CO2-tolerant ceramic membrane driven by electrical current for oxygen production at intermediate temperatures
MetadataShow full item record
In this work, an electrochemical oxygen pump ceramic membrane based on Sm0.2Ce0.8O1.9 (SDC) electrolyte and La0.6Sr0.4FeO3−δ (LSF) electrode was prepared and characterized by XRD, SEM, and EDX. The area specific resistance of the membranes was measured by impedance spectroscopy. The oxygen electrical permeation behavior of SDC/LSF membrane was investigated under different operating conditions. In consistent with the theoretical prediction from Faraday law, the oxygen flux value observed is closely correlated in quantity with the applied current density. The permeation (or Faraday) efficiency of SDC/LSF membrane could reach above 95% at lower temperatures (600°C–700°C). At 700°C, the oxygen flux through SDC/LSF membrane with 3000 mA/cm2 current density could reach ~9.97 mL/cm2/min. In addition, the prepared SDC/LSF membrane electrical performance was also tested under the presence of CO2. It was found that SDC/LSF membrane has excellent structure and permeation stability against CO2 gas, reflecting its potential applications like oxyfuel technologies and hydrocarbon oxidations.
Showing items related by title, author, creator and subject.
Shao, Xin; Dong, Dehua; Parkinson, Alan; Li, Chun-Zhu (2014)Microchanneled membranes have demonstrated high oxygen permeation fluxes owing to the shortened oxygen permeation distance and the enlarged membrane surface area. In this study, further improvement of the oxygen permeation ...
Highly stable external short-circuit-assisted oxygen ionic transport membrane reactor for carbon dioxide reduction coupled with methane partial oxidationZhang, Kun; Liu, Lihong; Sunarso, J.; Yu, H.; Pareek, V.; Liu, Shaomin (2014)A membrane reactor allows for simultaneous separation and reaction, and thus, can play a good role to produce value-added chemicals. In this work, we demonstrated such a membrane reactor based on fluorite oxide samarium-doped ...
Highly Stable External Short-Circuit-Assisted Oxygen Ionic Transport Membrane Reactor for Carbon Dioxide Reduction Coupled with Methane Partial OxidationZhang, K; Liu, Lihong; Sunarso, J.; Yu, H.; Pareek, Vishnu; Liu, Shaomin (2014)A membrane reactor allows for simultaneous separation and reaction, and thus, can play a good role to produce value-added chemicals. In this work, we demonstrated such a membrane reactor based on fluorite oxide samarium-doped ...