High-temperature desulfurization with nanosize Zno?

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Please use this identifier to cite or link to this item: http://140.128.103.80:8080/handle/310901/21581

Title:	High-temperature desulfurization with nanosize Zno?
Authors:	Wang, T.C., Kang, H.Y., Paul Wang, H., Jou, C.J.G., Wei, Y.L.
Contributors:	Department of Environmental Science and Engineering, Tunghai University
Keywords:	Desulfurization;EXAFS;Nanosize ZnO;XANES
Date:	2010-06-21
Issue Date:	2013-05-15T09:02:25Z (UTC)
Publisher:	Anaheim
Abstract:	Thermal efficiencies of an integrated gasification combined cycle (IGCC) process can be enhanced with high-temperature desulfurization. Nanosize, sub-nano (clusters) and atomic-dispersed ZnO were prepared for the high-temperature desulfurization. An enhanced absorbance of the nanosize ZnO at 9668 eV is found by X-ray absorption near edge structure (XANES) spectroscopy. ZnO clusters are also observed in the channels of MCM-41. By temperature programmed sulfurization (TPS) and oxidization (TPO), it is found that the nanosize ZnO can be effectively sulfurized and regenerated (with air) at 940-950 K. The smaller ZnO clusters in MCM-41 can be sulfurized at relatively lower temperatures (700-820 K). The atomic dispersed ZnO on TiO 2 having the strong metal-support interactions cannot be sulfurized at the temperatures of <960 K, and interestingly a small amount of ZnS can be regenerated at much lower temperatures (i.e., <650 K). It seems that the nano- or sub-nano-(cluster)-size dispersed ZnO may be desired for the high-temperature desulfurization especially for a high efficiency IGCC based electric power generation process.
Relation:	Nanotechnology 2010: Bio Sensors, Instruments, Medical, Environment and Energy - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010 3 , pp. 639-641
Appears in Collections:	[環境科學與工程學系所] 會議論文

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