Abstract
Tubular macro-porous supports for ceramic micro-filtration membranes were prepared by extrusion followed by sintering from low cost commercial grade cordierite powder. The effects of sintering temperature on the micro-structure, fracture strength, LTEC (linear thermal expansion coefficient), pore size distribution and permeation flux were studied. Our results indicate that the optimized sintering temperature was in the vicinity of 1380 °C. The fabricated cordierite supports showed an average pore diameter of 8.66 μm, open porosity of 36.20%, nitrogen gas flux of 1.45 × 10 4 m 3 m −2 h −1 and LTEC of 4.34 × 10 −6 °C −1 (between 25 and 1000 °C). To verify the practicability in the strong corrosive environment, the chemical resistance tests were carried out in the sodium hydroxide and sulfuric acid solutions under the boiling condition, respectively. Compared with the as-used alumina supports, the cordierite supports exhibited better thermal alkali resistance but poorer acid resistance according to the mass loss results. In addition, the corroded cordierite supports were characterized by fracture strength, open porosity and pore size distribution. The fabricated macro-porous supports are expected to have potential applications in the pre-treatment of strong alkali media and dust-containing hot gas.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
