Investigation of grafted sulfonated alkali lignin polymer as dispersant in coal-water slurry

摘要

A novel grafted sulfonated alkali lignin polymers (GSAL) with hydrophilic side chain and different molecular weights prepared were used as dispersants for coal-water slurry (CWS). The viscosity reduction for CWS had been attributed primarily to the diminution of coal particles (adsorbed GSAL) interaction of steric electrostatic repulsion and dramatic wettability. The adsorption amount of GSAL-3 can reach to 1.58 mg/g, and the isotherm of GSAL on coal surface belongs to the Langmuir model, the electrostatic self-assembly result indicated the dominant driving force of GSAL absorbed on coal surface was the pi-pi interaction. GSAL was superior in reducing the viscosities of OATS. (C) 2015 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.