Enhancement of NO-elimination activity of Co-silicate catalyst by high-temperature calcination in steam-containing air |
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Authors: | Koji Kagawa Shigeto Kon Shinji Iwamoto Tomoyuki Inui |
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Affiliation: | (1) Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan |
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Abstract: | H–Co-silicate having an MFI structure (CoMFI), calcined in steam-containing air at 800°C (CoMFI-800S), was characterized by XRD and diffuse reflectance electron absorption (EA). The calcination educed some of the Co ions from the CoMFI framework to make small clusters nearby. The CoMFI-800S performance in NO elimination in the presence of excess O2 was compared with that of Co supported on siliceous MFI zeolite ([Co]SiMFI), Co supported on H–Co-silicate ([Co]CoMFI), and a physical mixture of CoMFI and [Co]SiMFI (Co+[Co]). The educed Co ions enhanced NO elimination due to the uniform and isolated dispersion of oxidized Co clusters. This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | Co-silicate high-temperature calcination steam supported Co catalyst non-framework Co NO elimination |
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