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Effect of La on the thermal stability of Pd/γ-Al2O3 catalytic membranes |
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| Authors: | Tiandan Chen Hangrong Chen Hongguang Chen Lin Wang Jianlin Shi |
| Affiliation: | State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China |
| Abstract: | Lanthanum-doped Pd/γ-Al2O3 and Pd/γ-Al2O3 membranes were prepared by sol-gel methods. The thermal stability of the unsupported Pd/γ-Al2O3 and La/Pd/γ-Al2O3 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-Al2O3 membranes increased sharply after sintering at temperatures higher than 1000°C. Addition of 3 mol% lanthanum can raise the temperature of the γ-Al2O3 to -Al2O3 phase transformation significantly. This improves the thermal stability of the Pd/γ-Al2O3 catalytic membranes. |
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