Comparative study on distribution characteristics of anionic dispersants in coal water slurry

Hu，Shunxuan1; Li，Junguo2,3; Liu，Ke1,2,3; Chen，Yumeng2,3

2022-09-05

10.1016/j.colsurfa.2022.129176

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS   影响因子和分区

0927-7757

1873-4359

The anionic dispersants, i.e., sodium lignosulfonate (SLF), naphthalene sulfonate formaldehyde (NSF) and sodium polystyrene sulfonate (PSS), were commonly used to prepare a high concentrated coal water slurry (CWS). In order to reveal the distribution characteristics of the dispersants in CWS system and their adsorption behaviors on coal particle surface, the adsorption experiments, surface tension measurements, contact angle measurements and XPS analysis were conducted in this study. The saturation adsorption amount of dispersants on the coal surface was SLF > NSF > PSS. The fitting results showed that the three anionic dispersants were all monolayer adsorption with a chemical reaction or electron exchange. Surface tension measurements indicated that most SLF molecules were still dissolved in the liquid phase because of the lowest adsorption quantity and packing densities at the liquid-air interface. Contact angle measurements suggested that the hydrophilic groups of the dispersants were stretched to the solution. The adsorbed layer thickness of coal with different dispersants was uniform with the adsorption amount on the coal-liquid interface, which was opposed to the order of the adsorption amount on the liquid-air interface. It was concluded that there were competitive adsorptions between the liquid-air interface and the coal-liquid interface.

Anionic dispersants Coal water slurry Distribution characteristics Interaction Interface

SCI ; EI

英语

第一 ; 通讯

Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06N532];

Chemistry

Chemistry, Physical

WOS:000808265400004

ELSEVIER

20222112142663

Adsorption ; Air ; Angle measurement ; Contact angle ; Liquefied gases ; Naphthalene ; Phase interfaces ; Sodium ; Surface tension

Solid Fuels:524 ; Alkali Metals:549.1 ; Physical Chemistry:801.4 ; Chemical Operations:802.3 ; Chemical Products Generally:804 ; Organic Compounds:804.1 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Mechanical Variables Measurements:943.2

CHEMISTRY

2-s2.0-85130394219

Scopus

1.Department of Chemistry,Southern University of Science and Technology,Shenzhen,518055,China
2.Clean Energy Institute,Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,518055,China
3.Shenzhen Engineering Research Center for Coal Comprehensive Utilization (SCCCU),School of Innovation and Entrepreneurship,Southern University of Science and Technology,Shenzhen,518055,China

Hu，Shunxuan,Li，Junguo,Liu，Ke,et al. Comparative study on distribution characteristics of anionic dispersants in coal water slurry[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2022,648.

Hu，Shunxuan,Li，Junguo,Liu，Ke,&Chen，Yumeng.(2022).Comparative study on distribution characteristics of anionic dispersants in coal water slurry.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,648.

Hu，Shunxuan,et al."Comparative study on distribution characteristics of anionic dispersants in coal water slurry".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 648(2022).