Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 454, Issue -, Pages 97-108Publisher
ELSEVIER
DOI: 10.1016/j.memsci.2013.11.038
Keywords
Perovskite membrane; Oxygen semi-permeation; Sol-gel; Ultra-divided coating; EISA process
Categories
Funding
- ADEME (French Environment and Energy Management Agency)
- Air Liquide Company
Ask authors/readers for more resources
La1-xSrxFe1-yGdyO3-delta perovskite membranes are promising candidates for catalytic membrane reactors applications due to their potential high oxygen semi-permeation fluxes and good chemical stability in working conditions. The oxygen flux through La1-xSrxFe1-yGdyO3-delta perovskite membranes is mainly governed by oxygen exchanges at the membrane surface. This work shows how to strongly increase such an oxygen flux while developing a dedicated ultra-divided surface coating. Such a coating is obtained by Following a route derived from sol-gel and allowing an elementary grain diameter control in the 5-10 nm range. In this way, the oxygen fluxes through the coated membrane can be increased of more than an order of magnitude in comparison to uncoated membranes. This paper clearly shows that the oxygen flux through the uncoated membrane is governed by oxygen surface exchange, while for coated membranes it is governed by a balance between surface exchange and bulk diffusion. Our surfacemodified dense La1-xSrxFe1-yGdyO3-delta membranes show good performance in long term in working conditions (high temperature and large oxygen partial pressure gradients). (C) 2013 Elsevier B.V. All rights reserved
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available