| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1643225 | Materials Letters | 2015 | 4 Pages |
•A ultra-high purity ceramic support has been prepared from boehmite-coated alumina.•The support has high open porosity, permeability and narrow pore size distribution.•The support has durable flexural strength and excellent corrosion resistance.•The good corrosion resistance of the supports mainly benefit from the high purity.
An ultra-high purity porous alumina ceramic support was prepared by boehmite-coated alumina powders at a relatively low temperature. Its corrosion resistance in 20 wt% H2SO4 and 10 wt% NaOH hot solutions for 2 to 8 h was investigated. After corrosion in H2SO4 solution for 8 h, the mass loss was only 0.55%, the flexural strength decreased by 9.85% and the open porosity increased from 41.14% to 47.25%. Meanwhile, the average pore diameter increased from 1.22 μm to 1.60 μm. While in NaOH solution for 8 h, the mass of the support and the flexural strength were diminished by 0.48% and 8.08%, the open porosity and the average pore size were increased to 46.48% and 1.49 μm. The permeability increases from 7.18×10−10 m2 to 1.35×10−9 m2 and 1.25×10−9 m2, respectively, after acidic and alkaline corrosion for 8 h. The support shows an excellent corrosion resistance.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide
