Investigation of the attachment interaction between low-rank coal particles and bubbles

ABSTRACT

Effects of hydrodynamics and surface chemistry properties on attachment interaction between low-rank coal particles and bubbles were investigated. The surfactants such as 2-ethyl hexanol, dodecyl amine hydrochloride, and sodium dodecyl sulfate were added to change the surface chemistry of low-rank coal particles. The relationship between induction time and bubble Reynolds number showed an index relationship. The induction time would become shorter while the energy barriers between particles and air bubbles are easily overcome with bubble Reynolds number increase. Therefore, the hydrodynamics and surface chemistry properties had a significant effect on the attachment interaction between low-rank coal particles and bubbles.

KEYWORDS:

• Low-rank coal
• Reynolds number
• induction time
• attachment efficiency
• XPS

Acknowledgements

This work was supported by Scientific Research Foundation for High-Level Talents from Liupanshui Normal University (Grant No. LPSSYKYJJ201811), National Natural Science Foundation of China (Grant No. 51574235, 51774284), Science and Technology Platform and Talent Team Project of Science and Technology Department of Guizhou Province ([2018]5777 and [2017]5721), Scientific and Technological Innovation Platform of Liupanshui (Grant No. 52020-2018-03-02, 52020-2017-02-02), Youth Science and Technology Talent Development Project in Education Department of Guizhou Province (Qianjiaohe KY Zi [2017]259), Liupanshui Key Laboratory of High Performance Fibers and Advanced Porous Materials (52020-2018-0202) and Science and Technology Innovation Group of Liupanshui Normol University (LPSSYKJTD201801).

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Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.

Additional information

Funding

This work was supported by Qianjiaohe KY Zi [2019]126, Scientific Research Foundation for High-Level Talents from Liupanshui Normal University (Grant No. LPSSYKYJJ201811, LPSSYKJTD201801, [2018]5777 and [2017]5721), Key Supported Discipline of Guizhou Provence (Qian Xuewei He Zi ZDXK[2016]24), Scientific and Technological Innovation Platform of Liupanshui (Grant No. 52020-2018-03-02, 52020-2017-02-02).