Vol 1 Chapter 21: Grace: Development of Supported Palladium Alloy Membranes
Hallgeir Klette, Henrik Raeder, Yngve Larring and Rune Bredesen
Abstract: The present study reports development and testing of flat and tubular supported palladium alloy membrane modules at SINTEF. Membranes with thickness in the range of 1 mm have been prepared by a two-stage magnetron sputter process using a single crystal silicon wafer as intermediate support and a wire mesh or porous material as final support. Testing of the hydrogen flux through the tubular membranes at 3008C has shown that permeance values of about 3 £ 1026 mol/(m2 s Pa) can be attained. For a flat membrane, peak permeance values of about 6.8 £ 1026 mol/(m2 s Pa) was attained at 300 8C. The membranes are able to separate hydrogen gas from nitrogen gas with 100% selectivity within the detection limits of the equipment. Tubular membrane supports that have been reinforced by a steel insert have been tested up to 14 bar transmembrane pressure. Although the selectivity drops at high pressure, the tests show that the membrane film does not disintegrate at high pressure even at 300 8C. Some of the membranes described have been shipped to ITM-CNR in Italy for catalytic reactor testing as a part of the GRACE program.
Carbon Dioxide Capture for Storage in Deep Geologic Formations – Results from the CO2 Capture Project Capture and Separation of Carbon Dioxide from Combustion Sources - Volume 1
Edited by: David C. Thomas, Senior Technical Advisor, Advanced Resources International Inc, USA
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