کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
59562 | 1419439 | 2014 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effect of sulfur poisoning on Co3O4/CeO2 composite oxide catalyst for soot combustion Effect of sulfur poisoning on Co3O4/CeO2 composite oxide catalyst for soot combustion](/preview/png/59562.png)
CeO2, Co3O4, and a series of Co3O4/CeO2 composite oxides prepared by co-precipitation were exposed to SO2 under an oxidizing environment at 400 °C. These fresh and SO2-poisoned samples were characterized by in situ diffuse reflectance infrared Fourier transform spectroscopy, X-ray diffraction, temperature-programmed desorption, and X-ray photoelectron spectroscopy. Sulfates were formed on the oxides, with more sulfates on CeO2 than on Co3O4. On the Co3O4/CeO2 composite oxides, both cobalt sulphate and ceria sulfate were formed. Fresh and sulfated samples were tested for soot combustion in a NO/O2 gas flow. The Co3O4/CeO2 composite oxides showed better SO2 tolerance and higher activity than CeO2 but were more easily poisoned by SO2 than Co3O4.
Graphical AbstractCo3O4/CeO2 composite oxides showed better SO2 tolerance and higher activity than CeO2 but was more easily poisoned by SO2 than Co3O4 during soot combustion in NO/O2.Figure optionsDownload as PowerPoint slide
Journal: Chinese Journal of Catalysis - Volume 35, Issue 9, September 2014, Pages 1504–1510