Synthesis of γ-Alumina Porous Granules by Aluminium Nitrate Precursor as an Efficient Catalyst Support
نویسندگان
1 School of Metallurgy and Materials Engineering, Iran University of Science & Technology (IUST), Narmak, Tehran, Iran
2 Space Transportation Research Institute, Iranian Space Research Center, Tehran, Iran
3 Space Transportation Research Institute, Iranian Space Research Center, Tehran, Iran
4 School of Metallurgy and Materials Engineering, Iran University of Science & Technology (IUST), Narmak, Tehran, Iran
doi
10.22052/JNS.2025.02.025چکیده
Gamma-alumina (γ-Al2O3) granules were synthesized as iridium catalyst supports for hydrazine decomposition. The granules have new physical and textural properties which are critical in determining the catalytic performance. Aluminium nitrate precursor changes the structure of γ-Al2O3 and affects the support interactions at 450 ℃ and 750 ℃. This leads to the facile gas exhaust and makes it more resistant to the pores of the catalyst during decomposition of hydrazine monohydrate. As a result, higher conversion of hydrazine and selectivity to hydrogen is achieved compared to the catalysts prepared by supports that are crushed. The γ-Al2O3 granules with mechanical strength from 7.12 to 25.56 N⁄granule is obtained. Specific surface area, volume and the diameter of porous granules are 346.02 m2/g, 4.94 nm, 0.29 to 0.43 m3/g, respectively.
