Preparation and Characterization of V-K Catalysts Supported on Porous α-alumina Ceramic Substrate for Diesel Soot Oxidation
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2009年第5期
论文作者：隋丽娜
文章页码：810 - 814
摘 要：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 ℃.
隋丽娜
College of Materials Science and Engineering, Qingdao University of Science and Technology
摘 要：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 ℃.
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