@article{Delgado2012,
abstract = {A series of Ce-Zr mixed oxides with different composition have been characterized and used as catalysts in the catalytic wet oxidation (CWO) of phenol. The addition of Zr significantly enhanced the redox and catalytic activity of ceria. However, a catalytic activity drop occurred for zirconium contents higher than 80%, which is related with a ZrO 2 segregation observed in Zr-rich oxides. The effects of the temperature of reaction, the oxygen partial pressure and the phenol/catalyst ratio on the activity for the oxidation of phenol and the selectivity to CO 2 were also investigated. The values for CO 2 selectivities were greatly influenced by the formation of a carbonaceous deposit adsorbed on the catalyst surface. The results indicated that these C-deposits can be totally oxidized by selecting appropriate operating conditions, thus obtaining catalytic systems with a very promising performance for phenol abatement. A mechanism is proposed to interpret the role of the carbonaceous deposits in the oxidation of phenol as a function of the reaction conditions. © 2011 Elsevier B.V.},
address = {Departamento de Ciencia de Los Materiales e Ingenieria Metalurgica y Quimica Inorganica, Facultad de Ciencias, Universidad de C\'{a}diz, E-11510 Puerto Real (C\'{a}diz), Spain},
annote = {Cited By (since 1996): 1

        
Export Date: 15 January 2013

        
Source: Scopus

        
CODEN: CATTE

        
doi: 10.1016/j.cattod.2011.03.069

        
Language of Original Document: English

        
Correspondence Address: Cauqui, M.A.; Departamento de Ciencia de Los Materiales e Ingenieria Metalurgica y Quimica Inorganica, Facultad de Ciencias, Universidad de C\'{a}diz, E-11510 Puerto Real (C\'{a}diz), Spain; email: miguelangel.cauqui@uca.es

        
References: Luck, F., (1999) Catal. Today, 53, p. 81; 
Levec, J., Pintar, A., (2007) Catal. Today, 124 (34), p. 172; 
Mishra, V.S., Mahajani, V.V., Joshi, J.B., (1995) Ind. Eng. Chem. Res., 34, p. 2; 
Santos, A., Yustos, P., Quintanilla, A., Garc\'{\i}a Ochoa, F., Casas, J.A., Rodrigues, J.J., (2004) Environ. Sci. Technol., 38, p. 133; 
PAT report: Wet air oxidation comes of age (1975) Environ. Sci. Technol., 9 (4), p. 300; 
Imamura, S., (1999) Ind. Eng. Chem. Res., 38, p. 1743; 
Hu, X., Lei, L., Chen, G., Yue, P.L., (2001) Water Res., 35 (8), p. 2078; 
Lin, S.H., Ho, S.J., (1997) J. Environ. Eng., 123, p. 852; 
Trovarelli, A., (2002) Catalysis by Ceria and Related Materials, , World Scientific - Imperial College Press London; 
Imamura, S., Trovarelli, A., (2002) Catalysis by Ceria and Related Materials, 14, p. 431. , Imperial College Press; 
Chen, H., Sayari, A., Adnot, A., Larachi, F., (2001) Appl. Catal. B, 32, p. 195; 
Hussain, S.T., Sayari, A., Larachi, F., (2001) Appl. Catal. B, 34, p. 1; 
Delgado, J.J., Prez-Omil, J.A., Rodr\o guez-Izquierdo, J.M., Cauqui, M.A., (2006) Catal. Commun., 7 (9), p. 639; 
Bedrane, S., Descorme, C., Duprez, D., (2002) Catal. Today, 75, p. 401; 
Hernandez, J.C., Hungria, A.B., Perez-Omil, J.A., Trasobares, S., Bernal, S., Midgley, P.A., Alavi, A., Calvino, J.J., (2007) J. Phys. Chem. C, 111 (26), p. 9001; 
(1991) Adsorption, Surface Area and Porosity, , Academic Press London; 
Vidal, H., Kaspar, J., Pijolat, M., Colon, G., Bernal, S., Cordn, A., Perrichon, V., Fally, F., (2000) Appl. Catal. B: Environ., 27 (1), p. 49; 
Yashima, M., Arashi, H., Kakihana, M., Yoshimura, M., (1994) J. Am. Ceram. Soc., 77 (4), p. 1067; 
Kaspar, J., Fornasiero, P., Graziani, M., (1999) Catal. Today, 50 (2), p. 285; 
Yao, H.C., Yao, Y.F.Y., (1984) J. Catal., 86 (2), p. 254; 
Trovarelli, A., Zamar, F., Llorca, J., Leitenburg, C., Dolcetti, G., Kiss, J.T., (1997) J. Catal., 169, p. 490; 
Balducci, G., Kaspar, J., Fornasiero, P., Graziani, M., Islam, M.S., Gale, J.D., (1997) J. Phys. Chem. B, 101 (10), p. 1750; 
Fornasiero, P., Di Monte, R., Ranga Rao, G., Kaspar, J., Meriani, S., Trovarelli, A., Graziani, M., (1995) J. Catal., 151 (1), p. 168; },
author = {Delgado, J J and Chen, X and P\'{e}rez-Omil, J A and Rodr\'{\i}guez-Izquierdo, J M and Cauqui, M A},
issn = {09205861 (ISSN)},
journal = {Catalysis Today},
keywords = {Carbon dioxide,Carbonaceous deposit,Carbonaceous deposits,Catalyst activity,Catalyst deactivation,Catalyst selectivity,Catalyst surfaces,Catalytic oxidation,Catalytic system,Catalytic wet oxidation,Ce-Zr mixed oxides,Ce-Zr oxides,Cerium compounds,Deactivation,Deposits,Operating condition,Oxidation,Oxidation of phenol,Oxygen partial pressure,Phenol,Phenol abatement,Phenols,Reaction conditions,TEM,Transmission electron microscopy,Zirconium,Zirconium content},
number = {1},
pages = {25--33},
title = {{The effect of reaction conditions on the apparent deactivation of Ce-Zr mixed oxides for the catalytic wet oxidation of phenol}},
url = {https://www.scopus.com/inward/record.url?eid=2-s2.0-84655167938&partnerID=40&md5=bb1985457f694eda8bd1f0c951c6480e},
volume = {180},
year = {2012}
}

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However, a catalytic activity drop occurred for zirconium contents higher than 80%, which is related with a ZrO 2 segregation observed in Zr-rich oxides. The effects of the temperature of reaction, the oxygen partial pressure and the phenol/catalyst ratio on the activity for the oxidation of phenol and the selectivity to CO 2 were also investigated. The values for CO 2 selectivities were greatly influenced by the formation of a carbonaceous deposit adsorbed on the catalyst surface. The results indicated that these C-deposits can be totally oxidized by selecting appropriate operating conditions, thus obtaining catalytic systems with a very promising performance for phenol abatement. A mechanism is proposed to interpret the role of the carbonaceous deposits in the oxidation of phenol as a function of the reaction conditions. © 2011 Elsevier B.V.","address":"Departamento de Ciencia de Los Materiales e Ingenieria Metalurgica y Quimica Inorganica, Facultad de Ciencias, Universidad de Cádiz, E-11510 Puerto Real (Cádiz), Spain","annote":"Cited By (since 1996): 1 Export Date: 15 January 2013 Source: Scopus CODEN: CATTE doi: 10.1016/j.cattod.2011.03.069 Language of Original Document: English Correspondence Address: Cauqui, M.A.; Departamento de Ciencia de Los Materiales e Ingenieria Metalurgica y Quimica Inorganica, Facultad de Ciencias, Universidad de Cádiz, E-11510 Puerto Real (Cádiz), Spain; email: miguelangel.cauqui@uca.es References: Luck, F., (1999) Catal. Today, 53, p. 81; Levec, J., Pintar, A., (2007) Catal. Today, 124 (34), p. 172; Mishra, V.S., Mahajani, V.V., Joshi, J.B., (1995) Ind. Eng. Chem. Res., 34, p. 2; Santos, A., Yustos, P., Quintanilla, A., García Ochoa, F., Casas, J.A., Rodrigues, J.J., (2004) Environ. Sci. Technol., 38, p. 133; PAT report: Wet air oxidation comes of age (1975) Environ. Sci. Technol., 9 (4), p. 300; Imamura, S., (1999) Ind. Eng. Chem. Res., 38, p. 1743; Hu, X., Lei, L., Chen, G., Yue, P.L., (2001) Water Res., 35 (8), p. 2078; Lin, S.H., Ho, S.J., (1997) J. Environ. Eng., 123, p. 852; Trovarelli, A., (2002) Catalysis by Ceria and Related Materials, , World Scientific - Imperial College Press London; Imamura, S., Trovarelli, A., (2002) Catalysis by Ceria and Related Materials, 14, p. 431. , Imperial College Press; Chen, H., Sayari, A., Adnot, A., Larachi, F., (2001) Appl. Catal. B, 32, p. 195; Hussain, S.T., Sayari, A., Larachi, F., (2001) Appl. Catal. B, 34, p. 1; Delgado, J.J., Prez-Omil, J.A., Rodrøguez-Izquierdo, J.M., Cauqui, M.A., (2006) Catal. Commun., 7 (9), p. 639; Bedrane, S., Descorme, C., Duprez, D., (2002) Catal. Today, 75, p. 401; Hernandez, J.C., Hungria, A.B., Perez-Omil, J.A., Trasobares, S., Bernal, S., Midgley, P.A., Alavi, A., Calvino, J.J., (2007) J. Phys. Chem. C, 111 (26), p. 9001; (1991) Adsorption, Surface Area and Porosity, , Academic Press London; Vidal, H., Kaspar, J., Pijolat, M., Colon, G., Bernal, S., Cordn, A., Perrichon, V., Fally, F., (2000) Appl. Catal. B: Environ., 27 (1), p. 49; Yashima, M., Arashi, H., Kakihana, M., Yoshimura, M., (1994) J. Am. Ceram. Soc., 77 (4), p. 1067; Kaspar, J., Fornasiero, P., Graziani, M., (1999) Catal. Today, 50 (2), p. 285; Yao, H.C., Yao, Y.F.Y., (1984) J. Catal., 86 (2), p. 254; Trovarelli, A., Zamar, F., Llorca, J., Leitenburg, C., Dolcetti, G., Kiss, J.T., (1997) J. Catal., 169, p. 490; Balducci, G., Kaspar, J., Fornasiero, P., Graziani, M., Islam, M.S., Gale, J.D., (1997) J. Phys. Chem. B, 101 (10), p. 1750; Fornasiero, P., Di Monte, R., Ranga Rao, G., Kaspar, J., Meriani, S., Trovarelli, A., Graziani, M., (1995) J. Catal., 151 (1), p. 168; ","author":[{"propositions":[],"lastnames":["Delgado"],"firstnames":["J","J"],"suffixes":[]},{"propositions":[],"lastnames":["Chen"],"firstnames":["X"],"suffixes":[]},{"propositions":[],"lastnames":["Pérez-Omil"],"firstnames":["J","A"],"suffixes":[]},{"propositions":[],"lastnames":["Rodríguez-Izquierdo"],"firstnames":["J","M"],"suffixes":[]},{"propositions":[],"lastnames":["Cauqui"],"firstnames":["M","A"],"suffixes":[]}],"issn":"09205861 (ISSN)","journal":"Catalysis Today","keywords":"Carbon dioxide,Carbonaceous deposit,Carbonaceous deposits,Catalyst activity,Catalyst deactivation,Catalyst selectivity,Catalyst surfaces,Catalytic oxidation,Catalytic system,Catalytic wet oxidation,Ce-Zr mixed oxides,Ce-Zr oxides,Cerium compounds,Deactivation,Deposits,Operating condition,Oxidation,Oxidation of phenol,Oxygen partial pressure,Phenol,Phenol abatement,Phenols,Reaction conditions,TEM,Transmission electron microscopy,Zirconium,Zirconium content","number":"1","pages":"25–33","title":"The effect of reaction conditions on the apparent deactivation of Ce-Zr mixed oxides for the catalytic wet oxidation of phenol","url":"https://www.scopus.com/inward/record.url?eid=2-s2.0-84655167938&partnerID=40&md5=bb1985457f694eda8bd1f0c951c6480e","volume":"180","year":"2012","bibtex":"@article{Delgado2012,\nabstract = {A series of Ce-Zr mixed oxides with different composition have been characterized and used as catalysts in the catalytic wet oxidation (CWO) of phenol. The addition of Zr significantly enhanced the redox and catalytic activity of ceria. However, a catalytic activity drop occurred for zirconium contents higher than 80%, which is related with a ZrO 2 segregation observed in Zr-rich oxides. The effects of the temperature of reaction, the oxygen partial pressure and the phenol/catalyst ratio on the activity for the oxidation of phenol and the selectivity to CO 2 were also investigated. The values for CO 2 selectivities were greatly influenced by the formation of a carbonaceous deposit adsorbed on the catalyst surface. The results indicated that these C-deposits can be totally oxidized by selecting appropriate operating conditions, thus obtaining catalytic systems with a very promising performance for phenol abatement. A mechanism is proposed to interpret the role of the carbonaceous deposits in the oxidation of phenol as a function of the reaction conditions. © 2011 Elsevier B.V.},\naddress = {Departamento de Ciencia de Los Materiales e Ingenieria Metalurgica y Quimica Inorganica, Facultad de Ciencias, Universidad de C\\'{a}diz, E-11510 Puerto Real (C\\'{a}diz), Spain},\nannote = {Cited By (since 1996): 1\n\n \nExport Date: 15 January 2013\n\n \nSource: Scopus\n\n \nCODEN: CATTE\n\n \ndoi: 10.1016/j.cattod.2011.03.069\n\n \nLanguage of Original Document: English\n\n \nCorrespondence Address: Cauqui, M.A.; Departamento de Ciencia de Los Materiales e Ingenieria Metalurgica y Quimica Inorganica, Facultad de Ciencias, Universidad de C\\'{a}diz, E-11510 Puerto Real (C\\'{a}diz), Spain; email: miguelangel.cauqui@uca.es\n\n \nReferences: Luck, F., (1999) Catal. Today, 53, p. 81; \nLevec, J., Pintar, A., (2007) Catal. Today, 124 (34), p. 172; \nMishra, V.S., Mahajani, V.V., Joshi, J.B., (1995) Ind. Eng. Chem. Res., 34, p. 2; \nSantos, A., Yustos, P., Quintanilla, A., Garc\\'{\\i}a Ochoa, F., Casas, J.A., Rodrigues, J.J., (2004) Environ. Sci. Technol., 38, p. 133; \nPAT report: Wet air oxidation comes of age (1975) Environ. Sci. Technol., 9 (4), p. 300; \nImamura, S., (1999) Ind. Eng. Chem. Res., 38, p. 1743; \nHu, X., Lei, L., Chen, G., Yue, P.L., (2001) Water Res., 35 (8), p. 2078; \nLin, S.H., Ho, S.J., (1997) J. Environ. Eng., 123, p. 852; \nTrovarelli, A., (2002) Catalysis by Ceria and Related Materials, , World Scientific - Imperial College Press London; \nImamura, S., Trovarelli, A., (2002) Catalysis by Ceria and Related Materials, 14, p. 431. , Imperial College Press; \nChen, H., Sayari, A., Adnot, A., Larachi, F., (2001) Appl. Catal. B, 32, p. 195; \nHussain, S.T., Sayari, A., Larachi, F., (2001) Appl. Catal. B, 34, p. 1; \nDelgado, J.J., Prez-Omil, J.A., Rodr\\o guez-Izquierdo, J.M., Cauqui, M.A., (2006) Catal. Commun., 7 (9), p. 639; \nBedrane, S., Descorme, C., Duprez, D., (2002) Catal. Today, 75, p. 401; \nHernandez, J.C., Hungria, A.B., Perez-Omil, J.A., Trasobares, S., Bernal, S., Midgley, P.A., Alavi, A., Calvino, J.J., (2007) J. Phys. Chem. C, 111 (26), p. 9001; \n(1991) Adsorption, Surface Area and Porosity, , Academic Press London; \nVidal, H., Kaspar, J., Pijolat, M., Colon, G., Bernal, S., Cordn, A., Perrichon, V., Fally, F., (2000) Appl. Catal. B: Environ., 27 (1), p. 49; \nYashima, M., Arashi, H., Kakihana, M., Yoshimura, M., (1994) J. Am. Ceram. Soc., 77 (4), p. 1067; \nKaspar, J., Fornasiero, P., Graziani, M., (1999) Catal. Today, 50 (2), p. 285; \nYao, H.C., Yao, Y.F.Y., (1984) J. Catal., 86 (2), p. 254; \nTrovarelli, A., Zamar, F., Llorca, J., Leitenburg, C., Dolcetti, G., Kiss, J.T., (1997) J. Catal., 169, p. 490; \nBalducci, G., Kaspar, J., Fornasiero, P., Graziani, M., Islam, M.S., Gale, J.D., (1997) J. Phys. Chem. B, 101 (10), p. 1750; \nFornasiero, P., Di Monte, R., Ranga Rao, G., Kaspar, J., Meriani, S., Trovarelli, A., Graziani, M., (1995) J. 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