Kinetics of the degradation by catalytic hydrogenation of tyrosol, a model molecule present in olive oil waste waters
✍ Scribed by Dominique Richard; María de Lourdes Delgado-Nuñez
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 2003
- Tongue
- English
- Weight
- 154 KB
- Volume
- 78
- Category
- Article
- ISSN
- 0268-2575
- DOI
- 10.1002/jctb.876
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✦ Synopsis
Abstract
Olive mill wastewaters (OMW) constitute an important environmental problem due, among other things, to their high phenolic content. The phytotoxicity of polyphenols makes them resistant to biological treatment. A three‐step process comprising adsorption–concentration, catalytic hydrogenation and regeneration on a fixed bed of adsorbent–catalyst was investigated to remove such compounds. Tyrosol (2‐(4‐hydroxyphenyl)‐ethanol) was taken as representative of the polyphenols present in OMW. The catalytic hydrogenation of tyrosol by 30 g kg^−1^ ruthenium/activated carbon catalyst was carried out in order to establish the reaction mechanism and kinetics necessary for the design of a pilot‐scale reactor. Total conversion of tyrosol into non‐aromatic compounds was achieved under mild conditions of temperature and pressure. The overall rate of tyrosol removal at 4 MPa and 353 K was $\hbox{11.26 g h}^{-1} \hbox{g}^{-1}_{\rm{catalyst}}$. Copyright © 2003 Society of Chemical Industry