کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9608153 | 46074 | 2005 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ru, Os and Ru-Os supported on mesoporous silica doped with zirconium as mild thio-tolerant catalysts in the hydrogenation and hydrogenolysis/hydrocracking of tetralin
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Ru, Os and Ru-Os supported on mesoporous silica doped with zirconium as mild thio-tolerant catalysts in the hydrogenation and hydrogenolysis/hydrocracking of tetralin Ru, Os and Ru-Os supported on mesoporous silica doped with zirconium as mild thio-tolerant catalysts in the hydrogenation and hydrogenolysis/hydrocracking of tetralin](/preview/png/9608153.png)
چکیده انگلیسی
Monometallic Ru and Os catalysts and bimetallic Ru-Os catalysts with molar ratios (8:1, 4:1 and 1:1) supported on a mesoporous silica doped with zirconium (molar ratio Si/Zr = 5) with a total metal loading of 5 wt.% were prepared by the wet incipient impregnation method, then dried at 120 °C and finally reduced with hydrogen at 400 °C. After a complete characterisation with XRD, XPS, N2 adsorption-desorption volumetry, H2-TPR and NH3-TPD, the catalysts were tested in the hydrogenation and ring opening of tetralin at high hydrogen pressure. Catalysts with a high Ru content display excellent hydrogenation properties even at low reaction temperatures (200-295 °C). However, catalysts with a high Os content display weak hydrogenation activity but a very good hydrogenolysis/hydrocracking activity (30-40% of cracking compounds). This high level of activity is explained by the strength of the acid centres. Catalysts with a high Ru content maintain their catalytic performance in the presence of 600 ppm of dibenzopthiophene in the feed at 320 °C, but all other catalysts are partially or totally deactivated. All catalysts are irreversibly poisoned with a feed containing 1000 ppm of dibenzothiophene.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 279, Issues 1â2, 28 January 2005, Pages 209-221
Journal: Applied Catalysis A: General - Volume 279, Issues 1â2, 28 January 2005, Pages 209-221
نویسندگان
D. Eliche-Quesada, J.M. Mérida-Robles, E. RodrÃguez-Castellón, A. Jiménez-López,