Synergistic influence of noncationic surfactants on the wettability and functional groups of coal

To improve the wettability of coal, a combination of nonionic and anionic surfactants was used to improve the dust removal efficiency of water spray. The sedimentation test shows that the dust suppressant solution prepared by SDBS, DSS and CDEA has a good wetting effect on coal dust. The results sho...

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Bibliographic Details
Published in:Powder technology 2021-06, Vol.385, p.92-105
Main Authors: Shi, Guoqing, Qi, Jiamin, Wang, Yanming, Shen, Haoyang
Format: Article
Language:English
Subjects:
Coal
Coal dust
Correlation analysis
Dust
Dust control
FTIR
Functional group
Functional groups
Liquid-solid interfaces
Pollutants
Sedimentation
Sedimentation & deposition
Surfactant
Surfactants
Water sprays
Wettability
Wetting
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Summary:To improve the wettability of coal, a combination of nonionic and anionic surfactants was used to improve the dust removal efficiency of water spray. The sedimentation test shows that the dust suppressant solution prepared by SDBS, DSS and CDEA has a good wetting effect on coal dust. The results show that the effect of a SDBS:DSS:CDEA ratio of 3:1:12 on the wettability of coal is stronger than that of other allocation methods. FTIR was used to explore the changes in the functional groups of experimental coal samples treated with different concentrations of new dust suppressants. With the FTIR results, a correlation analysis between sedimentation time and functional groups was carried out. In addition, the mechanism of the gas-liquid interface and solid-liquid interface in the coal dust adsorption process was analysed. [Display omitted] •The configuration of a new noncationic surfactant was discussed.•The relationship between functional group and sedimentation time was discussed.•The interfacial adsorption layer of noncationic surfactant was analyzed.
ISSN:0032-5910
1873-328X
DOI:10.1016/j.powtec.2021.02.056