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Effect of La on the thermal stability of Pd/γ-Al2O3 catalytic membranes
- Source :
- Ceramics International. 27:883-887
- Publication Year :
- 2001
- Publisher :
- Elsevier BV, 2001.
-
Abstract
- Lanthanum-doped Pd/γ-Al 2 O 3 and Pd/γ-Al 2 O 3 membranes were prepared by sol-gel methods. The thermal stability of the unsupported Pd/γ-Al 2 O 3 and La/Pd/γ-Al 2 O 3 membranes was investigated with BET (including average pore size, pore volume and BET surface area), XRD, and DTA techniques. The average pore size of the Pd/γ-Al 2 O 3 membranes increased sharply after sintering at temperatures higher than 1000°C. Addition of 3 mol% lanthanum can raise the temperature of the γ-Al 2 O 3 toα-Al 2 O 3 phase transformation significantly. This improves the thermal stability of the Pd/γ-Al 2 O 3 catalytic membranes.
- Subjects :
- Catalytic membrane
Materials science
Process Chemistry and Technology
Sintering
Mineralogy
chemistry.chemical_element
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Membrane
Volume (thermodynamics)
chemistry
Phase (matter)
Materials Chemistry
Ceramics and Composites
Lanthanum
Thermal stability
Nuclear chemistry
BET theory
Subjects
Details
- ISSN :
- 02728842
- Volume :
- 27
- Database :
- OpenAIRE
- Journal :
- Ceramics International
- Accession number :
- edsair.doi...........a7f606365e00d890798a022a92044cc4