Catalytic direct oxidation of methane to methanol by redox of copper mordenite

Autor:	Shun Nishimura, Itsuki Miyazato, Keisuke Takahashi, Kazuo Kato, Masato Machida, Yuka Tsuchimura, Airi Hirayama, Hiroshi Yoshida, Junya Ohyama, Nahoko Kondou
Rok vydání:	2021
Předmět:	chemistry.chemical_compound Catalytic cycle chemistry Inorganic chemistry chemistry.chemical_element Methanol Zeolite Redox Copper Catalysis Mordenite Turnover number
Zdroj:	Catalysis Science & Technology. 11:3437-3446
ISSN:	2044-4761 2044-4753
Popis:	Expectations for industrial implementation of direct conversion of CH4 to CH3OH are growing with the increasing demand for energy-efficient chemical processes. In this study, catalytic production of CH3OH by direct oxidation of CH4 with O2 was performed using Cu zeolite catalysts in a CH4/O2/H2O flow reaction. Among the various Cu zeolites investigated, the Cu-MOR catalyst exhibited relatively high CH3OH production with a turnover number of 7.4 molCH3OH molCu−1 over 24 h (CH4 conversion: 0.011%). The catalytically active Cu species and catalytic cycle were investigated by in situ simultaneous X-ray absorption and infrared spectroscopy. The results suggest that the key to the catalytic cycle over Cu-MOR is the redox of Cu(I)/Cu(II) species. Furthermore, H2O-adsorption-included dynamic Cu species are revealed to be catalytically active.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::86a72bf7a31ea6d4e2d7b8340c4d7df9 https://doi.org/10.1039/d1cy00125f Zobrazit plný text záznamu