Oxygen selective ceramic hollow fiber membranes

✍ Scribed by Shaomin Liu; George R. Gavalas

• Book ID: 104054001
• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 492 KB
• Volume: 246
• Category: Article
• ISSN: 0376-7388
• DOI: 10.1016/j.memsci.2004.09.028

✦ Synopsis

Oxygen ion conducting Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ hollow fiber membranes with o.d. 1.15 mm and i.d. 0.71 mm were fabricated using a sequence of extrusion, gelation, coating and sintering steps. The starting ceramic powder was synthesized by combined EDTA-citrate complexing followed by thermal treatment at 900 • C. The powder was then dispersed in a polymer solution, and extruded through a spinerette. After gelation, an additional thin coating of the ceramic powder was applied on the fiber, and sintering was carried out at 1190 • C to obtain the final ceramic membrane. The fibers were characterized by SEM, and tested for air separation at ambient pressure and at temperatures between 700 and 950 • C. The maximum oxygen flux measured was 5.1 mL/min/cm 2 at 950 • C.