The effect of chemicals on the viscosity and stability of coal water slurries

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

“…8, FDN adsorbs on coal particle by the lying form mainly by means of the electrostatic interactions between the sulfonic groups of FDN and the coal surface. FDN molecules are adsorbed on coal surface through the adsorption of fewer part naphthalene ring on the hydrophobic zone of coal surface, and on the hydrophilic zone of coal surface through ionic and hydrogen bonds between sulfo groups and coal surface [6] and the hydrophobic naphthalene rings orientate the solution, the thickness of adsorbed film is thinner, that is difficult to form larger steric hindrance despite FDN has more adsorption mass (Table 4).…”

“…Recent researches showed that the molecular structures of dispersants such as molecular weight, the functional group such as sulfonic group have great influences on the viscosity and stability of CWS. Sirkeci et al [6] found that anionic type of dispersant with different hydrophilic groups can increase the electronegativity of the coal surface and be beneficial for reducing the viscosity of CWS. Moreover, the sulfonic group in the dispersants molecules can form chemical bonds between coal particles and dispersants, thus can improve the stability and rheological properties of CWS.…”

Control of clay minerals effect in flotation. A review

“…Enrichment of minerals by flotation could be effected by interaction of particles the rheological data present an approach to directly understand this interaction. The rheology has been used to investigate particle-particle interactions in slurries of oxide minerals [18][19][20], clays and clay minerals [21][22][23][24], coal [25,26], sulphide minerals [27], and even gangue minerals such as talc [28][29][30]. Accurate measurement of the rheological properties of pulp is rather difficult, because the solid particles tend to settle during measurement.…”

Emission characteristics of PCDD/Fs, PAHs and PCBs during the combustion of sludge-coal water slurry

“…At present, many studies have focused on the pulping technology of coal water slurry [9,10], and the thermal gravimetric analysis (TGA) of SCWS combustion [11]. Liu et al [12] focused on the combustive temperature of oil sludge-coal water slurry by combustion kinetics, and the emission of inorganic pollutants.…”