Surface oxygen vacancy and oxygen permeation flux limits of perovskite ion transport membranes

2015 ◽  
Vol 489 ◽  
pp. 248-257 ◽  
Author(s):  
Anton Hunt ◽  
Georgios Dimitrakopoulos ◽  
Ahmed F. Ghoniem
Keyword(s):  
Oxygen Vacancy ◽  
Ion Transport ◽  
Oxygen Permeation ◽  
Permeation Flux ◽  
Surface Oxygen ◽  
Surface Oxygen Vacancy ◽  
Ion Transport Membranes ◽  
Oxygen Permeation Flux

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.

Surface oxygen vacancy engineering and physical protection by in-situ carbon coating process of lithium rich layered oxide

2021 ◽  
Vol 515 ◽  
pp. 230623
Author(s):  
Vasu Shanmugam ◽  
Sasikala Natarajan ◽  
Laurel Simon Lobo ◽  
Ankita Mathur ◽  
Moodakare B. Sahana ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Carbon Coating ◽  
Coating Process ◽  
Surface Oxygen ◽  
Physical Protection ◽  
Layered Oxide ◽  
Surface Oxygen Vacancy

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

scholarly journals Surface Oxygen Vacancy Formation Energy Calculations in 34 Orientations of β-Ga2O3 and θ-Al2O3

2020 ◽  
Vol 124 (19) ◽  
pp. 10509-10522 ◽  
Author(s):  
Yoyo Hinuma ◽  
Takashi Kamachi ◽  
Nobutsugu Hamamoto ◽  
Motoshi Takao ◽  
Takashi Toyao ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Formation Energy ◽  
Vacancy Formation Energy ◽  
Vacancy Formation ◽  
Surface Oxygen ◽  
Energy Calculations ◽  
Surface Oxygen Vacancy ◽  
Oxygen Vacancy Formation
Sign in / Sign up

Export Citation Format

Share Document