کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10241556 | 46570 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Novel Pd/SnxZr1âxO2 catalysts for methane total oxidation at low temperature and their 18O-isotope exchange behavior
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
SnxZr1âxO2 solid solution-supported palladium catalysts were prepared and evaluated for the catalytic combustion of methane at low temperature. Catalyst Pd/Sn0.4Zr0.6O2 with the highest activity (T90% = 378 °C, GHSV = 48,000 hâ1) and excellent stability is one of the most active catalysts so far reported. The 18O-isotope exchange measurements show that both partial and complete heterogeneous exchanges, as well as oxygen release, were observed for all catalysts. Compared with other catalysts, Pd/Sn0.4Zr0.6O2 has much higher activity for oxygen-exchange reaction and higher temperature for bulk palladium oxide decomposition. The results of TPR and 18O-isotope exchange experiments demonstrate that the excellent activity of Pd/Sn0.4Zr0.6O2 is due to its high oxygen mobility and moderate reducibility. XPS results indicate that the dispersion of Pd has little influence on the catalytic activity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis B: Environmental - Volume 57, Issue 3, 10 May 2005, Pages 175-181
Journal: Applied Catalysis B: Environmental - Volume 57, Issue 3, 10 May 2005, Pages 175-181
نویسندگان
W. Lin, L. Lin, Y.X. Zhu, Y.C. Xie, K. Scheurell, E. Kemnitz,