Effect of Mixtures of Anion-active and Nonionic Surfactants on Rheological Properties of Coal-Water Suspensions
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.