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Title: | Thermodynamic equilibrium for the dehydration of 1-butanol to di-n-butyl ether |
Author: | Pérez-Maciá, María Ángeles Bringué Tomàs, Roger Iborra Urios, Montserrat Tejero Salvador, Xavier Cunill García, Fidel |
Keywords: | Èters Alcohol butílic Resines de bescanvi iònic Ethers Butanol Ion exchange resins |
Issue Date: | 11-Jun-2015 |
Publisher: | Elsevier B.V. |
Abstract: | The thermodynamic equilibrium of the bimolecular dehydration of 1-butanol to di-n-butyl ether (DNBE) and water in the liquid phase was studied. Equilibrium experiments were performed at 4 MPa and in the temperature range of 413-463 K over the ion exchange resin Amberlyst-70. The thermodynamic equilibrium for the side reactions (dehydration to 1-butene, olefins isomerization, olefins hydration and branched ether formation) was also studied. The equilibrium constant for the dehydration reaction of 1-butanol to di-n-butyl ether and water was found to be independent on the operating temperature, within the limits of the experimental error ( 5.2%). The experimental equilibrium constants at 413-463 K allows to estimate the standard enthalpy change of reaction (ΔrH0(l) = -0.3 ± 2.9 kJ¿mol-1) and the standard entropy change of reaction (ΔrS0(l) = 26.8 ± 6.7 J¿mol-1¿K-1). From these values the standard formation enthalpy (ΔfH0DNBE,(l)) and the molar entropy of DNBE (S0DNBE,(l)) at 298.15 K were computed to be -370.5 ± 10.9 kJ¿mol-1 and 408.3 ± 6.8 J¿mol-1¿K-1 respectively |
Note: | Versió postprint del document publicat a: http://dx.doi.org/10.1016/j.cherd.2015.06.007 |
It is part of: | Chemical Engineering Research & Design, 2015, vol. 102, p. 186-195 |
URI: | http://hdl.handle.net/2445/99072 |
Related resource: | http://dx.doi.org/10.1016/j.cherd.2015.06.007 |
ISSN: | 0263-8762 |
Appears in Collections: | Articles publicats en revistes (Enginyeria Química i Química Analítica) |
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