A CO2-stable reduction-tolerant Nd-containing dual phase membrane for oxyfuel CO2 capture

Huixia Luo; Tobias Klande; Zhengwen Cao; Fangyi Liang; Haihui Wang; Jürgen Caro

doi:10.1039/C3TA14870J

A CO₂-stable reduction-tolerant Nd-containing dual phase membrane for oxyfuel CO₂ capture†

Huixia Luo,*^ab Tobias Klande,^a Zhengwen Cao,^a Fangyi Liang,^a Haihui Wang*^c and Jürgen Caro*^a

* Corresponding authors

^a Institute of Physical Chemistry and Electrochemistry, Leibniz University of Hannover, Callinstr. 3A, Hannover, Germany
E-mail: juergen.caro@pci.uni-hannover.de
Fax: +49 511 762 19121
Tel: +49 511 762 3175

^b Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA
E-mail: huixial@princeton.edu
Fax: +1 609 258 6746
Tel: +1 609 258 5556

^c School of Chemistry & Chemical Engineering, South China University of Technology, No. 381 Wushan Road, 510640 Guangzhou, China
E-mail: hhwang@scut.edu.cn
Fax: +86 020 8711 0131
Tel: +86 020 8711 0131

Abstract

We report a novel CO₂-stable reduction-tolerant dual-phase oxygen transport membrane 40 wt% Nd_0.6Sr_0.4FeO_3−δ–60 wt% Ce_0.9Nd_0.1O_2−δ (40NSFO–60CNO), which was successfully developed by a facile one-pot EDTA–citric sol–gel method. The microstructure of the crystalline 40NSFO–60CNO phase was investigated by combined in situ X-ray diffraction (XRD), scanning electron microscopy (SEM), back scattered SEM (BSEM), and energy dispersive X-ray spectroscopy (EDXS) analyses. Oxygen permeation and long-time stability under CO₂ and CH₄ atmospheres were investigated. A stable oxygen flux of 0.21 cm³ min⁻¹ cm⁻² at 950 °C with undiluted CO₂ as sweep gas is found which is increased to 0.48 cm³ min⁻¹ cm⁻² if the air side is coated with a porous La_0.6Sr_0.4CoO_3−δ (LSC) layer. All the experimental results demonstrate that the 40NSFO–60CNO not only shows good reversibility of the oxygen permeation fluxes upon temperature cycling, but also good phase stability in a CO₂ atmosphere and under the harsh conditions of partial oxidation of methane to synthesis gas up to 950 °C.

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Article information

DOI: https://doi.org/10.1039/C3TA14870J
Article type: Paper
Submitted: 25 Nov 2013
Accepted: 09 Mar 2014
First published: 11 Mar 2014

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J. Mater. Chem. A, 2014,2, 7780-7787

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A CO₂-stable reduction-tolerant Nd-containing dual phase membrane for oxyfuel CO₂ capture

H. Luo, T. Klande, Z. Cao, F. Liang, H. Wang and J. Caro, J. Mater. Chem. A, 2014, 2, 7780 DOI: 10.1039/C3TA14870J

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Journal of Materials Chemistry A