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A novel dual phase membrane 40 wt% Nd0.6Sr0.4CoO3−δ–60 wt% Ce0.9Nd0.1O2−δ: design, synthesis and properties

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Abstract

Oxygen permeation, stability and chemical bonding characteristics of 40 wt% Nd0.6Sr0.4CoO3−δ–60 wt% Ce0.9Nd0.1O2−δ (40NSCO–60CNO) dual-phase composite membrane reactors were investigated. The 40NSCO–60CNO oxygen permeable membrane was prepared via an in situ one-pot one-step EDTA–citric acid method. The crystal structure of the 40NSCO–60CNO dual phase material was characterized by X-ray diffraction (XRD) and in situ XRD. The microstructure was investigated using transmission electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM) combined with energy-dispersive X-ray spectroscopy (EDXS) and electron energy-loss spectroscopy (EELS). The results show that the 40NSCO–60CNO composite represents a micro-scale mixture of only the two pure phases NSCO and CNO. The oxygen permeation fluxes through the 40NSCO–60CNO dual phase membrane were measured at elevated temperatures (900–1000 °C) with one side of it exposed to synthetic air and the other side to a flowing He gas stream. A stable oxygen permeation rate of 0.90 mL cm−2 min−1 was obtained with a 0.4 mm thick membrane under an air/He oxygen partial pressure gradient at 1000 °C. The 40NSCO–60CNO dual phase membrane with a thickness of 0.6 mm showed a stable oxygen flux of 0.55 mL cm−2 min−1 at 950 °C for 100 h under pure CO2 sweeping.

Graphical abstract: A novel dual phase membrane 40 wt% Nd0.6Sr0.4CoO3−δ–60 wt% Ce0.9Nd0.1O2−δ: design, synthesis and properties

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Publication details

The article was received on 06 Sep 2017, accepted on 30 Oct 2017 and first published on 30 Oct 2017


Article type: Paper
DOI: 10.1039/C7TA07842K
Citation: J. Mater. Chem. A, 2017, Advance Article
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    A novel dual phase membrane 40 wt% Nd0.6Sr0.4CoO3−δ–60 wt% Ce0.9Nd0.1O2−δ: design, synthesis and properties

    Y. He, L. Shi, F. Wu, W. Xie, S. Wang, D. Yan, P. Liu, M. Li, J. Caro and H. Luo, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA07842K

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