Effect of Mixtures of Anion-active and Nonionic Surfactants on Rheological Properties of Coal-Water Suspensions
T. V. LUTSENKO, D. P. SAVITSKIY, A. S. MAKAROV
Dumansky Institute of Colloid Chemistry and Chemistry of Water, National Academy of Sciences of Ukraine, Kyiv, Ukraine
Keywords: водоугольные суспензии, поверхностно-активные вещества, реологические свойства, критическая концентрация мицеллообразования, coal-water suspensions, surfactants, rheological properties, critical concentration for micelle formation
Abstract
The rheological properties of coal-water suspensions prepared by the mechanoactivation method of coal in the dispersion medium with the addition to the main reagent (sulphurised naphthalene formaldehyde) of anionic and nonionic surfactants. It was found that the joint use of surfactants allowed increasing the concentration of coal in suspensions due to a more efficient liquefaction process. Coal-water suspensions obtained using nonionic (oxyethylated octylphenols) and anion-active surfactants (sodium dodecyl sulphate and sodium dodecylbenzenesulfonate) are characterized by the optimum rheological properties.
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