Imperial College London
Professor Kang Li

ProfessorKangLi

Faculty of Engineering, Department of Chemical Engineering

Professor in Chemical Engineering
 
 
 
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Contact

 

+44 (0)20 7594 5676kang.li

 
 
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Location

 

419ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Chi:2017:10.1016/j.memsci.2017.02.010,
author = {Chi, Y and Li, T and Wang, B and Wu, Z and Li, K},
doi = {10.1016/j.memsci.2017.02.010},
journal = {Journal of Membrane Science},
pages = {224--233},
title = {Morphology, performance and stability of multi-bore capillary La0.6Sr0.4Co0.2Fe0.8O3-δ oxygen transport membranes},
url = {http://dx.doi.org/10.1016/j.memsci.2017.02.010},
volume = {529},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Mixed ionic-electronic conducting 3, 4, 7-bore capillary membranes made of La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) were successfully prepared by the combined phase inversion/sintering technique. The membranes fabricated have asymmetric wall structures with micro-channels formed in between surfaces, and dense layers sandwiched in between the micro-channels. By changing the solvent from DMSO to NMP, changes in the morphology of the 7-bore membrane were observed, where the separation layer has reduced its effective thickness. The multi-bore membranes exhibited 3-point bending fracture loads of 10.4, 13.5, 15.4 and 11.7 Newton with a 3 cm testing span for the 3-bore , 4-bore, 7-bore-DMSO and 7-bore-NMP samples, respectively, which are much stronger than single-bore hollow fibre membranes. Oxygen permeation of the multi-bore membranes was measured with a sweep gas flow through lumen and the effect of operating temperature has  on the performance was studied between 750 °C to 1000 °C. Oxygen fluxes measured are comparable to typical sandwich-like structured single-bore hollow fibres at temperatures below  900 °C, but are notably higher at higher temperatures owe to their  thinner membrane walls. The 200-hour long-term permeation test conducted on the 7-bore membrane showed a slight increase in permeation flux, but the sign of kinetic demixing/decomposition appeared on the outer surface, where the surface of the thinnest membrane walls underwent faster demixing/decomposition than the thickest walls. In summary, the results demonstrated that multi-bore configurations can achieve optimised material distribution during the fabrication, and can obtain strong mechanical property, high permeation flux for the final products whilst maintaining high membrane area to volume ratios.
AU  - Chi,Y
AU  - Li,T
AU  - Wang,B
AU  - Wu,Z
AU  - Li,K
DO  - 10.1016/j.memsci.2017.02.010
EP  - 233
PY  - 2017///
SN  - 0376-7388
SP  - 224
TI  - Morphology, performance and stability of multi-bore capillary La0.6Sr0.4Co0.2Fe0.8O3-δ oxygen transport membranes
T2  - Journal of Membrane Science
UR  - http://dx.doi.org/10.1016/j.memsci.2017.02.010
UR  - http://hdl.handle.net/10044/1/44344
VL  - 529
ER  -
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