Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/101839
Title: Kinetic modeling of the simultaneous etherification of ethanol with C4 and C5 olefins over Amberlyst 35 using model averaging
Author: Soto, R. (Rodrigo)
Fité Piquer, Carles
Ramírez Rangel, Eliana
Bringue Tomás, Roger
Cunill García, Fidel
Keywords: Cinètica química
Èter (Espai)
Chemical kinetics
Ether (Space)
Issue Date: 4-Aug-2016
Publisher: Elsevier B.V.
Abstract: 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.
Note: Versió postprint del document publicat a: http://dx.doi.org/10.1016/j.cej.2016.08.038
It is part of: Chemical Engineering Journal, 2016, vol. 307, p. 122-134
Related resource: http://dx.doi.org/10.1016/j.cej.2016.08.038
URI: http://hdl.handle.net/2445/101839
ISSN: 1385-8947
Appears in Collections:Articles publicats en revistes (Enginyeria Química i Química Analítica)

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