التفاصيل البيبلوغرافية
| العنوان: |
Characterization and catalytic behavior of MoO3/V2O5/Nb2 O5 systems in isopropanol decomposition |
| المؤلفون: |
Paiva Jr, J. B. de, Monteiro, W. R., Zacharias, M. A., Rodrigues, J. A. J., Cortez, G. G. |
| المصدر: |
Brazilian Journal of Chemical Engineering. December 2006 23(4) |
| بيانات النشر: |
Brazilian Society of Chemical Engineering, 2006. |
| سنة النشر: |
2006 |
| مصطلحات موضوعية: |
Niobium oxide, Vanadium oxide, Molybdenum oxide, Isopropanol conversion |
| الوصف: |
The influence of molybdenum oxide as a promoter on the V2O5/Nb2O5 system was investigated. A series of MoO3/V2O5/Nb2 O5 catalysts, with MoO3 loading ranging from 1 to 3 wt% MoO3 and fixed V2O5 content (21 wt%), were prepared by impregnation of the Nb2O5 support with an aqueous solution of ammonium metavanadate and ammonium molybdate. The acid-base properties of the catalysts were investigated to determine of the selectivity of the isopropanol decomposition reaction. The X-ray diffraction results showed the presence of the beta-(Nb,V)2O5 phase. The temperature-programmed reduction profiles showed that the reducibility of vanadium was affected by the presence of molybdenum oxide. Activity results for isopropanol decomposition revealed that the acid-base properties of V2O5/Nb2O5 catalysts are affected upon incorporation of MoO3, specifically for loadings of 3 wt %. For this catalyst composition both propylene and acetone formation rates decreased. |
| نوع الوثيقة: |
article |
| وصف الملف: |
text/html |
| اللغة: |
English |
| تدمد: |
0104-6632 |
| DOI: |
10.1590/S0104-66322006000400009 |
| URL الوصول: |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322006000400009 |
| Rights: |
info:eu-repo/semantics/openAccess |
| رقم الانضمام: |
edssci.S0104.66322006000400009 |
| قاعدة البيانات: |
SciELO |
Full Text Finder