NOx Adsorption on CeO2-supported ZrO2 Nanometer Powders Prepared in Water-in-Oil Microemulsion

Abstract

Abstract: ZrO₂ nanometer powders sizing around 5-8 nm were prepared in water in oil(W/O) microemulsion, and TEM, XRD, N₂ adsorption were employed to characterize the powders. A Ce-Zr-m sample was obtained after incipiently impregnating the above powders with a Ce(NO₃)₃ aqueous solution. NO_x adsorption was conducted on the sample in a fluidized thermal analysis system and the maximum adsorption amounts of 35.5, 17.5 and 9.5 mg NO_x per gram sorbent were obtained at 25, 100 and 200 ℃, respectively, on the Ce-Zr-m sample. It is not worthy that the value at 100 ℃ was 25 times higher than that on the CeO₂ supported ZrO₂ sample prepared by conventional precipitation.

Key words: Nitric oxide, Nanometer zrconia, Adsorption, Reverse microemulsion

CLC Number:

O643.1

TrendMD:

LI Wei-Bin, YANG Xu-Fei . NO_x Adsorption on CeO₂-supported ZrO₂ Nanometer Powders Prepared in Water-in-Oil Microemulsion[J]. Chem. J. Chinese Universities, 2002, 23(6): 1140.

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NO_x Adsorption on CeO₂-supported ZrO₂ Nanometer Powders Prepared in Water-in-Oil Microemulsion

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