Preparation of foaming agents for dust suppression of coal particles

  • Zhanar B. Ospanova al-Farabi Kazakh National University, Almaty, Kazakhstan
  • Samal Toktagul al-Farabi Kazakh National University, Almaty, Kazakhstan
  • Arukhan Tasmagambetova al-Farabi Kazakh National University, Almaty, Kazakhstan
  • Mirsalim Asadov Institute of Catalysis and Inorganic Chemistry named after Acad. M. Nagiyev of National Academy of Sciences of Azerbaijan, Baku, Azerbaijan
Keywords: foamer, coal particles, foam, foaming ability, stability, dust suppression

Abstract

The results of the study of foams stabilized by solid coal particles are given. The method of sedimentation analysis determined the most likely radius of coal particles equal to 20.28 microns. Foaming ability was determined by the height of the foam column obtained by the method of bubbling within 1 min. Foam stability was determined by the time of complete destruction of the foam column. Foams stabilized by the compositions of anionic surfactants – sodium dodecyl sulfate (DDSNa) and sulfonol (SF) with polyvinyl alcohol (PVA) in the presence of hydrophobic solid particles of coal showed greater foaming capacity and stability compared to foams from individual surfactants. The surface tension isotherms of aqueous solutions of surfactants, PVA, and their mixtures were obtained. An increase in the stability of foams in the presence of coal particles corresponds to a decrease in the surface tension at the liquid-gas interface. The stability of foams obtained from surfactant-PVA compositions is explained by the combined influence of thermodynamic (reduction of surface tension) and structural-mechanical (increase in viscosity of inter-membrane fluid) of stability factors. These properties of foams can be used to suppress dust in coal mining.

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Published
2019-09-30
How to Cite
Ospanova, Z., Toktagul, S., Tasmagambetova, A., & Asadov, M. (2019). Preparation of foaming agents for dust suppression of coal particles. Chemical Bulletin of Kazakh National University, (3), 12-18. https://doi.org/https://doi.org/10.15328/cb1071
Section
Colloid and Nano Chemistry