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Title: | Kinetics of the liquid phase dehydration of 1-octanol to di-n-octyl ether on Amberlyst 70 |
Author: | Casas Fernández, Carlos Bringué Tomàs, Roger Fité Piquer, Carles Iborra Urios, Montserrat Tejero Salvador, Xavier |
Keywords: | Resines de bescanvi iònic Èters Cinètica enzimàtica Alcohols Catàlisi Ion exchange resins Ethers Enzyme kinetics Alcohols Catalysis |
Issue Date: | 17-Apr-2017 |
Publisher: | American Institute of Chemical Engineers (AIChE) |
Abstract: | The kinetics of the liquid phase dehydration of 1-octanol to di-n-octyl ether (DNOE) over Amberlyst 70 was studied at 413-453K. Mechanistic rate models assuming water and 1-octanol adsorbed on the resin, and the free sites fraction negligible, were selected from 1-octanol dehydration experiments. Next, the influence of DNOE, water and 1,4-dioxane (solvent) concentration was evaluated. DNOE and 1,4-dioxane do not affect significantly the reaction rate, while water inhibits it strongly. Water effect was quantified by splitting the rate constant into a 'true one' and a correction factor related to the fraction of active sites blocked by water. The best kinetic model stemmed from an Eley-Rideal mechanism with water adsorbed onto the resin and DNOE released directly to the liquid phase, with a correction factor for water inhibitory effect based on a Freundlich isotherm-like function; activation energy being 110±5 kJ·mol-1 based in line with literature data on homologous reactions. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1002/aic.15741 |
It is part of: | AIChE Journal, 2017, vol. 63, num. 9, p. 3966-3978 |
URI: | http://hdl.handle.net/2445/115030 |
Related resource: | https://doi.org/10.1002/aic.15741 |
ISSN: | 0001-1541 |
Appears in Collections: | Articles publicats en revistes (Enginyeria Química i Química Analítica) |
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673238.pdf | 1.88 MB | Adobe PDF | View/Open |
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