Study on Catalytic Combustion Performance of K-supported Sn0.4Ce0.6O2 Catalysts for Soot
[1]ZHANG Changsen,LI Congcong,DAI Wenyue,et al.Study on Catalytic Combustion Performance of K-supported Sn0.4Ce0.6O2 Catalysts for Soot[J].Journal of Zhengzhou University (Engineering Science),2023,44(04):74-79.[doi:10.13705/j.issn.1671-6833.2023.01.004]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
44卷
Number of periods:
2023 04
Page number:
74-79
Column:
Public date:
2023-06-01
- Title:
- Study on Catalytic Combustion Performance of K-supported Sn0.4Ce0.6O2 Catalysts for Soot
- Keywords:
- soot; catalytic oxidation; co-precipitation; alkali metals; Sn0. 4Ce0. 6O2
- CLC:
- X701；TQ426
- DOI:
- 10.13705/j.issn.1671-6833.2023.01.004
- Abstract:
- Catalytic combustion is one of the most effective purification technologies to remove soot particles from diesel engine exhaust. In order to improve the mobility of atoms on the catalyst surface and the low-temperature oxidation-reduction ability of the catalyst, the catalytic combustion performance of soot was studied by using alkali metal K-supported SnxCe1- xO2 catalyst. The SnxCe1- xO2 catalyst was obtained by doping Sn and Ce according to the ratio of different substances by co-precipitation method. The activity of the catalyst was evaluated in a micro fixed bed temperature programmed reactor, and it was found that the catalyst had the best catalytic performance when n Sn ∶n Ce = 4 ∶6. Then, a series of xK / Sn-Ce catalysts with higher activity were prepared by impregnation, and characterized by XRD, XPS, H2 -TPR, and O2 -TPD. The results showed that the concentration of active oxygen on the surface of loading K was increased, the oxygen transfer rate was accelerated, and the redox ability was improved. When the K loading is 15% ( x = 15%) , the catalyst has the best removal effect on soot, the selectivity of CO2 in the product reaches 94. 3%, and the T90 temperature is 388 ℃ . This research provides an important reference for the design of efficient soot combustion catalysts.
- References:
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Last Update:
2023-07-01