Details

Autor(en) / Beteiligte

• OHYAMA, Junya
• HIRAYAMA, Airi
• YOSHIDA, Hiroshi
• MACHIDA, Masato
• KATO, Kazuo
• NISHIMURA, Shun
• TAKAHASHI, Keisuke

Titel

Relationship between Redox Rate and Catalytic Activity of Cu Zeolite in the Partial Oxidation of Methane

Ist Teil von

• Journal of the Japan Petroleum Institute, 2023/09/01, Vol.66(5), pp.180-184

Ort / Verlag

Tokyo: The Japan Petroleum Institute

Erscheinungsjahr

2023

Link zum Volltext

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• Cu zeolites have been developed as catalysts for partial oxidation of CH4. Our previous study evaluated the redox behaviors of Cu-CHA and Cu-MOR zeolites, which have relatively high performance for CH4 partial oxidation among various Cu zeolites, using Cu K-edge X-ray absorption fine structure (XAFS) spectroscopy. In the present study, a Cu-MFI zeolite with high CO2 selectivity, i.e., a not good catalyst for CH4 partial oxidation was analyzed using in situ XAFS spectroscopy. Data for Cu-MFI were combined with the previous data for Cu-MOR and Cu-CHA to investigate the relationship between the Cu2+/+ redox rates and the catalytic characteristics. The reduction rate of Cu2+ to Cu+ was strongly correlated with the CH4 oxidation activity because the C–H activation of CH4 involves the reduction of Cu2+. However, the Cu2+/+ redox rates showed no clear relationship with the selectivity.