Fabrications and evaluations of hydrogen permeation on Al2O3/CeO2/graphene (ACG) composites membrane by Hot Press Sintering (HPS)

Ceramic membrane has high permeation rate of hydrogen and chemical stability. Al2O3 indicates stable at high temperature and a relatively large surface area. In addition, Al2O3 of porous is used as hydrogen separation membranes support, because of the high hydrogen permeability based on Knudsen diffusion mechanism. s work, metal alkoxides as starting materials was used Aluminum isopropoxide powder. Then CeO2 as catalyst at the partial oxidation and Graphene Oxide as electrical conductivity are added, Al2O3–CeO2–Graphene oxide (ACG) composites are synthesized by sol–gel process. ACG membrane was fabricated type of disk by Hot Press Sintering. A synthesized ACG composite material was characterized by EDS, SEM, TG/DTA, XRD, BET. The hydrogen permeation property of ACG membrane was measured by Sievertʹs type hydrogen permeation membrane equipment. The hydrogen permeability of ACG membranes was examined at RT-673 K under increasing pressure. Results, hydrogen permeability was obtained to 2.62 × 10−7 mol/ms Pa1/2 at 673 K under 0.3 MPa.