کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1296262 1498334 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of microstructure and catalyst coating on the oxygen permeability of a novel CO2-resistant composite membrane
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Effect of microstructure and catalyst coating on the oxygen permeability of a novel CO2-resistant composite membrane
چکیده انگلیسی

Dual-phase membranes based on oxygen-ion-conducting doped ceria and electron-conducting lanthanum chromite show appreciable oxygen flux and good chemical compatibility between the two phases. In this work, Sm0.2Ce0.8O2−δ–La0.7Ca0.3CrO3−δ (volume ratio 60:40) composite membranes with different grain sizes are prepared. Membranes with large grains (1–5 μm) show much higher permeability than those with small grains (~ 300 nm). Applying a surface coating of a Sm0.2Ce0.8O2−δ–Sm0.5Sr0.5CoO3−δ catalyst reduces the running-in time from 220 to several hours and improves the steady-state permeability. The performance of the composite membrane is maintained when applying pure CO2 as sweep gas, showing promising potential in the application of these membranes in oxyfuel processes using CO2-diluted oxygen.

Research highlights
► A dual-phase Sm0.2Ce0.8O2-δ-Sm0.5Sr0.5CoO3-δ dense oxygen-selective me brane is prepared.
► This membrane shows high and stable oxygen permeance in a CO2 environment.
► The application of a Sm0.2Ce0.8O2-δ-Sm0.5Sr0.5CoO3-δ reduces running-in time and improves oxygen permeation performance.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 190, Issue 1, 19 May 2011, Pages 46–52
نویسندگان
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