| Journal: | Brazilian journal of chemical engineering |
| Database: | PERIÓDICA |
| System number: | 000309067 |
| ISSN: | 0104-6632 |
| Authors: | Paiva-Junior, J.B. de1 Monteiro, W.R2 Zacharias, M.A Rodrigues, J.A.J Cortez, G.G |
| Institutions: | 1Universidade de Sao Paulo, Escola de Engenharia de Lorena, Lorena, Sao Paulo. Brasil 2Instituto Nacional de Pesquisas Espaciais, Laboratorio Associado de Combustao e Propulsao, Cachoeira Paulista, Sao Paulo. Brasil |
| Year: | 2006 |
| Season: | Dic |
| Volumen: | 23 |
| Number: | 4 |
| Pages: | 517-524 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | 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 |
| Disciplines: | Química |
| Keyword: | Ingeniería química, Catálisis, Oxido de niobio, Oxido de vanadio, Oxido de molibdeno, Isopropanol, Conversión química |
| Keyword: | Chemistry, Chemical engineering, Catalysis, Niobium oxide, Vanadium oxide, Molybdenum oxide, Isopropanol, Chemical conversion |
| Full text: | Texto completo (Ver HTML) |
