High flux and CO2-resistance of La0.6Ca0.4Co1–Fe O3− oxygen-transporting membranes

Synthesis and Characterization of 40 wt % Ce0.9Pr0.1O2–δ–60 wt % NdxSr1−xFe0.9Cu0.1O3−δ Dual-Phase Membranes for Efficient Oxygen Separation

“…The very similar measurement values of the total mass changes at 1473 K as in Ar may suggest a certain adsorption of CO2 on the membrane surface and have to be further investigated (see below). A similar behavior was already reported in our previous study [40]. In the Ar/H2 atmosphere, a clearly different progression of the TGA curves was observed.…”

“…In this work, synthetic air was used as the feed gas and CO 2 or He as the sweep gas. A detailed description of the setup and process parameters for oxygen permeation measurements can be found in our previous studies [6,40]. Concerning the oxygen permeation tests, four different 40 wt % Ce 0.9 Pr 0.1 O 2−δ -60 wt % Nd 0.5 Sr 0.5 Fe 0.9 Cu 0.1 O 3−δ membranes have been tested to investigate the reproducibility and level of regeneration.…”

Roadmap for Sustainable Mixed Ionic‐Electronic Conducting Membranes

“…[5,6] Oxygen permeable membranes have been intensively investigated in the past decades and can be generally grouped into two types: single-phase and dual-phase (see Figure 2). [1,2,[15][16][17][18][19][20][21][22][23][24]7,[25][26][27][28][29][30][31][32][33][34]8,[35][36][37][38][9][10][11][12][13][14] Currently, Ba-, Sr-, or Co-containing single-phase perovskite-type oxygen-transporting membranes (OTMs) with a general formula of ABO 3 show high oxygen permeation and generally have an oxygen permeation flux of more than 1 mL min −1 cm −2 at 1173 K for a 1 mm-thick membrane. [1,2] However, these OTMs have a poor stability in the presence of CO 2 due to the formation of carbonates.…”

“…Intensive scientific research has been devoted to the development of perovskite-type oxygen permeable membranes with selecting suitable A-and B-site cations carefully to address the low chemical stability issue under a harsh gas atmosphere such as CO 2 . [1,2,[10][11][12] Development of protective layers on the surface of membranes is currently used as an effective approach to enhance the CO 2 resistance of the singlephase perovskite-type membranes. [2,13] Coating a CO 2 -resistant layer on the membrane surfaces can be achieved by several methods including chemical vapor deposition, spray pyrolysis, spin coating, physical vapor deposition, and plasma spraying.…”

“…The Tan-Li model assumes only the radial transport of charged defects takes place in plug flow conditions with negligible axial dispersion axial transport. The adaptation by Tan and Li [68] is exhibited in Equation (11). In another work, Tan et al [69] specified material balances and boundary conditions to enable the extension of Equation (11) according to different hollow fiber oxygen permeation operating modes that include different feed gas flow positions (directed into the hollow fiber shell or lumen), flow orientations (co-current or counter-current flow) and permeate side conditions (use of inert sweep gas or vacuum operation).…”