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Optimization of the MnCeOx system for the catalytic wet oxidation of phenol with oxygen (CWAO) (Articolo in rivista)
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- Optimization of the MnCeOx system for the catalytic wet oxidation of phenol with oxygen (CWAO) (Articolo in rivista) (literal)
- Anno
- 2008-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.apcatb.2008.06.020 (literal)
- Alternative label
Francesco Arena; Giuseppe Trunfio; Jacopo Negro; Lorenzo Spadaro (2008)
Optimization of the MnCeOx system for the catalytic wet oxidation of phenol with oxygen (CWAO)
in Applied catalysis. B, Environmental (Print); ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, AMSTERDAM (Paesi Bassi)
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- Francesco Arena; Giuseppe Trunfio; Jacopo Negro; Lorenzo Spadaro (literal)
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- Dipartimento di Chimica Industriale e Ingegneria dei Materiali, Universita` degli Studi di Messina, Salita Sperone 31 c.p. 29, I-98166 S. Agata (Messina), Italy
Istituto CNR-ITAE ''Nicola Giordano'', Salita S. Lucia 5, I-98126 S. Lucia (Messina), Italy (literal)
- Titolo
- Optimization of the MnCeOx system for the catalytic wet oxidation of phenol with oxygen (CWAO) (literal)
- Abstract
- A class of MnCeC(x) catalysts has been synthesized via the new redox-precipitation route in alternative to the conventional co-precipitation technique. The effects of preparation method, composition and calcination temperature on catalyst texture, dispersion and reduction pattern properties have been addressed. Redox-precipitated systems exhibit high surface area (SA, 120-170 m(2)/g), large pore volume (PV, 0.4-0.5 cm(3)/g) and a \"narrow\" pore size distribution (PSD) in a wide range of the Mn/Ce ratio (1/3-3/1). A quasi-molecular dispersion markedly improves oxide-support interactions and reducibility of the active phase. Redox-precipitated systems show a superior performance in the catalytic wet oxidation of phenol with oxygen (CWAO) at 373 K in terms of substrate and total organic carbon (TOC) elimination and mineralization (i.e., CO(2) formation) selectivity. Carbon mass-balance from TG-DSC data of used catalysts and CO(2) selectivity values signal that the CWAO of phenol proceeds via a L-H reaction path, the oxidation of C-containing species being the rate limiting step (r.l.s.). Then, an optimum average pore diameter (APD. 10-15 nm) enhances the rate of the adsorption step, while a straight relation between CO(2) selectivity and reducibility prove that dispersion and redox properties of the active phase control the mineralization activity of the MnCeCx system (literal)
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