Abstract:
The effect of slow ON-OFF liquid flow modulation on the oxidation of aqueous solutions of ethanol using a 0.5% Pd/Al2O3 commercial egg-shell catalyst was investigated in a laboratory scale Trickle Bed Reactor (TBR). The behavior of noble metal catalysts used in alcohol oxidation strongly depends on the degree of exposure to oxygen. At low oxygen concentration, the reaction rate is low and the catalyst may deactivate by adsorption of carbonaceous deposits, while under rich oxygen concentration, the catalyst deactivates due to over-oxidation. So, ON-OFF modulation of the liquid flow was implemented with the aim of increasing the conversion and/or reaction rate. In this mode of operation, the catalyst was cyclically exposed to oxidative and reductive environments, therefore the TBR behaved as a redox cycle reactor. Experiments were conducted at different liquid flow rates, cycle periods and splits. Significant improvements over the steady state operation were obtained when the catalyst was exposed to a short surplus of oxygen after a longer time of working in the mass transfer limited regime. Proper selection of cycle duration and an adequate start-up protocol are crucial to maintain long term catalytic activity.
Registro:
| Documento: |
Conferencia
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| Título: | Effect of liquid flow modulation on the stability of noble metal catalysts for alcohol oxidation |
| Autor: | Ayude, M.A.; Cassanello, M.C.; Martínez, O.M.; Haure, P.M.; Atanor; Compania Mega S.A.; Consejo Federal de Inversiones (CFI); Dow; et al.; Petroquimica Rio Tercero SA (PRIII) |
| Filiación: | INTEMA, CONICET, UNMdP, Mar del Plata, Argentina
PINMATE, Dep. Industrias, FCEyN, UBA, Buenos Aires, Argentina
Dep. Ing. Qca., FI, UNLP, CINDECA, La Plata, Argentina
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| Palabras clave: | Over-oxidation; Periodic operation; Trickle bed reactors; Catalyst activity; Chemical reactors; Liquids; Mass transfer; Modulation; Oxidation; Oxygen; Palladium; Precious metals; Reaction rates; Redox reactions; Solutions; Carbonaceous deposits; Liquid flow modulation; Noble metal catalysts; Overoxidations; Oxygen concentrations; Periodic operation; Steady-state operation; Trickle bed reactor; Catalysts |
| Año: | 2006
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| Título revista: | 22nd Interamerican Congress of Chemical Engineering, CIIQ 2006 and 5th Argentinian Congress of Chemical Engineering, CAIQ 2006
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| Título revista abreviado: | Interam. Congr. Chem. Eng., CIIQ Argent. Congr. Chem. Eng., CAIQ. - Innov. Manag. Sustain. Dev.
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| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_NIS12854_v_n_p_Ayude |
Referencias:
- Ayude, M.A., Cassanello, M.C., Martínez, O.M., Haure, P.M., Phenomenological approach to interpret the effect of liquid flow modulation in trickle-bed reactors at the particle scale (2005) Chem. Eng. Sc., 60 (22), pp. 6262-6269
- Castellari, A.T., Haure, P.M., Experimental study of the periodic operation of a trickle bed reactor (1995) AIChE J, 41, pp. 1593-1597
- Gangwal, V.R., Van Der Schaaf, J., Kuster, B.F., Schouten, J.C., Noblemetal-catalysed aqueous alcohol oxidation: Reacton start-up and catalyst deactivation and reactivation (2005) J. of Catalysis, 232, pp. 432-443
- Gangwal, V.R., Van Wachem, B.G., Kuster, B.F., Schouten, J.C., Platinum catalysed aqueous alcohol oxidation: Model-based investigation of reaction conditions and catalyst design (2002) Chem. Eng. Sc, 57, pp. 5051-5063
- Herskowitz, M., Wetting efficiency in trickle-bed reactors: Its effect on the reactor performance (1981) Chem. Eng. J., 22, pp. 167-175
- Keresszegi, C., Ferri, D., Mallat, T., Baiker, A., Unraveling the surface reactions during liquid-phase oxidation of benzyl alcohol on Pd/Al2O3: An in situ ATR-IR study (2005) J. Phys. Chem. B., 109, pp. 958-967
- Kluytmans, J.H., Markusse, A.P., Kuster, B.F., Marin, G.B., Schouten, J.C., Engineering aspects of the aqueous noble metal catalysed alcohol oxidation (2000) Cat. Today, 57, pp. 143-155
- Mallat, T., Baiker, A., Oxidation of alcohols with molecular oxygen on solid catalysts (2004) Chem. Rev, 104, pp. 3037-3058
- Markusse, A.P., Kuster, B.F., Schouten, J.C., Platinum catalysed aqueous methyl a-D-glucopyranoside oxidation in a multiphase redox-cycle reactor (2001) Cat. Today, 66, pp. 191-197
- Massa, P.A., Ayude, M.A., Ivorra, F., Fenoglio, R., Haure, P., Phenol oxidation in a periodically operated trickle bed reactor (2005) Cat. Today, 107-108, pp. 630-636
- Muzen, A., Fraguio, S., Ayude, A., Haure, P., Martinez, O., Cassanello, M., Clean oxidation of alcohols in a trickle bed reactor with liquid flow modulation (2005) Ind. Eng. & Chem. Res, 44 (14), pp. 5275-5284A4 - Atanor; Compania Mega S.A.; Consejo Federal de Inversiones (CFI); Dow; et al.; Petroquimica Rio Tercero SA (PRIII)
Citas:
---------- APA ----------
Ayude, M.A., Cassanello, M.C., Martínez, O.M., Haure, P.M. & Atanor; Compania Mega S.A.; Consejo Federal de Inversiones (CFI); Dow; et al.; Petroquimica Rio Tercero SA (PRIII)
(2006)
. Effect of liquid flow modulation on the stability of noble metal catalysts for alcohol oxidation. 22nd Interamerican Congress of Chemical Engineering, CIIQ 2006 and 5th Argentinian Congress of Chemical Engineering, CAIQ 2006.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_NIS12854_v_n_p_Ayude [ ]
---------- CHICAGO ----------
Ayude, M.A., Cassanello, M.C., Martínez, O.M., Haure, P.M., Atanor; Compania Mega S.A.; Consejo Federal de Inversiones (CFI); Dow; et al.; Petroquimica Rio Tercero SA (PRIII)
"Effect of liquid flow modulation on the stability of noble metal catalysts for alcohol oxidation"
. 22nd Interamerican Congress of Chemical Engineering, CIIQ 2006 and 5th Argentinian Congress of Chemical Engineering, CAIQ 2006
(2006).
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_NIS12854_v_n_p_Ayude [ ]
---------- MLA ----------
Ayude, M.A., Cassanello, M.C., Martínez, O.M., Haure, P.M., Atanor; Compania Mega S.A.; Consejo Federal de Inversiones (CFI); Dow; et al.; Petroquimica Rio Tercero SA (PRIII)
"Effect of liquid flow modulation on the stability of noble metal catalysts for alcohol oxidation"
. 22nd Interamerican Congress of Chemical Engineering, CIIQ 2006 and 5th Argentinian Congress of Chemical Engineering, CAIQ 2006, 2006.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_NIS12854_v_n_p_Ayude [ ]
---------- VANCOUVER ----------
Ayude, M.A., Cassanello, M.C., Martínez, O.M., Haure, P.M., Atanor; Compania Mega S.A.; Consejo Federal de Inversiones (CFI); Dow; et al.; Petroquimica Rio Tercero SA (PRIII) Effect of liquid flow modulation on the stability of noble metal catalysts for alcohol oxidation. Interam. Congr. Chem. Eng., CIIQ Argent. Congr. Chem. Eng., CAIQ. - Innov. Manag. Sustain. Dev. 2006.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_NIS12854_v_n_p_Ayude [ ]
