Ultrahigh-surface-area γ-Al2O3 materials with special morphologies and hierarchically porous structures were prepared at room temperature by one-step hydrolysis of metal alkoxide under different aqueous organic solvents systems. With the aid of X-ray diffraction(XRD), N2 adsorption-desorption, scanning electronic microscopy(SEM) and transmission electron microscope(TEM), it was proved that the hydrolysis and condensation process of aluminum tri-sec-butoxide and the diffusion behavior of by-product alcohol molecules could be precisely controlled by the water content and the type of solvent, thereby the product structure were optimized in return. The results show that the γ-Al2O3 material with straight macroporous wall and 3D-mesporous was obtained under the water/acetonitrile system, meanwhile, the smooth, flaky and wrinkled morphologies appeared in the macroporous wall in turn as the water content increased. However, only 3D-mesporous structure stacked with 10 nm-thick flaky γ-Al2O3 could be observed for the material prepared under the saturated butanol solution system with the specific surface area of up to 517 m2/g. Besides, the macro-mesoporous γ-Al2O3 material prepared under the 3 mL water content in the water/acetonitrile system was selected as the carrier for Pt-based catalyst. The carrier structure basically remained intact after the loading process and metal Pt nanoparticles were uniformly dispersed on the carrier. The hierarchical γ-Al2O3 supported Pt-based catalyst showed better hydrodemetallization performance than the commercial boehmite supported catalyst, and the Ni and V removal rate increased by 11.62% and 10.83%, respectively.
|Translated title of the contribution||Preparation of High-surface-area Hierarchically Porous γ-Al2O3 by One-step Hydrolysis of Metal Alkoxide and Performance|
|Number of pages||10|
|Journal||Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities|
|Publication status||Published - 10 Jun 2020|
- Hierarchically porous structure
- One-step hydrolysis of metal alkoxide
- Residual oil hydrogenation
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Technological Platform Physical Chemistry and characterization
Facility/equipment: Technological Platform