Gas permeation effect on the Two-Section Two-Zone Fluidized Bed Membrane Reactor (TS-TZFBMR) fluid dynamics: A CFD simulation study

Julián, I. ; Herguido, J. (Universidad de Zaragoza) ; Menéndez, M. (Universidad de Zaragoza)

Resumen: Two-Fluid Model simulations were conducted using the commercial software Ansys CFX and Fluent to study the effect of the gas extraction on the fluid dynamic behavior of a membrane-assisted Two-Section Two-Zone Fluidized Bed Membrane Reactor (TS-TZFBMR). Simulated bubble properties and bed dynamics were analyzed and compared among different membrane reactor configurations, including reactor-wall (RWM) and immersed tubular (ITM) membranes, for their future use in catalytic reactions, e.g., alkane dehydrogenation or methane steam reforming. According to the solids hold-up distribution at different fluidization regimes and permeation fluxes, the ITM configuration is the most suitable to enhance the gas-particle contact and to favor the solids axial mixing for in-situ catalyst regeneration purposes. However, the RWM configuration provides a greater permeation area for selective gas removal and is preferred to enhance purification. It was found that relative permeation fluxes above 20% of the total feed gas have a significant impact on the fluid dynamic regime within the TS-TZFBMR, concerning the appearance of local defluidized regions, gas channeling and solids axial mixing.

Idioma: Inglés

DOI: 10.1016/j.cej.2015.08.127

Año: 2016

Publicado en: Chemical Engineering Journal 301 (2016), 201-211
ISSN: 1385-8947

Factor impacto JCR: 6.216 (2016)

Categ. JCR: ENGINEERING, ENVIRONMENTAL rank: 3 / 49 = 0.061 (2016) - Q1 - T1
Categ. JCR: ENGINEERING, CHEMICAL rank: 6 / 135 = 0.044 (2016) - Q1 - T1

Factor impacto SCIMAGO: 1.758 - Chemical Engineering (miscellaneous) (Q1) - Industrial and Manufacturing Engineering (Q1) - Environmental Chemistry (Q1) - Chemistry (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/CTQ2010-15568
Financiación: info:eu-repo/grantAgreement/ES/MINECO/ENE2013-44350-R

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)