Study of sodium lignosulfonate prepare low-rank coal-water slurry: Experiments and simulations

Lin Li; Chuandong Ma; Mengyu Lin; Mingpu Liu; Hao Yu; Qingbiao Wang; Xiaoqiang Cao; Xiaofang You

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Study of sodium lignosulfonate prepare low-rank coal-water slurry: Experiments and simulations

Energy Science and Technology | Updated：2026-01-06

- Study of sodium lignosulfonate prepare low-rank coal-water slurry: Experiments and simulations
- Chinese Journal of Chemical Engineering Vol. 29, Issue 1, Pages: 344-353(2021)
- Affiliations：
  
  1. School of Chemistry and Biological Engineering, Shandong University of Science and Technology,Qingdao,China,266590
  2. College of Safety and Environment Engineering, Shandong University of Science and Technology,Qingdao,China,266590
  3. National Engineering Laboratory for Coalmine Backfilling Mining, Shandong University of Science and Technology,Tai'an,China,271019
  4. Department of Resource and Civil Engineering, Shandong University of Science and Technology,Tai'an,China,271019
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2021
- Accepted：
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Lin Li, Chuandong Ma, Mengyu Lin, Mingpu Liu, Hao Yu, Qingbiao Wang, Xiaoqiang Cao, Xiaofang You. Study of sodium lignosulfonate prepare low-rank coal-water slurry: Experiments and simulations[J]. Chinese Journal of Chemical Engineering, 2021, 29(1): 344-353.
DOI：

Lin Li, Chuandong Ma, Mengyu Lin, Mingpu Liu, Hao Yu, Qingbiao Wang, Xiaoqiang Cao, Xiaofang You. Study of sodium lignosulfonate prepare low-rank coal-water slurry: Experiments and simulations[J]. Chinese Journal of Chemical Engineering, 2021, 29(1): 344-353. DOI：

摘要

Abstract

The effect of sodium lignosulfonate (SL) as additive on the preparation of low-rank coal-water slurry (LCWS) was studied by experiments and molecular dynamics (MD) simulations. The experimental results show that the appropriate amount of additives is beneficial to reduce the viscosity of LCWS and increase the slurry concentration. Adsorption isotherm studies showed that SL conforms to single-layer adsorption on the coal surface

and △

ads

was negative

proving that the reaction was spontaneous. Zeta potential measurements showed that SL increased the negative charge on coal. FTIR scanning and XPS wide-range scanning were performed on the coal before and after adsorption

and it was found that the content of oxygen functional groups on coal increased after adsorption. Simulation results show that when a large number of SL molecules exist in the solution

some SL molecules will bind to hydrophobic hydrocarbon groups on coal. The rest of the SL molecules

their hydrophobic alkyl tails

come into contact with each other and aggregate in solution. The agglomeration of SL molecules and the surface of coal with static electricity will also produce electrostatic interaction

which is conducive to the even dispersion of coal particles. The results of mean square displacement (

MSD

) and self-diffusion coefficient (

) show that the addition of SL reduces the diffusion rate of water molecules. Simulation results correspond to experimental results

indicating that MD simulation is accurate and feasible.

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