Discrete element modeling of electrostatic charging of polyethylene powder particles

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F17%3A43914170" target="_blank" >RIV/60461373:22340/17:43914170 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.elstat.2017.04.008" target="_blank" >http://dx.doi.org/10.1016/j.elstat.2017.04.008</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.elstat.2017.04.008" target="_blank" >10.1016/j.elstat.2017.04.008</a>

Result language

angličtina

Original language name

Discrete element modeling of electrostatic charging of polyethylene powder particles

Original language description

The contacts of particles with a device wall as well as mutual particle collisions cause the redistribution of charge in systems with powder particles. This, usually undesirable phenomenon known as tribo-electric charging, leads to operational problems and safety risks in industrial systems, e.g., in fluidized bed polymerization reactors. We focus on the charging of polyethylene powder particles caused by the particle-particle interactions. Our model utilizes the Discrete Element Method (DEM) for the description of the particle motion and involves the balance of transferable charged species to quantify the tribo-electric charging of particles in contact. The model predicts the charging dynamics of polyethylene powder particles in systems of various particle size distributions (PSD) and addresses the influence of segregation of particles on charging. Our simulation results are in agreement with two general trends in charging that are often observed in both industrial and naturally-occurring particulate systems: (i) Charging is most pronounced in systems with wide PSD and (ii) small particles charge mostly negatively, whereas big particles typically carry positive charge. Subsequently, our results suggest that particle segregation plays an important role in the charging dynamics of particulate systems, as segregation of particles of different sizes can alter PSD locally. It is important to include electrostatic forces in charging models, especially in systems that exhibit significant charging. Specifically, electrostatic attraction among unlike charged particles leads to the &apos;orbiting motion&apos; of particles that is followed by the formation of particle aggregates.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20401 - Chemical engineering (plants, products)

Project

<a href="/en/project/GA16-07898S" target="_blank" >GA16-07898S: Agglomeration of polyolefin particles investigated at meso-scale</a><br>

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Electrostatics

ISSN

0304-3886

e-ISSN

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Volume of the periodical

87

Issue of the periodical within the volume

Neuveden

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

8

Pages from-to

150-157

UT code for WoS article

000405762900016

EID of the result in the Scopus database

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