2016
DOI: 10.1021/acs.chemmater.6b01274
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Oxygen Storage Properties of La1–xSrxFeO3−δ for Chemical-Looping Reactions—An In Situ Neutron and Synchrotron X-ray Study

Abstract: Oxygen storage materials (OSMs) provide lattice oxygen for a number of chemical-looping reactions including natural gas combustion and methane reforming. La1–x Sr x FeO3−δ has shown promise for use as an OSM in methane reforming reactions due to its high product selectivity, fast oxide diffusion, and cycle stability. Here, we investigate the structural evolution of the series La1–x Sr x FeO3−δ for x = 0, 1/3, 1/2, 2/3, and 1, using in situ synchrotron X-ray and neutron diffraction, as it is cycled under the co… Show more

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Cited by 61 publications
(31 citation statements)
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“…The structural change in the LSFO channel is attributed to oxygen vacancy formation within LSFO, consistent with previous works that demonstrated oxygen loss leads to a lattice expansion in LSFO. 42,43 Comparing these results to previous experiments of uncapped LSFO films, 44 the changes in the LSFO lattice parameter are smaller and take longer than a single layer of an uncapped LSFO film of similar thickness heated to 200 • C. This difference is thought to arise from the GDC forming a barrier layer that partially inhibits the reduction of LSFO. Without the presence of the GDC layer, the oxygen ions are more readily desorbed from the surface.…”
supporting
confidence: 65%
“…The structural change in the LSFO channel is attributed to oxygen vacancy formation within LSFO, consistent with previous works that demonstrated oxygen loss leads to a lattice expansion in LSFO. 42,43 Comparing these results to previous experiments of uncapped LSFO films, 44 the changes in the LSFO lattice parameter are smaller and take longer than a single layer of an uncapped LSFO film of similar thickness heated to 200 • C. This difference is thought to arise from the GDC forming a barrier layer that partially inhibits the reduction of LSFO. Without the presence of the GDC layer, the oxygen ions are more readily desorbed from the surface.…”
supporting
confidence: 65%
“…Here, the model assumes that the solid in the dual circulating fluidized bed consists of active material only, i.e. no support material is added to the oxygen carrier material (Taylor et al, 2016). The net electrical efficiency, excluding the flue gas cleaning requirements, is 38.9 %.…”
Section: Chemical Looping Air Separation For Electricity Productionmentioning
confidence: 99%
“… 50 Perovskite-based metal oxides have demonstrated good performance for the production of syngas from CH 4 . 51 54 Perovskites have the general formula of ABO 3 , where A represents a rare earth metal and/or an alkaline earth metal, and B is a transition metal. 55 , 56 Perovskites generally possess good redox properties under the appropriate temperature and pressure conditions, 55 , 56 offer more resistance to carbon deposition, and are thermodynamically suitable to convert CH 4 to syngas.…”
Section: Introductionmentioning
confidence: 99%