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

被引：18
|
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
收藏
页码：151 / 156
页数：6
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