Two-phase hydrodynamic modelling and experimental characterization in an activated sludge electrooxidation flow reactor
Por:
Barrios, J. A., Solis-Caballero, F. E., Cano, A., Duran, U., Orozco, G., Rivera, F. F.
Publicada:
1 ene 2019
Resumen:
Over the last decade, electrochemical processes involving solid–liquid hydrodynamic systems have been proposed for their tentative implementation in applications like water activated sludge electrooxidation as a pre-treatment for anaerobic digestion to produce biogas, mostly methane. However, electrooxidation needs to be optimized in terms of operating conditions, including improving operational flow. This work therefore, focuses on two-phase fluid dynamics and mass transport modeling of a Diaclean® cell, to establish a technical understanding of the electrochemical reactor behavior under two-phase hydrodynamics and improve operational conditions when solid–liquid systems are involved. Modelling was performed for two scenarios: (a) a single-phase flow to evaluate a solution without any solid particles using Navier–Stokes equations, and (b) a two-phase flow to analyze sludge using a Eulerian mixture model approach. These analyses of the proposed scenarios were validated with a simultaneous experimental study consisting of hydrodynamic studies (using mean residence time distributions tests) and mass transport characterization (by limiting electrochemical current techniques). The theoretical analysis presented here fits the experimental data obtained from residence time distribution and mass transport analysis at low Reynolds numbers quite well, but presents slight discrepancies at intermediate Re, in one and two-phase systems. This suggests refinement of the analyses is needed to consider some complex effects. © 2018 Institution of Chemical Engineers
Filiaciones:
Barrios, J. A.:
Instituto de Ingeniería, UNAM, P.O. Box 70-186, México, D.F., 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Ingn, POB 70-186, Mexico City 04510, DF, Mexico
Solis-Caballero, F. E.:
Instituto de Ingeniería, UNAM, P.O. Box 70-186, México, D.F., 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Ingn, POB 70-186, Mexico City 04510, DF, Mexico
Cano, A.:
Tecnologico de Monterrey, Escuela de Ingeniería y Ciencias, Ave. Eugenio Garza Sada 2501, Monterrey, N.L. 64849, Mexico
Tecnol Monterrey, Escuela Ingn & Ciencias, Ave Eugenio Garza Sada 2501, Monterrey 64849, NL, Mexico
Duran, U.:
Instituto de Ingeniería, UNAM, P.O. Box 70-186, México, D.F., 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Ingn, POB 70-186, Mexico City 04510, DF, Mexico
Orozco, G.:
Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Parque Tecnológico Querétaro s/n Sanfandila, Pedro Escobedo, Querétaro 76703, Mexico
Ctr Invest & Desarrollo Tecnol Electroquim, Parque Tecnol Queretaro S-N Sanfandila, Pedro Escobedo 76703, Queretaro, Mexico
Rivera, F. F.:
Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Parque Tecnológico Querétaro s/n Sanfandila, Pedro Escobedo, Querétaro 76703, Mexico
CONACYT — Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Parque Tecnológico Querétaro s/n Sanfandila, Pedro Escobedo, Querétaro 76703, Mexico
CONACYT, Ctr Invest & Desarrollo Tecnol Electroquim, Parque Tecnol Queretaro S-N Sanfandila, Pedro Escobedo 76703, Queretaro, Mexico
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