Abstract
A new nano-assembly approach has been proposed for the preparation of macropore volume mesoporous aluminum oxide supports. Secondary nano-assembly and a frame structure mechanism for large pore volume mesoporous supports have been proposed. In a primary nano-assembly supersoluble micelle, aluminum hydroxide nanoparticles were precipitated in situ in surfactants with a volume balance (VB) less than 1, followed by secondary nano-assembly in linear and cylindrical shapes. The secondary nano-assembly of cylindrical aluminum hydroxides was calcined to form nano cylindrical aluminum oxides. For the formation of macropore volume mesoporous supports, we utilized a frame structure mechanism of mesoporous support, in which the exterior surface of the carrier may not be continuous. This macropore volume support has been used for the hydrotreatment of a residual oil catalyst, which possesses the following physical characteristics: pore volume 1.8–2.7 mL·g−1, specific surface area 180–429 m2·g−1, average pore diameter 17–57 nm, average pore diameter more than 10 nm (81%–94%), porosity 87%–93%, and crush strength 7.7–25 N·mm−1.
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Wang, D. Large pore volume mesoporous aluminum oxide synthesized via nano-assembly. Sci. China Ser. B-Chem. 52, 2114–2124 (2009). https://doi.org/10.1007/s11426-009-0290-x
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DOI: https://doi.org/10.1007/s11426-009-0290-x