Iranian Journal of Ceramic Science & Engineering
Volume 11, Issue 3 (12-2022)
2022, 11(3): 55-66 |
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Shabani S, Mirkazemi S M, Rezaie H R, Vahidshad Y. Synthesis and application of mesoporous gamma alumina granules as iridium catalyst support. Iranian Journal of Ceramic Science & Engineering 2022; 11 (3) :55-66
URL: http://ijcse.ir/article-1-901-en.html
URL: http://ijcse.ir/article-1-901-en.html
1- IUST
2- IUST , mirkazemi@iust.ac.ir
3- ISRC
2- IUST , mirkazemi@iust.ac.ir
3- ISRC
Abstract: (1444 Views)
Mesoporous gamma-alumina granules, which are known as a common catalyst support in industrial applications were synthesized via the sol gel-oil drop method having a diameter of 1-2 mm. The effect of calcination temperature (450 and 750 °C) on the properties of gamma alumina granules were studied and the functionality of 20 wt% iridium catalyst on the alumina granules for hydrazine decomposition was evaluated. The presence of gamma-alumina as the only constituent phase up to 750 °C was revealed by XRD analysis. According to N2 adsorption-desorption analysis, the specific surface area of gamma alumina granules calcined at 450 and 750 °C was 303.05 and 227 m2/g, respectively. HR-TEM analysis was used to investigate the granules’ morphology, and the capability of the granules as a support for iridium catalyst was evaluated during the hydrazine decomposition test. Using alumina granules calcined at 750 °C as the catalyst support, the hydrogen selectivity reached 22% and the decomposition rate was 235 h-1, and the granules’ crushing level was as low as 7% during the test, indicating that the granules have an acceptable surface area, pores diameter, and interconnectivity.
Type of Study: Research |
Subject:
New Methods of Processing and Fabrication of Ceramics
Received: 2022/03/14 | Accepted: 2022/09/7
Received: 2022/03/14 | Accepted: 2022/09/7
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