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Title: Kinetic study of 1-butanol dehydration to di-n-butyl ether over Amberlyst 70
Author: Pérez-Maciá, María Ángeles
Bringue Tomás, Roger
Iborra Urios, Montserrat
Tejero Salvador, Xavier
Cunill García, Fidel
Keywords: Resines de bescanvi iònic
Cinètica enzimàtica
Ion exchange resins
Enzyme kinetics
Issue Date: 1-Jan-2016
Publisher: American Institute of Chemical Engineers (AIChE)
Abstract: Kinetics of the catalytic dehydration of 1-butanol to di-n-butyl ether (DNBE) over Amberlyst 70 was investigated. Experiments were performed in liquid phase at 4 MPa and 413 463 K. Three elementary reaction mechanisms were considered: a Langmuir‐Hinselwood‐ Hougen‐Watson (LHHW) formulation; an Eley-Rideal (ER) formulation in which DNBE remains adsorbed; an ER formulation in which water remains adsorbed. Two kinetic models explain satisfactorily the dehydration of 1-butanol to DNBE: a LHHW formalism in which the surface reaction between two adjacent adsorbed molecules of 1-butanol is the rate limiting step (RLS) and where the adsorption of water is negligible, and a mechanism in which the RLS is the desorption of water being the adsorption of DNBE negligible. In both models the strong inhibiting effect of water was successfully taken into account by means of a correction factor derived from a Freundlich adsorption isotherm. Both models present similar values of apparent activation energies (122±2 kJ/mol)
Note: Versió postprint del document publicat a:
It is part of: AIChE Journal, 2016, vol. 62, num. 1, p. 180-194
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ISSN: 0001-1541
Appears in Collections:Articles publicats en revistes (Enginyeria Química i Química Analítica)

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