| Journal: | Brazilian journal of chemical engineering |
| Database: | PERIÓDICA |
| System number: | 000308702 |
| ISSN: | 0104-6632 |
| Authors: | Martins, E.P1 Aranda, D.A.G Pessoa, F.L.P Zotin, J.L2 |
| Institutions: | 1Universidade Federal do Rio de Janeiro, Escola de Quimica, Rio de Janeiro. Brasil 2Petroleo Brasileiro S.A., Centro de Pesquisas da Petrobras, Rio de Janeiro. Brasil |
| Year: | 2000 |
| Season: | Sep |
| Volumen: | 17 |
| Number: | 3 |
| Pages: | 361-366 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | Reactions under supercritical conditions have been employed in many processes. Furthermore, an increasing number of commercial reactions have been conducted under supercritical or near critical conditions. These reaction conditions offer several advantages when compared to conditions in conventional catalytic processes in liquid-phase, gas-liquid interface, or even some gas-phase reactions. Basically, a supercritical solvent can diminish the reactants transport resistance from the bulk region to the catalyst surface due to enhancement of liquid diffusivity values and better solubility than those in different phases. Another advantage is that supercritical solvents permit prompt and easy changes in intermolecular properties in order to modify reaction parameters, such as conversion or selectivity, or even proceed with the separation of reaction products. Diesel fractions from petroleum frequently have larger than desirable quantities of aromatic compounds. Diesel hydrogenation is intended to decrease these quantities, i.e., to increase the quantity of paraffin present in this petroleum fraction. In this work, the hydrogenation of tetralin was studied as a model reaction for the aromatic hydrogenation process. A conventional gas-liquid-solid catalytic process was compared with that of supercritical carbon dioxide substrate under similar conditions. Additionally, an equilibrium conversion diagram was calculated for this reaction in a wide range of temperature and reactant ratios, so as to optimize the operational conditions and impro |
| Disciplines: | Química |
| Keyword: | Ingeniería química, Diesel, Hidrogenación, Soluciones supercríticas, Dióxido de carbono |
| Keyword: | Chemistry, Chemical engineering, Diesel, Hydrogenation, Supercritical solutions, Carbon dioxide |
| Full text: | Texto completo (Ver HTML) |
