Study on the stability of coal water slurry usingdispersion-stability analyzer
LI Peng-wei, YANG Dong-jie*, LOU Hong-ming, QIU Xue-qing
School of Chemistry and Chemical Engineering, Guangdong Provincial Laboratory of Green Chemical Technology, South China University
of Technology, Guangzhou 510640, China
Abstract: Effect of modified lignin series and naphthalene series dispersants on the stability of coal water slurry (CWS) and
sedimentation behavior of coal particles were investigated using Turbiscan Lab dispersion-stability analyzer. The results indicate that
the sedimentation behavior of coal particles of CWS belongs to differential sedimentation and there is a conglobation between coal
particles in CWS preparation. Stability of CWS prepared with lignin series dispersants is better than that prepared with naphthalene
series, and the height and mean sedimentation rate of clarifying zone is about 68% of that of FDN when the dosage of additives is
1.0%. The Turbiscan Lab dispersion-stability analyzer can analyze the stability of CWS and also can be useful to investigate the
stability mechanism of CWS.
Key Words: dispersants; coal water slurry (CWS); stability; dispersion-stability analyser
JOURNAL OF FUEL CHEMISTRY AND TECHNOLOGY
Volume 36, Issue 5, October 2008
Online English edition of the Chinese language journal
Received: 23-Feb-2008; Revised: 30-May-2008
* Corresponding author. Tel: +86 20 87114722; E-mail: cedjyang@scut.edu.cn
Foundation item: Supported by the National Natural Science Foundation of China (20676040), and High-tech Research and Development Program of China
(2007AA06Z322).
Copyright © 2008, Institute of Coal Chemistry, Chinese Academy of Sciences. Published by Elsevier Limited. All rights reserved.
Cite this article as: J Fuel Chem Technol, 2008, 36(5), 524−529