Supported Cu(II) polymer catalysts for aqueous phenol oxidation

Castro, Isabel U; Stüber, Frank; Fabregat, Azael; Font, Josep; Fortuny, Agustí; Bengoa, Christophe (2009). Supported Cu(II) polymer catalysts for aqueous phenol oxidation. Journal of hazardous materials, 163(2-3), pp. 809-15. Amsterdam: Elsevier 10.1016/j.jhazmat.2008.07.054

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Supported Cu(II) polymer catalysts were used for the catalytic oxidation of phenol at 30 degrees C and atmospheric pressure using air and H(2)O(2) as oxidants. Heterogenisation of homogeneous Cu(II) catalysts was achieved by adsorption of Cu(II) salts onto polymeric matrices (poly(4-vinylpyridine), Chitosan). The catalytic active sites were represented by Cu(II) ions and showed to conserve their oxidative activity in heterogeneous catalysis as well as in homogeneous systems. The catalytic deactivation was evaluated by quantifying released Cu(II) ions in solution during oxidation, from where Cu-PVP(25) showed the best leaching levels no more than 5 mg L(-1). Results also indicated that Cu-PVP(25) had a catalytic activity (56% of phenol conversion when initial Cu(II) catalytic content was 200 mg L(Reaction)(-1)) comparable to that of commercial catalysts (59% of phenol conversion). Finally, the balance between activity and copper leaching was better represented by Cu-PVP(25) due to the heterogeneous catalytic activity had 86% performance in the heterogeneous phase, and the rest on the homogeneous phase, while Cu-PVP(2) had 59% and CuO/gamma-Al(2)O(3) 68%.

Item Type:	Journal Article (Original Article)
ISSN:	0304-3894
ISBN:	18722052
Publisher:	Elsevier
Language:	English
Submitter:	Factscience Import
Date Deposited:	04 Oct 2013 15:03
Last Modified:	04 May 2014 23:19
Publisher DOI:	10.1016/j.jhazmat.2008.07.054
PubMed ID:	18722052
Web of Science ID:	000264160000043
URI:	https://boris.unibe.ch/id/eprint/27305 (FactScience: 105950)