Triboelectrification in fluidized bed of polystyrene

Effects of an electrostatic field in pneumatic conveying of granular materials through inclined and vertical pipes

“…It may be expected that charges induced on a pipe wall made of a conductive material may be more easily conducted away while those induced on an insulating material may tend to be accumulated. Zhu et al (2004) have reported that the presence of electrostatic charges residing on pipe walls may have some perturbation effects on ECT measurements when low gas Glass beads (Fasso et al, 1982) Polystyrene (Wolny and Kazmierczak, 1989) Glass beads (Nieh and Nguyen, 1988) Glass beads (Nieh andNguyen, 1988) Glass beads (Nieh and Nguyen, 1988) Present work Glass beads (Nieh and Nguyen, 1988) Polystyrene (Gajewski, 1989) Polyamide (Sharmene Ali et al, 1999) 0 400 800 1200 1600 2000 2400 2800 Particle size (μm) Fig. 4.…”

“…4. Map of particle charge-to-mass ratio as a function of particle size Fasso et al, 1982;Gajewski, 1989;Nieh and Nguyen, 1988;Sharmene Ali et al, 1999;Wolny and Kazmierczak, 1989. Table 3 Charge-to-mass ratios of particles conveyed through various types of pipes (Ally and Klinzing, 1985) Pipe velocities are used.…”

Effects of external electric field on bubble and charged particle hydrodynamics in a gas–solid fluidized bed

“…It was revealed in the previous works that in some gas-solid systems, all of the particles carried charges of the same sign (unipolar charging), while in others, some particles were positively charged, and others were negatively charged (heteropolar charging) [6][7][8]. In the latter cases, particles tended to agglomerate and complicated the hydrodynamics [9].…”

Computational fluid dynamics and electrostatic modeling of polymerization fluidized-bed reactors

“…They observed that entrainment reduced with a decrease of relative humidity. Wolny and Kazmierczak [16] observed that fines are elutriated by increasing the relative humidity of the gas. Briens et al [17] conducted experiments with polyethylene particles and showed that the smallest particles are not the most easily elutriated from fluidized beds with size ranging from 69 μm catalyst particles to 400 μm polyethylene particles.…”