Navegar

Colección

Datos Estadísticas

Artículo

Ayude, A.; Cechini, J.; Cassanello, M.; Martínez, O.; Haure, P. "Trickle bed reactors: Effect of liquid flow modulation on catalytic activity" (2008) Chemical Engineering Science. 63(20):4969-4973
La versión final de este artículo es de uso interno. El editor solo permite incluir en el repositorio el artículo en su versión post-print. Por favor, si usted la posee enviela a
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

The effect of slow ON-OFF liquid flow modulation on the oxidation of aqueous solutions of ethanol using a 0.5% Pd / Al2 O3 commercial egg-shell catalyst was investigated in a laboratory trickle bed reactor (TBR). In this mode of operation, the catalyst was cyclically exposed to oxidative and reductive environments. The study was carried out under different gas and liquid flow rates, cycle periods and splits. Cycling results have been compared with the steady-state experiments performed at the corresponding average liquid flow rate. Significant improvements over the continuous operation were obtained when the catalyst was exposed to a short surplus of oxygen (to minimize deactivation by overoxidation in the kinetic regime) after a longer time of working in the mass transfer limited regime. According to the results presented here, it is recommended to work with high liquid flow rates and moderate gas flow rates to ensure complete wetting of the catalyst during the ON cycle and to minimize the overoxidation process during the OFF cycle. © 2008 Elsevier Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:Trickle bed reactors: Effect of liquid flow modulation on catalytic activity
Autor:Ayude, A.; Cechini, J.; Cassanello, M.; Martínez, O.; Haure, P.
Filiación:INTEMA, CONICET, UNMdP. J.B. Justo 4302, 7600 Mar del Plata, Argentina
PINMATE, Dep. Industrias, FCEyN, Int. Güiraldes 2620, C1428BGA Buenos Aires, Argentina
Dep. Ing. Química, FI-UNLP-CINDECA, Calle 47 No. 257, 1900 La Plata, Argentina
Palabras clave:Alcohol oxidation; Catalyst activation; Catalyst deactivation; Liquid flow modulation; Multiphase reactors; Stability; Chemical reactors; Ethanol; Palladium; Solutions; Alcohol oxidation; Aqueous solutions; Catalyst activation; Catalyst deactivation; Catalytic activities; Liquid flow modulation; Multiphase reactors; Stability; Trickle-bed reactors; Modulation
Año:2008
Volumen:63
Número:20
Página de inicio:4969
Página de fin:4973
DOI: http://dx.doi.org/10.1016/j.ces.2008.07.024
Título revista:Chemical Engineering Science
Título revista abreviado:Chem. Eng. Sci.
ISSN:00092509
CODEN:CESCA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00092509_v63_n20_p4969_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) Chemical Engineering Science, 60 (22), pp. 6262-6269
  • Castellari, A.T., Haure, P.M., Experimental study of the periodic operation of a trickle-bed reactor (1995) AlChE Journal, 41, pp. 1593-1597
  • 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) Chemical Engineering Science, 57, pp. 5051-5063
  • Gangwal, V.R., Van der Schaaf, J., Kuster, B.F., Schouten, J.C., Noble-metal-catalyzed aqueous alcohol oxidation: reaction start-up and catalyst deactivation and reactivation (2005) Journal of Catalysis, 232, pp. 432-443
  • Herzkowitz, M., Wetting efficiency in trickle-bed reactors: its effect on the reactor performance (1981) Chemical Engineering Journal, 22, pp. 167-175
  • Horányi, G., Heterogeneous catalysis and electrocatalysis (1994) Catalysis Today, 19, pp. 285-312
  • Keresszegi, C., Burgi, T., Mallat, T., Baiker, A., On the role of Oxygen in the liquid phase aerobic oxidation of alcohols on Palladium (2002) Journal of Catalysis, 211, pp. 244-251
  • Keresszegi, C., Ferri, D., Mallat, T., Baiker, A., Unraveling the surface reactions during liquid-phase oxidation of benzyl alcohol on Pd / Al2 O3: an in situ ATR-IR study (2005) Journal of Physical Chemistry 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) Catalysis Today, 57, pp. 143-155
  • Mallat, T., Baiker, A., Oxidation of alcohols with molecular oxygen on platinum metal catalysts in aqueous solutions (1994) Catalysis Today, 19, pp. 247-284
  • Mallat, T., Baiker, A., Oxidation of alcohols with molecular oxygen on solid catalysts (2004) Chemical Reviews, 104, pp. 3037-3058
  • Markusse, A.P., Kuster, B.F., Schouten, J.C., Platinum catalysed aqueous methyl α-D-glucopyranoside oxidation in a multiphase redox-cycle reactor (2001) Catalysis 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) Catalysis Today, 107-108, pp. 630-636
  • Muzen, A., Fraguío, M.S., Cassanello, M., Ayude, M.A., Haure, P., Martínez, O., Clean oxidation of alcohols in trickle-bed reactors with liquid flow modulation (2005) Industrial & Engineering Chemistry Research, 44, pp. 5275-5284
  • Pintar, A., Bercic, G., Levec, J., Catalytic liquid-phase oxidation of aqueous phenol solutions in a trickle-bed reactor (1997) Chemical Engineering Science, 52, p. 4143
  • Silveston, P.L., Hanika, J., Challenges for the periodic operation of trickle-bed catalytic reactors (2002) Chemical Engineering Science, 57, pp. 3373-3385

Citas:

---------- APA ----------
Ayude, A., Cechini, J., Cassanello, M., Martínez, O. & Haure, P. (2008) . Trickle bed reactors: Effect of liquid flow modulation on catalytic activity. Chemical Engineering Science, 63(20), 4969-4973.
http://dx.doi.org/10.1016/j.ces.2008.07.024
---------- CHICAGO ----------
Ayude, A., Cechini, J., Cassanello, M., Martínez, O., Haure, P. "Trickle bed reactors: Effect of liquid flow modulation on catalytic activity" . Chemical Engineering Science 63, no. 20 (2008) : 4969-4973.
http://dx.doi.org/10.1016/j.ces.2008.07.024
---------- MLA ----------
Ayude, A., Cechini, J., Cassanello, M., Martínez, O., Haure, P. "Trickle bed reactors: Effect of liquid flow modulation on catalytic activity" . Chemical Engineering Science, vol. 63, no. 20, 2008, pp. 4969-4973.
http://dx.doi.org/10.1016/j.ces.2008.07.024
---------- VANCOUVER ----------
Ayude, A., Cechini, J., Cassanello, M., Martínez, O., Haure, P. Trickle bed reactors: Effect of liquid flow modulation on catalytic activity. Chem. Eng. Sci. 2008;63(20):4969-4973.
http://dx.doi.org/10.1016/j.ces.2008.07.024