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Catalytic combustion is a good way for VOC removal. The key issue is the availability of an effective catalyst. MO x (M = Co, Fe, Mn, Cr) was fabricated with a three-dimensionally (3D) or 3D-ordered macroporous (3DOM) structure using nitrate of Co, Fe, Mn, or Cr as metal source. These materials exhibited excellent catalytic activities for the combustion of formaldehyde, acetone, methanol, and toluene. KIT-6- and SBA-16-templating derived samples possessed ordered mesoporous architectures with crystalline walls. The formation of nanovoids within the walls of the 3DOM-structured Fe 2O 3-2 sample was observed. Compared to the corresponding bulk metal oxides, the macro- or mesoporous counterparts showed higher surface oxygen species amount and were more reducible at low temperatures. The porous materials displayed much better catalytic activities than the bulk counterparts in VOC combustion. The unusual catalytic performance of the porous transition-metal oxides was related to their better low-temperature reducibility, 3D-ordered mesoporous, or 3DOM architecture, higher surface oxygen species concentration, and larger surface area. This is an abstract of a paper presented at the 2011 AIChE Annual Meeting (Minneapolis, MN 10/16-21/2011).
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11AIChE - 2011 AIChE Annual Meeting, Conference Proceedings
Year: 2011
Language: English
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30 Days PV: 2