Methane Combustion over Pd Catalysts Loaded on Medium and Large Pore Zeolites
SCIE
SCOPUS
- Title
- Methane Combustion over Pd Catalysts Loaded on Medium and Large Pore Zeolites
- Authors
- Park, JH; Kim, B; Shin, CH; Seo, G; Kim, SH; Hong, SB
- Date Issued
- 2009-03
- Publisher
- SPRINGER/PLENUM PUBLISHERS
- Abstract
- Methane combustion was conducted over Pd catalysts supported on medium (ZSM-5, ferrierite, TNU-9, TNU-10) and large (USY, mordenite, beta) pore zeolites. Among the catalysts studied here, Pd/H-TNU-10 exhibited the highest combustion activity, together with excellent durability in the presence of water vapor. A combination of TEM and Pd K-edge XAFS measurements reveals the formation of highly dispersed PdO particles within the TNU-10 pores. This is also the case of Pd/H-ferrierite, while frequently there are large particles (60-100 A...) on its outer surface. In contrast, most of PdO on zeolites other than these two medium pore materials were found to exist as aggregated particles (> 50 A...) on their outer crystallite surface. It appears that zeolite structures with intersecting 10- and 8-ring pores may be better supports for stabilizing nanometric PdO particles than those with the uniform 10-ring size or with the 12-ring pore system.
- Keywords
- Methane combustion; Zeolite-supported Pd catalysts; Support microstructure; ABSORPTION FINE-STRUCTURE; METAL-EXCHANGED ZEOLITES; COMPLETE OXIDATION; LOW-TEMPERATURE; ACID SITES; PALLADIUM
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/28430
- DOI
- 10.1007/s11244-008-9135-7
- ISSN
- 1022-5528
- Article Type
- Article
- Citation
- TOPICS IN CATALYSIS, vol. 52, no. 39815, page. 27 - 34, 2009-03
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