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Lookup NU author(s): Dr Kui Zhang
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
© 2021 Elsevier BV. Ceramic oxygen permeable membranes (OPMs) are widely considered the “next generation” technology for pure oxygen separation and catalytic membrane reactors. However, the main issue of OPM is high operating temperature (above 800 °C) and resulting implications for materials, cost, as well as operating complexities (e.g., sealing, creep deformation, and thermal shock during thermal cycling). A new design for coupling OPM La0.6Sr0.4Co0.2Fe0.8O3-δ with a dielectric barrier discharge plasma (a type of atmospheric pressure non-thermal plasma) is proposed for highly efficient low-temperature (600 °C) oxygen permeation. This study demonstrates that the plasma can activate the surface exchange reactions. Applying 15 W air-plasma can effectively reduce the apparent activation energy of the permeation process from 136.6 to 43.1 kJ mol−1. The oxygen flux is increased by a factor of nearly 30 at 600 °C with a plasma power of 15 W. The newly developed plasma-membrane micro-reactor design enables further performance enhancement at lower operating temperatures and integration with solid oxide fuel cells, catalytic membrane reactors, and oxygen permeable membranes.
Author(s): Zheng Q, Xie Y, Tan J, Xu Z, Luo P, Wang T, Liu Z, Liu F, Zhang K, Fang Z, Zhang G, Jin W
Publication type: Article
Publication status: Published
Journal: Journal of Membrane Science
Print publication date: 01/01/2022
Online publication date: 23/09/2021
Acceptance date: 18/09/2021
Date deposited: 30/11/2021
ISSN (print): 0376-7388
ISSN (electronic): 1873-3123
Publisher: Elsevier BV
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