| Journal: | Brazilian journal of chemical engineering |
| Database: | PERIÓDICA |
| System number: | 000308770 |
| ISSN: | 0104-6632 |
| Authors: | Vieira, R1 Cruz, G.M2 Rodrigues, J.A.J |
| Institutions: | 1Instituto Nacional de Pesquisas Espaciais, Cachoeira Paulista, Sao Paulo. Brasil 2Faculdade de Engenharia Quimica de Lorena, Lorena, Sao Paulo. Brasil |
| Year: | 2001 |
| Season: | Dic |
| Volumen: | 18 |
| Number: | 4 |
| Pages: | 359-365 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | The aim of this work was to prepare tungsten oxycarbides by Temperature Programmed Reaction (TPR), starting with previously molded macroporous tungsten oxide (WO3). The tungsten oxycarbides were prepared by one of two different methods: direct carburization with CH4/H2 to obtain WC or preliminary formation of nitrides with NH3 to obtain W2N, followed by carburization to W2C and WC with CH4/H2. Results suggested that the carburization of the W2N was incomplete, resulting in an oxycarbonitride, or did not occur at all, with the end material being W2N. From among the materials prepared, two catalysts were selected as a function of their mechanical properties, and their performances were compared with a 2 N microthruster using the Shell 405 commercial catalyst in the reaction of hydrazine decomposition |
| Disciplines: | Química |
| Keyword: | Química organometálica, Ingeniería química, Oxicarburo de tungsteno, Macroporosidad, Resistencia mecánica, Hidrazina |
| Keyword: | Chemistry, Organometallic chemistry, Chemical engineering, Tungsten oxycarbide, Macroporosity, Mechanical strength, Hydrazine |
| Full text: | Texto completo (Ver HTML) |
