Generation of bipolar electric fields during industrial handling of powders

Inculet, I.I.; Castle, G.S.P.; Aartsen, Gerrit

doi:10.1016/j.ces.2005.05.005

Cited by 68 publications

(51 citation statements)

References 10 publications

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“…Even if the exact mechanism for this process is still not clearly understood, some experiments and observations show that this process is size dependent (Freier 1960;Inculet et al 2006;Duff and Lacks 2008;Lowell and Truscott 1986;Kok and Renno 2008;Desch and Cuzzi 2000;Forward et al 2009;Gill 1948;Latham 1964;Latham and Stow 1968;Harper 1967;Horn et al 1993;Lacks and Levandovsky 2007). Considering that, in general, the smallest particles are transported higher into the atmosphere by local turbulence while larger particles remain closer to the surface, this translates in a charge separation and consequently in an enhancement of the atmospheric electric field.…”

Section: Other Terrestrial Dust Devil Observationsmentioning

confidence: 99%

Field Measurements of Terrestrial and Martian Dust Devils

Murphy¹,

Steakley²,

Balme³

et al. 2017

Space Sciences Series of ISSI

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Section: Other Terrestrial Dust Devil Observationsmentioning

confidence: 99%

Field Measurements of Terrestrial and Martian Dust Devils

Murphy¹,

Steakley²,

Balme³

et al. 2017

Space Sciences Series of ISSI

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show abstract

“…The size-dependence of particle triboelectrification is observed in both natural phenomena [10,65] and industrial processes [11,66], which gives it priority in research fields and for which many modeling studies have been conducted [9,67,68].…”

Section: Particle Sizementioning

confidence: 99%

Fundamental theories and basic principles of triboelectric effect: A review

2018

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Long-term observation of the triboelectric effect has not only proved the feasibility of many novel and useful tribo-devices (e.g., triboelectric nanogenerators), but also constantly motivated the exploration of its mysterious nature. In the pursuit of a comprehensive understanding of how the triboelectric process works, a more accurate description of the triboelectric effect and its related parameters and factors is urgently required. This review critically goes through the fundamental theories and basic principles governing the triboelectric process. By investigating the difference between each charging media, the electron, ion, and material transfer is discussed and the theoretical deduction in the past decades is provided. With the information from the triboelectric series, interesting phenomena including cyclic triboelectric sequence and asymmetric triboelectrification are precisely analyzed. Then, the interaction between the tribo-system and its operational environment is analyzed, and a fundamental description of its effects on the triboelectric process and results is summarized. In brief, this review is expected to provide a strong understanding of the triboelectric effect in a more rigorous mathematical and physical sense.

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“…It is expected that finer fraction should possess higher surface energy than coarser fraction because of several unsaturated bonds on the surface as the particle size decreases. Inculet et al [22] observed increasing surface energy as the particle size decreases. Lower surface energy for finer size fraction than coarser fraction after tribocharging with Al, brass and copper is observed.…”

Section: Materials With Increasing Order Of Work Functionmentioning

confidence: 99%

Characterising Electron Transfer Mechanism in Tribo-Electrification of Pyrite Through Contact Angle Measurements

Dwari¹,

Rao²

2008

TOMPJ

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Abstract:Coal beneficiation by tribo-electrostatic method depends on tribo-charging attributes of coal and ash forming minerals. The tribo-electrification behaviour of pyrite mineral contacted with different materials has been investigated through charge measurements and the charge acquisition is probed through surface energy calculations from liquid contact angle data. Liquid contact angle on pyrite powder after tribo-electrification is determined by Krüss tensiometer using Washburn's equation. The sample holder in tensiometer is specially fabricated with different materials serving the purpose of tribo-electrification and contact angle measurement. The acid and base parameters of pyrite surface determined with van Oss acid-base approach using liquid contact angle data after tribo-electrification with different materials revealed the charging phenomena and electron transfer mechanism. The results showed an explicit correlation between the charge generated by pyrite powder and surface acceptor (acid)-donor (base) electronic state underlying the work functions of contacting surfaces. Thus a method for characterising the changes in surface energetic structure of solids during contact electrification in terms of surface acid-base parameters has been illustrated for the first time.

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Generation of bipolar electric fields during industrial handling of powders

Cited by 68 publications

References 10 publications

Field Measurements of Terrestrial and Martian Dust Devils

Field Measurements of Terrestrial and Martian Dust Devils

Fundamental theories and basic principles of triboelectric effect: A review

Characterising Electron Transfer Mechanism in Tribo-Electrification of Pyrite Through Contact Angle Measurements

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