Electrochemical dehumidification using proton conducting ceramics

Electrochemical dehumidification using a proton conducting ceramic as a sol id electrolyte was studied. The working principle, based on the electrochem ical hydrogen pump, is elucidated and experimental studies on this type of device an described. It was verified that the dehumidifier using a SrCeO3-b ased proton conducting ceramic worked successfully on a laboratory-scale an d that the dehumidifier could desiccate the test gas to 6.7 Pa (dew point: about -45 degreesC). This type of device may be a convenient dehumidifier s uitable for use in small, closed systems in scientific instruments. (C) 200 0 Elsevier Science B.V. All rights reserved.