Synthesis of Macro-Mesostructured γ-Al2O3 with Large Pore Volume and High Surface Area by a Facile Secondary Reforming Method

被引:0
作者
Meng Xiuhong [1 ,2 ]
Duan Linhai [2 ]
Xie Xiaohua [2 ]
Wang Qiang [3 ]
Wang Haiyan [1 ,2 ]
机构
[1] Liaoning Shihua Univ, Coll Chem Chem Engn & Environm Engn, Fushun 113001, Liaoning, Peoples R China
[2] China Univ Petr, Coll Chem Engn, Qingdao 266555, Peoples R China
[3] Beijing Forestry Univ, Coll Environm Sci & Engn, Beijing 100083, Peoples R China
关键词
gamma-Al2O3; macro-mesostructured; reforming method; large pore volume; high surface area; THERMAL-DECOMPOSITION; ALUMINA POWDERS; DAWSONITE; SIZE; PRECIPITATION; CATALYST; BOEHMITE;
D O I
暂无
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Through improving the aging process during synthesis of the support, gamma-Al2O3 with large pore volume and high surface area was synthesized by a facile secondary reforming method. The synthesis parameters, such as the reaction temperature, the first aging temperature and the second aging temperature, were investigated. The textural properties of gamma-Al2O3 were characterized by means of N-2 adsorption-desorption isotherms, X-ray powder diffractometry (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy and thermogravimetry (TG). The experimental results indicated that AACH and amorphous AlOOH were the precursors of alumina, which were formed via precipitation from solutions after reaction of aluminum sulphate with ammonium hydrogen carbonate. The precursor nanocrystallites grew and re-assembled during the secondary reforming process, which resulted in an increased pore size and pore volume and a decreased bulk density. The as-synthesized gamma-Al2O3 materials featured meso/macroporosity, large pore volume (2.175 cm(3)/g), high surface area (237.8 m(2)/g), and low bulk density (0.284 g/mL).
引用
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页码:20 / 28
页数:9
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