Cermet Oxygen Membranes with Controllable Nanoarchitecture for Novel Coal Power Engineering
V. V. ZYRYANOV, A. A. MATVIENKO, N. V. BULINA, A. S. ULIKHIN, M. P. POPOV
Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, Ul. Kutateladze 18, Novosibirsk 630128 (Russia)
Keywords: нанокомпозиты, керметы, кислородные мембраны, деградация, чистая угольная энергетика, распределенная мультигенерация, nanocomposites, cermets, oxygen membranes, degradation, clean coal power engineering, distributed multigeneration
Abstract
Results of the synthesis of multilevel nanometre-sized cermets with interpenetrative structure based on -Bi2O3/Ag, for selective medium-temperature oxygen membranes needed for novel clean coal-based power engineering are presented. In particular, the size of crystallites of the components was decreased to 10-20 nm; the composition of the ceramics was improved by adding Pr; silver is doped heterogeneously by fluorite, with the conservation of compatibility and with increased fraction of silver in cermet with interpenetrative structure; nanocermets are modified with Pd. In spite of the significant improvement of the composite characteristics in comparison with known cermet 60Bi0.75Er0.25O1.5/40Ag, the problem of making a real material for membranes has not been solved. Membrane degradation in all positions at T ~ 600 °C comes to the forefront. Along with optimization of the composition and method to obtain membrane material, it is proposed to decrease the working temperature to T ~ 500 °C.
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