Behavior of Surfactants in a Highly Loaded Coal–Water Slurry. I. Effects of Surfactant Concentration on Its Properties

Two types of anionic surfactants and one type of nonionic surfactant were investigated in order to clarify their roles and behaviors in a highly loaded coal–water slurry (CWM) of high coal concentration. Both saturated adsorption of the surfactant on coal particles and its presence in water were fou...

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Bibliographic Details
Published inBulletin of the Chemical Society of Japan Vol. 66; no. 5; pp. 1343 - 1349
Main Authors Ogura, Tsugitoshi, Tanoura, Masazumi, Hiraki, Akio
Format Journal Article
LanguageEnglish
Published Tokyo The Chemical Society of Japan 01.05.1993
Chemical Society of Japan
Subjects
Alternative fuels. Production and utilization
Applied sciences
Energy
Exact sciences and technology
Fuel slurries
Fuels
Viscosity
Alternative fuel
Molecular weight distribution
Liquid solid adsorption
Coal water mixture
Bituminous coal
Sulfonate
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Summary:Two types of anionic surfactants and one type of nonionic surfactant were investigated in order to clarify their roles and behaviors in a highly loaded coal–water slurry (CWM) of high coal concentration. Both saturated adsorption of the surfactant on coal particles and its presence in water were found to be necessary to prepare a practical CWM. The adsorption isotherms of the surfactants were described using the “Langmuir” equation. Each surfactant had a characteristic value of saturated adsorption. An estimation method of the required amount of the surfactant to prepare a practical CWM was proposed. The zeta potential of the CWM was found to vary with the coal concentration, and to be controlable using surfactants, thus failing to be a proper measure of the CWM at high coal concentrations.
ISSN:0009-2673
1348-0634
DOI:10.1246/bcsj.66.1343