ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7

Published monthly
 

Coprecipitation synthesis of Si-modified mesoporous alumina with high thermal stability from coal fly ash

Yusheng Wu, Laishi Li, and Xu Yang

School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, China

 

E-mail: wuyus@sut.edu.cn

Received: 31 October 2019  Accepted: 10 February 2020

Abstract:

Si-modified mesoporous alumina with high thermal stability was synthesized from coal fly ash through a facile coprecipitation method using NH4HCO3 and NH4Al(SO4)2. The effects of Si dopant contents on the characterization of alumina were investigated using X-ray diffraction, Fourier transform infrared spectroscopy, N2 adsorption–desorption method and transmission electron microscopy. The results show that the introduction of Si effectively inhibits the phase transformation of mesoporous alumina from γ-Al2O3 to α-Al2O3. Compared with alumina obtained without Si dopant, the specific surface area of mesoporous alumina with adding 12 wt% Si improved from 5.2 to 227.5% by increasing the calcination temperature from 500 to 1200 °C, respectively. The specific surface area, pore volume and pore size of mesoporous alumina with 12 wt% Si calcined at 1100 °C are 149 m2/g, 0.52 cm3/g and 8.9 nm, respectively.

Keywords: Mesoporous alumina; Si dopant; Coal fly ash; Thermal stability; AACH

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-020-01101-9

 

Chemical Papers 74 (8) 2537–2543 (2020)

Wednesday, April 24, 2024

IMPACT FACTOR 2021
2.146
SCImago Journal Rank 2021
0.365
SEARCH
Advanced
VOLUMES
European Symposium on Analytical Spectrometry ESAS 2022
© 2024 Chemical Papers