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Title:Alternative Recovery and Valorization of Metals from Exhausted Catalytic Converters in a New Smart Polymetallic Catalyst
Authors:ID Tieuli, Sebastiano, Università Ca’ Foscari Venezia (Author)
ID Baldi, Franco, Università Ca’ Foscari Venezia (Author)
ID Arčon, Iztok, UNG (Author)
ID Vogel-Mikuš, Katarina, Univerza v Ljubljani (Author)
ID Gallo, Michele, Università Ca’ Foscari Venezia (Author)
ID Sperni, Laura, Università Ca’ Foscari Venezia (Author)
ID Piccolo, Oreste, SCSOP, Italy (Author)
ID Paganelli, Stefano, Università Ca’ Foscari Venezia (Author)
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Work type:Not categorized
Typology: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:4, 15
PID:20.500.12556/RUNG-4488-4b94dd49-3133-a75f-55af-1bb0226f1cd1 New window
COBISS.SI-ID:5054287 New window
DOI:10.1002/slct.201803925 New window
Publication date in RUNG:06.05.2019
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Publisher:Wiley: 12 months
Year of publishing:2019