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Title:Alternative Recovery and Valorization of Metals from Exhausted Catalytic Converters in a New Smart Polymetallic Catalyst
Authors:Tieuli, Sebastiano (Author)
Baldi, Franco (Author)
Arčon, Iztok (Author)
Vogel-Mikuš, Katarina (Author)
Gallo, Michele (Author)
Sperni, Laura (Author)
Piccolo, Oreste (Author)
Paganelli, Stefano (Author)
Files:This document has no files. This document may have a phisical copy in the library of the organization, check the status via COBISS. Link is opened in a new window
Language:English
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:A new metals-polymeric composite, Metx-EPS (I), was prepared to be used as catalyst in water or in two-phase aqueous conditions. The metals source was an exhausted catalytic converter that was grinded and treated with an acidic solution at room temperature. After filtration, the solution was concentrated, neutralized and added to a broth of Klebsiella oxytoca DSM 29614 to produce (I) where metals are embedded in a peculiar polysaccharide structure (EPS). The composite was easily recovered from the fermentation broth and purified. The process protocol was verified many times and was shown to be reproducible satisfactorily. The % recovery of metals, originally present in the converter, was good as determined by atomic absorption. The morphology and the chemical state of main metals in (I) were investigated by X-ray absorption spectroscopy methods (XANES and EXAFS). No metallic alloy seems to be evident. The catalytic activity and a possible synergic effect due to the presence of the different metals was valuated in the hydrogenation of some substrates, valuable precursors for theproduction of fine chemicals.
Keywords:Biogenerated polymetallic exopolysaccharide, biphasic catalysis, hydrogenation, metals-polymeric composite, new catalyst from metallic wastes, EXAFS, XANES
Year of publishing:2019
Number of pages:4624-4632
Numbering:15, 4
COBISS_ID:5054287 Link is opened in a new window
URN:URN:SI:UNG:REP:OVFAAV0F
DOI:10.1002/slct.201803925 Link is opened in a new window
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Record is a part of a journal

Title:ChemistrySelect
Publisher:Wiley: 12 months
ISSN:2365-6549
Year of publishing:2019

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