the effects of transition metal catalytic function, zeolite topology, and reaction conditions on the formation of ordered carbon materials inside the zeolite pores. Image 1 Highlights: Conversion of CH4 to zeolite-templated carbons, hydrocarbons, and H2 was explored. Reaction temperature governs the formation of carbon materials inside the zeolite. Zeolite topology plays a key role in growth of carbon materials from CH4 conversion. High-quality zeolite-templated carbons obtained using Fe/BEA and Fe/FAU templates.