Numerical Investigation of Oxygen Permeation Through a Ba0.5Sr0.5Co0.8Fe0.2O3−δ Ion Transport Membrane With Impingement Flow

2019 ◽  
Vol 142 (6) ◽  
Author(s):  
R. Ben-Mansour ◽  
Mohamed Hamdy ◽  
Y. Sanusi ◽  
A. Araoye ◽  
M. A. Habib ◽  
...  
Keyword(s):  
Ion Transport ◽  
Flow Rate ◽  
Clean Energy ◽  
Oxygen Permeation ◽  
Permeation Flux ◽  
Energy Applications ◽  
Ion Transport Membrane ◽  
Oxygen Permeation Flux ◽  
Flow Configurations ◽  
Sweeping Gas

Abstract Ion transport membrane (ITM) is considered to be one of the promising techniques for the separation of oxygen from the air for clean energy applications. Studying flow configurations of gases around Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) membrane is presented and discussed in this paper. The effects of the sweep mass flow rate and impingement configurations for the gases flow in the feed and permeation sides have been investigated. In this regard, flow with single or double impingement and impingement with different angles have been simulated and analyzed in order to identify the configurations that would provide the maximum permeation flux. Results show that increasing the sweep flow rate, directly, increases the oxygen permeation flux. It is also found that, in case of single impingement, decreasing the distance between the nozzle and the membrane (H), directly, increases the oxygen permeation flux for constant sweep side nozzle (slot) width (D). The permeation flux increases from around 2.9–3.66 µmole/cm2 s for the ratio H:D from1:1 to 1:4 (i.e., decreasing H to one-fourth of its value). Results show that the double impingement flow gives lower results than the single impingements by about 35.7%. The results also revealed that the optimum configuration is the parallel flow with vacuum in the sweeping side, which gives the highest permeation flux with an increase of more than 41% from that of the parallel configuration with a sweeping gas. Using carbon dioxide as a sweeping gas is better than helium.

Catalytic Partial Oxidation of Coke Oven Gas to Syngas over Ni/SiO2 Catalyst Modified by Rare Earth Metal Oxide in a Membrane Reactor

2010 ◽  
Vol 156-157 ◽  
pp. 1024-1028
Author(s):  
Da Hai Hu ◽  
Xiong Gang Lu ◽  
Hong Wei Cheng ◽  
Wei Zhong Ding
Keyword(s):  
Rare Earth ◽  
Partial Oxidation ◽  
Membrane Reactor ◽  
Coke Oven ◽  
Oxygen Permeation ◽  
Catalytic Partial Oxidation ◽  
Permeation Flux ◽  
Coke Oven Gas ◽  
Permeable Membrane ◽  
Oxygen Permeation Flux

The performance of Ni/SiO2 Catalysts modified by La2O3, ZrO2 and CeO2 were tested in a BaCo0.7Fe0.2Nb0.1O3-δ (BCFNO) membrane reactor by catalytic partial oxidation of coke oven gas (COG) under atmospheric pressure. The results show that the oxygen permeation flux increased dramatically with Ni/RxOy/SiO2 (R = La, Zr or Ce) catalysts by adding the element of rare earth especially the La during the reforming reaction. At optimized reaction conditions, the dense oxygen permeable membrane had an oxygen permeation flux around 16.4 ml/cm2•min and a CH4 conversion of 99.2% have been achieved at 900 oC.

scholarly journals Ultrahigh oxygen permeation flux through supported Ba0.5Sr0.5Co0.8Fe0.2O3−δ membranes

2011 ◽  
Vol 377 (1-2) ◽  
pp. 198-205 ◽  
Author(s):  
S. Baumann ◽  
J.M. Serra ◽  
M.P. Lobera ◽  
S. Escolástico ◽  
F. Schulze-Küppers ◽  
...  
Keyword(s):  
Oxygen Permeation ◽  
Permeation Flux ◽  
Oxygen Permeation Flux

Modeling of oxygen permeation through a LSCF ion transport membrane

2013 ◽  
Vol 76 ◽  
pp. 1-10 ◽  
Author(s):  
M.A. Habib ◽  
R. Ben Mansour ◽  
M.A. Nemit-allah
Keyword(s):  
Ion Transport ◽  
Oxygen Permeation ◽  
Ion Transport Membrane

Improving Performance of BaCo0.7Fe0.2Nb0.1O3-δ Ceramic Membrane by a Surface-Coating Layer for Partial Oxidation of Coke Oven Gas

2010 ◽  
Vol 154-155 ◽  
pp. 877-881 ◽  
Author(s):  
Hong Wei Cheng ◽  
Xiong Gang Lu ◽  
Da Hai Hu ◽  
Yu Wen Zhang ◽  
Wei Zhong Ding ◽  
...  
Keyword(s):  
Partial Oxidation ◽  
Surface Coating ◽  
Ceramic Membrane ◽  
Coating Layer ◽  
Coke Oven ◽  
Oxygen Permeation ◽  
Permeation Flux ◽  
Coke Oven Gas ◽  
Oxygen Permeation Flux ◽  
Partial Oxidation Reforming

The BaCo0.7Fe0.2Nb0.1O3-δ (BCFNO) membranes combined with Ce0.8Re0.2O2-δ (Re=La, Y) layer on the permeation side were used for hydrogen production by partial oxidation reforming of coke oven gas (COG). The Ce0.8Re0.2O2-δ improved the oxygen permeation flux of the membrane by 11–28% at 750 oC. The high oxygen permeation flux achieved using the Ce0.8Re0.2O2-δ surface-coating layer in this work are quite encouraging with a maximum value reaching 19.7 ml/cm2•min at 900 oC, which will be promising surface modification materials in the catalytic partial oxidation reforming of COG.

Mixed conducting membranes - Macrostructure related oxygen permeation flux

AIChE Journal ◽  
2010 ◽  
Vol 56 (12) ◽  
pp. 3084-3090 ◽  
Author(s):  
Barbara Zydorczak ◽  
Kang Li ◽  
Xiaoyao Tan
Keyword(s):  
Oxygen Permeation ◽  
Permeation Flux ◽  
Oxygen Permeation Flux ◽  
Conducting Membranes

Hydrogen Production from Methane by Using Composite-Type Oxygen Permeable Membranes

2005 ◽  
Vol 885 ◽  
Author(s):  
Hitoshi Takamura ◽  
Masayuki Ogawa ◽  
Yusuke Aizumi ◽  
Atsunori Kamegawa ◽  
Masuo Okada
Keyword(s):  
Stainless Steel ◽  
Thermal Expansion ◽  
Oxygen Permeation ◽  
Methane Reforming ◽  
Permeation Flux ◽  
Permeable Membrane ◽  
Composite Type ◽  
Oxygen Permeation Flux ◽  
Tape Cast ◽  
Reforming Reactions

ABSTRACTThis paper describes preparation and methane reforming characteristics of a proto-type reformer based on a composite-type oxygen permeable membrane. The tape-cast membrane of Sm-doped CeO2 and 15 vol% MnFe2O4 composite was combined with ferric stainless steel separator with a same thermal expansion coefficient. For the reformer module, high CH4 conversion, CO and H2 selectivity of 96%, 84% and 89% were achieved, respectively. Based on C, H and O balances, oxygen permeation flux was found to be 5.7 mu-mol/cm2s. Joule heat caused by the oxygen permeation was estimated to be approximately 17.5 W, and this covered most part of heat required for reforming reactions.

scholarly journals Preparation and Oxygen Permeability of BaCo0.7Fe0.2Nb0.1O3-δMembrane Modified by Ce0.8Y0.2O2-δPorous Layer on the Air Side

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Yuan Qiang ◽  
Zhen Qiang ◽  
Li Rong
Keyword(s):  
Porous Layer ◽  
Oxygen Permeability ◽  
Ceramic Membrane ◽  
Coke Oven ◽  
Xrd Analysis ◽  
Oxygen Permeation ◽  
Permeation Flux ◽  
Coke Oven Gas ◽  
Dense Ceramic ◽  
Oxygen Permeation Flux

BaCo0.7Fe0.2Nb0.1O3−δ(BCFN) dense ceramic membrane with submicron-Ce0.8Y0.2O2−δ(YDC) porous layer was investigated by the partial oxidation of coke oven gas (COG) in hydrogen production. XRD analysis showed this composite had good stability and no chemical reaction at high temperature. SEM and TEM characterization further showed BCFN membrane was uniformly modified by YDC porous layer (about 5~6 μm thickness) formed by the accumulation of relative nanoparticles. At the respective COG flux and air flux of 108 mL/min and 173 mL/min, the oxygen permeation flux of BCFN modified by submicron-YDC porous layer reached 16.62 mL·min−1·cm−2, which was about 23.5% higher than that of pure BCFN membrane. Therefore, submicron-YDC porous layer obviously improved the oxygen permeation flux of BCFN membrane and its stability at 875°C.

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