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Preparation and Characterization of V-K Catalysts Supported on Porous α-alumina Ceramic Substrate for Diesel Soot Oxidation 被引量:1

Preparation and Characterization of V-K Catalysts Supported on Porous α-alumina Ceramic Substrate for Diesel Soot Oxidation
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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 ℃. 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 ℃.
作者 隋丽娜
出处 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2009年第5期810-814,共5页 武汉理工大学学报(材料科学英文版)
基金 Funded by the Foundation for Scientific Research Encouragement to Middle-aged and Young Scientists of Shandong Province (No. 2007BS04003)
关键词 V-K catalyst oxidation diesel soot catalytic activity V-K catalyst oxidation diesel soot catalytic activity
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