Experimental and computational studies of polycarboxylate dispersant effect on the properties of low‐rank coal water slurries

Wu, Huijun; Lv, Dongmei; Nie, Yunhao; Jiang, Tingao; Li, Jing; Gong, Shuwen; Yan, Hui

doi:10.1002/apj.2837

Cited by 6 publications

(1 citation statement)

References 44 publications

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“…The most suitable PC dispersants for pulping were selected according to the viscosity of each type of CWS at 100 s −1 , shear thinning behavior, static stability (>14), and maximum solid loads (>55 wt%). Polycarboxylate dispersants are effectively adsorbed on the surface of coal particles through horizontal multipoint adsorption, mainly through the interaction between the hydrophobic groups of dispersant molecules and the hydrophobic regions of coal particles, finally intensifying the hydrophilicity of coal particles and the stability of the hydration membrane [73].…”

Section: Cationic Dispersantsmentioning

confidence: 99%

Progress of Dispersants for Coal Water Slurry

Liu,

Wang,

Liu

et al. 2023

Molecules

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Dispersants, serving as an essential raw material in the formulation of coal water slurry, offer an economical and convenient solution for enhancing slurry concentration, thus stimulating significant interest in the development of novel and efficient dispersants. This paper intends to illuminate the evolution of dispersants by examining both the traditional and the newly conceived types and elaborating on their respective mechanisms of influence on slurry performance. Dispersants can be classified into anionic, cationic, amphoteric, and non-ionic types based on their dissociation properties. They can be produced by modifying either natural or synthetic products. The molecular structure of a dispersant allows for further categorization into one-dimensional, two-dimensional, or three-dimensional structure dispersants. This document succinctly outlines dispersants derived from natural products, three-dimensional structure dispersants, common anionic dispersants such as lignin and naphthalene, and amphoteric and non-ionic dispersants. Subsequently, the adsorption mechanism of dispersants, governed by either electrostatic attraction or functional group effects, is elucidated. The three mechanisms through which dispersants alter the surface properties of coal, namely the wetting dispersion effect, electrostatic repulsion effect, and steric hindrance effect, are also explained. The paper concludes with an exploration of the challenges and emerging trends in the domain of dispersants.

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Section: Cationic Dispersantsmentioning

confidence: 99%