Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió acceptadaData de publicació
Llicència de publicació
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/101839
Kinetic modeling of the simultaneous etherification of ethanol with C4 and C5 olefins over Amberlyst 35 using model averaging
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
A kinetic study on the simultaneous liquid-phase etherification of ethanol with isobutene (IB), 2-methyl-1-butene (2M1B) and 2-methyl-2-butene (2M2B) catalyzed by Amberlyst¿ 35 to form ethyl tert-butyl ether (ETBE) and tert-amyl ethyl ether (TAEE) is presented. Isothermal experimental runs were carried out in a stirred tank batch reactor in the temperature range 323-353 K at 2.0 MPa, starting from different initial concentrations. Obtained reaction rates were free of catalyst load, internal, and external mass transfer effects. Mathematical fitting of a series of systematically originated models, model selection, and model averaging procedures were applied to find the best model and to draw conclusions about the reaction mechanism. The selected model involves a saturated catalytic surface with the participation of two active sites in etherification reactions and one active site in isoamylenes isomerization. Apparent activation energies for ETBE formation from IB and EtOH, TAEE formation from 2M1B and EtOH, TAEE formation from 2M2B and EtOH, and double bond isomerization between 2M1B and 2M2B were 72.8±1.4, 74.9±2.8, 81.2±2.2 and, 76.5±7.2 kJ/mol, respectively. The alkenes with the double bond in terminal position were more reactive towards EtOH than 2M2B, with the double bond in internal position.
Matèries
Matèries (anglès)
Citació
Citació
SOTO LÓPEZ, Rodrigo, FITÉ PIQUER, Carles, RAMÍREZ RANGEL, Eliana, BRINGUÉ TOMÀS, Roger, CUNILL GARCÍA, Fidel. Kinetic modeling of the simultaneous etherification of ethanol with C4 and C5 olefins over Amberlyst 35 using model averaging. _Chemical Engineering Journal_. 2016. Vol. 307, núm. 122-134. [consulta: 21 de gener de 2026]. ISSN: 1385-8947. [Disponible a: https://hdl.handle.net/2445/101839]