| Titre : | Kinetics of the hydration of ethylene oxide in the presence of heterogeneous catalyst (2010) |
| Auteurs : | Mehmet Riza Altiokka, Auteur ; Sema Akyalçin, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 48 N° 24, Décembre 2009) |
| Article en page(s) : | pp. 10840–10844 |
| Note générale : | Chemical engineering |
| Langues : | Anglais |
| Tags : | Ethylene oxideKinetic data Pressurized batch reactor |
| Résumé : | Kinetic data on the hydration of ethylene oxide was obtained from both uncatalyzed and heterogeneously catalyzed reactions using a pressurized batch reactor. Amberjet 4200/HCO3− was used as the heterogeneous catalyst, which was found to be the most effective among the four types of cross-linked styrene−divinylbenzene anion-exchange resins tested. The reactions were proved to follow a series-parallel irreversible homogeneous mechanism under both catalyzed and uncatalyzed conditions. Thus the corresponding rate expression can be given as −rEtO = k1CWCEtO + k2CMEGCEtO + k3CDEGCEtO. The rate constants were determined by applying the method of averages at different temperatures. The temperature dependency of the rate constants was found to be k1/[L/(mol·min)] = exp(13.62 − 8220/T), k2/[L/(mol·min)] = exp(15.57 − 8700/T), and k3/[L/(mol·min)] = exp(16.06 − 8900/T) for the uncatalyzed reactions and k1/[L/(mol·min)] = exp(19.60 − 9580/T), k2/[L/(mol·min)] = exp(20.19 − 10171/T), and k3/[L/(mol·min)] = exp(19.06 − 9743/T) in the presence of catalyst of 0.15 mol of HCO3−/L in equivalent, where T is the absolute temperature in kelvin. |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie901037w |
