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首页> 外文期刊>Environmental Science & Technology >Induction and Coverage Times for Crude Oil Droplets Spreading on Air Bubbles
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Induction and Coverage Times for Crude Oil Droplets Spreading on Air Bubbles

机译：原油液滴在气泡上散布的诱导时间和覆盖时间

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摘要

The interactions between crude oil droplets and air bubbles were studied by the droplet-bubble micromanipulator technique. Eight crude oils were investigated, and some aspects of the involved mechanisms were discussed. The induction time was measured for air bubbles approaching crude oil droplets in different aqueous phases. Distinct differences were observed in the presence and absence of salts, which showed the importance of long-ranged electrostatic repulsive forces on thin-film stability. The results also suggested that adsorption of dissolved hydrocarbons at air bubble surfaces may increase the potential energy barrier in the thin liquid film. Furthermore, the time needed for crude oil droplets to spread over the air bubble surfaces (referred to as coverage time) was determined for the crude oils. The results showed that the spreading velocity decreased with increasing viscosity of the crude oil. The detailed understanding of this type of interaction is considered to be a precursor for improving the oil removal efficiency during the flotation process.
机译：通过液滴微操纵器技术研究了原油液滴与气泡之间的相互作用。研究了八种原油，并讨论了其中涉及机理的某些方面。测量了在不同水相中接近原油液滴的气泡的诱导时间。在存在和不存在盐的情况下观察到明显的差异，这表明长距离静电排斥力对薄膜稳定性的重要性。结果还表明，溶解的碳氢化合物在气泡表面的吸附可能会增加液膜中的势能垒。此外，确定了原油小滴散布在气泡表面上所需的时间（称为覆盖时间）。结果表明，随着原油粘度的增加，铺展速度降低。对这种类型相互作用的详细理解被认为是在浮选过程中提高除油效率的先驱。

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  • 来源
    《Environmental Science & Technology》 |2013年第24期|14154-14160|共7页
  • 作者

    Mona Eftekhardadkhah; Gisle Oye;

  • 作者单位

    Ugelstad Laboratory, Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), N-7491 Trondheim, Norway;

    Ugelstad Laboratory, Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), N-7491 Trondheim, Norway;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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