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

Yuan He, Lei Shi, Fan Wu, Weiwei Xie, Shu Wang, Dong Yan, Peijiang Liu, Man Rong Li, Jürgen Caro, Huixia Luo

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)84-92
Number of pages9
JournalJournal of Materials Chemistry A
Volume6
Issue number1
DOIs
StatePublished - 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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