Influence of Cr/Zr ratio on activity of Cr-Zr oxide catalysts in non-oxidative propane dehydrogenation
Two series of chromium-zirconium mixed oxide catalysts with different Cr/Zr molar ratio are prepared by co-precipitation method. Porous structure of the catalysts is studied by lowtemperature N2 adsorption-desorption. Phase composition and chromium states in the catalysts are characterized by X-ray...
| Published in: | Crystals Vol. 11, № 11. P. 1435 (1-12) |
|---|---|
| Other Authors: | , , , |
| Format: | Article |
| Language: | English |
| Subjects: | |
| Online Access: | http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000892181 Перейти в каталог НБ ТГУ |
| Summary: | Two series of chromium-zirconium mixed oxide catalysts with different Cr/Zr molar ratio are prepared by co-precipitation method. Porous structure of the catalysts is studied by lowtemperature N2 adsorption-desorption. Phase composition and chromium states in the catalysts are characterized by X-ray diffraction (XRD), UV-visible spectroscopy, and temperature-programmed reduction with hydrogen (TPR-H2). The mixed catalysts are tested in non-oxidative dehydrogenation of propane at 550 C. The catalysts synthesized without ageing of precipitate show higher activity in propane dehydrogenation due to the higher content of reducible Cr+5/+6 species due to its stabilization on the ZrO2 surface. |
|---|---|
| Bibliography: | Библиогр.: 52 назв. |
| ISSN: | 2073-4352 |