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Preparation and characterization of V-K catalysts supported on porous α-alumina ceramic substrate for diesel soot oxidation

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Abstract

The V-K catalysts were produced on porous α-alumina substrate by a solution impregnation route and the compositions and catalytic activities for soot oxidation were studied by XRD, TG/DTG, DSC and TPR. According to the catalytic activity studies, the catalytic activity of the crystalline phases is in the order: KNO3+KVO3>K3V5O14+KVO3. The appearance of excessive KHCO3 phase will lead to the deterioration of catalytic activity when the catalysts contain higher KNO3 content. It is also found that when the K:V molar ratio is higher than 1:1, the prepared catalysts show a strong CO2 absorption characteristic and this behavior will become gradually significant with the increasing of K:V molar ratio. Considerable amount of absorbed CO2 are strongly bonded to the crystal lattice with onset desorption temperature of 200 °C.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China

    Li’na Sui  (隋丽娜) & Liyan Yu

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  1. Li’na Sui  (隋丽娜)
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  2. Liyan Yu
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Correspondence to Li’na Sui  (隋丽娜).

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Funded by the Foundation for Scientific Research Encouragement to Middle-aged and Young Scientists of Shandong Province (No. 2007BS04003)

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Sui, L., Yu, L. Preparation and characterization of V-K catalysts supported on porous α-alumina ceramic substrate for diesel soot oxidation. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 24, 810–814 (2009). https://doi.org/10.1007/s11595-009-5810-1

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  • DOI: https://doi.org/10.1007/s11595-009-5810-1

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