The Effects of Alkaline Earth Metals on Catalytic Activities of K-Sm-Based Catalysts for Diesel Soot Oxidation
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- 作者：Lina Sui ; Liyan Yu ; and Yongheng Zhang
- 刊名：Energy & Fuels
- 出版年：2006
- 出版时间：July 2006
- 年：2006
- 卷：20
- 期：4
- 页码：1392 - 1397
- 全文大小：243K
- 年卷期：v.20,no.4(July 2006)
- ISSN：1520-5029
文摘
The K-Sm catalysts added with alkaline earth metals supported on an 
-porous alumina ceramic substratehave been prepared. XRD and TG-DSC were used to characterize the catalysts, and their catalytic activitieswere evaluated by a soot oxidation reaction using the TPR system. The TPR study showed that the catalystwith an 8.41 KNO3:Mg ratio had the lowest soot onset ignition temperature at about 318 
C. It is very likelythat the formation of liquid phases improves the catalyst/soot contact condition, which increases the catalyticactivity of the catalyst. The catalyst containing a higher KNO3 content exhibits CO2 adsorption, whereas adefinite-ratio alkaline earth metal can restrain the adsorption of CO2 and the formation of Sm2O2CO3 with aKNO3 content less than a specified quantity.
-porous alumina ceramic substratehave been prepared. XRD and TG-DSC were used to characterize the catalysts, and their catalytic activitieswere evaluated by a soot oxidation reaction using the TPR system. The TPR study showed that the catalystwith an 8.41 KNO3:Mg ratio had the lowest soot onset ignition temperature at about 318 C. It is very likelythat the formation of liquid phases improves the catalyst/soot contact condition, which increases the catalyticactivity of the catalyst. The catalyst containing a higher KNO3 content exhibits CO2 adsorption, whereas adefinite-ratio alkaline earth metal can restrain the adsorption of CO2 and the formation of Sm2O2CO3 with aKNO3 content less than a specified quantity.