Synthesis of mesoporous spherical γ-Al2O3 particles with varying porosity by spray pyrolysis of commercial boehmite

被引：19

作者：

Choi, Jaehyung ^{[1
]}

Yoo, Kye Sang ^{[2
]}

Kim, Sung-Don ^{[3
]}

Park, Hyung-Kyu ^{[3
]}

Nam, Chul-Woo ^{[3
]}

Kim, Jinsoo ^{[1
]}

机构：

[1] Kyung Hee Univ, Dept Chem Engn, Yongin, South Korea

[2] Seoul Natl Univ Sci & Technol, Dept Chem & Biomol Engn, Seoul, South Korea

[3] Korea Inst Geosci & Mineral Resources, Mineral Resources Res Div, Daejeon, South Korea

来源：

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY | 2017年 / 56卷

关键词：

Mesoporous; gamma-Alumina; Spray pyrolysis; Boehmite; Phase transformation; COPRECIPITATION METHOD; ALUMINA; CATALYSTS; STABILITY;

D O I：

10.1016/j.jiec.2017.07.007

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Mesoporous spherical gamma-Al2O3 particles were prepared by spray pyrolysis of commercial boehmite without the use of templating materials. Before spray pyrolysis, a boehmite slurry was prepared through thermal acid treatment of commercial boehmite with various concentrations of HNO3. The spray pyrolysis process produced spherical gamma-Al2O3 particles with a size of 1 mu m regardless of the pretreatment conditions. However, the dominant pore size of the produced gamma-Al2O3 particles shifted from 35 nm to 3.5 nm when the molar ratio of [HNO3]/[AlOOH] increased from 0.06 to 0.24 during thermal acid treatment. (C) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

引用

页码：151 / 156

页数：6

共 22 条

[1] Nanocrystalline mesoporous γ-alumina powders "UPMC1 material" gathers thermal and chemical stability with high surface area [J].