Solvent effects in the catalytic hydrotreament of haloaromatics over Pd/Al2O3 in water+organic mixtures |
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| Authors: | Santiago Gómez-Quero Elena Díaz Fernando Cárdenas-Lizana Mark A. Keane |
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| Affiliation: | 1. Chemical Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, UK;2. Sección de Ingeniería Química, Facultad de Ciencias, Universidad Autónoma de Madrid, Campus de Cantoblanco, 28049 Madrid, Spain |
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| Abstract: | Solvent effects have been studied for the liquid phase (atmospheric pressure, T=303 K) hydrodehalogenation (HDH) of a range of haloarenes in methanol, THF, water+methanol and water+THF promoted by Pd/Al2O3. The catalyst has been characterized in terms of temperature programmed reduction, XRD, TEM, BET and pore volume measurements: the active Pd phase is present as nano-scale particles (<1–6 nm, surface area weighted mean diameter=2.4 nm). In the absence of transport limitations, catalyst deactivation and secondary reactions, the following sequence of increasing dehalogenation rate has been established: dichlorophenol(s)
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