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

被引：9

作者：

Julian, I. ^{[1
]}

Herguido, J. ^{[1
]}

Menendez, M. ^{[1
]}

机构：

[1] Univ Zaragoza, Aragon Inst Engn Res I3A, Catalysis Mol Separat & Reactor Engn Grp CREG, Mariano Esquillor S-N, Zaragoza 50018, Spain

来源：

CHEMICAL ENGINEERING JOURNAL | 2016年 / 305卷

关键词：

Two-Fluid Model; Membrane reactor; Two-Zone Fluidized Bed Reactor; Fluid dynamics; Gas permeation; 2-FLUID MODEL; NUMERICAL-SIMULATION; BOUNDARY-CONDITIONS; METHANE; BUBBLE; DEHYDROGENATION; VALIDATION; FLOW;

D O I：

10.1016/j.cej.2015.08.127

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：201 / 211

页数：11

共 57 条

[31] COMPUTER-SIMULATION OF THE HYDRODYNAMICS OF A 2-DIMENSIONAL GAS-FLUIDIZED BED [J].