Microscopic mechanistic study on the removal of catalyst particles in FCCS by an electrostatic field

Li, Qiang; Li, Anmeng; Guo, Linfei; Cao, Hao; Xu, Weiwei; Wang, Zhenbo

doi:10.1016/j.powtec.2020.01.019

Cited by 10 publications

(3 citation statements)

References 19 publications

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“…They later also discussed the influence of ac frequency and suspension conductivity on the separation [86,88]. Later, Li, Guo, and co-workers studied experimentally and numerically the DEP filtration of catalyst particles from oil [143][144][145][146].…”

Section: Dep Filtrationmentioning

confidence: 99%

A review of dielectrophoretic separation and classification of non‐biological particles

Pesch

2020

Electrophoresis

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A review of dielectrophoretic separation and classification of non-biological particles Dielectrophoresis (DEP) is a selective electrokinetic particle manipulation technology that is applied for almost 100 years and currently finds most applications in biomedical research using microfluidic devices operating at moderate to low throughput. This paper reviews DEP separators capable of high-throughput operation and research addressing separation and analysis of non-biological particle systems. Apart from discussing particle polarization mechanisms, this review summarizes the early applications of DEP for dielectric sorting of minerals and lists contemporary applications in solid/liquid, liquid/liquid, and solid/air separation, for example, DEP filtration or airborne fiber length classification; the review also summarizes developments in DEP fouling suppression, gives a brief overview of electrocoalescence and addresses current problems in high-throughput DEP separation. We aim to provide inspiration for DEP application schemes outside of the biomedical sector, for example, for the recovery of precious metal from scrap or for extraction of metal from low-grade ore.

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Section: Dep Filtrationmentioning

confidence: 99%

A review of dielectrophoretic separation and classification of non‐biological particles

Pesch

2020

Electrophoresis

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“…The commonly used solid particle separation methods of SLO include filtration, sedimentation, , centrifugation, , and electrostation separation. − Guo et al separated the catalyst fines and coke powders in SLO sequentially through filtration with different solvents at selectivities of 71.0 and 96.9 wt %, respectively. It was found that solvents were critical to solid particle separation because the asphaltenes precipitated by aliphatic solvent causes the solid particles to flocculate and aggregate.…”

Section: Introductionmentioning

confidence: 99%

Agglomeration of Solid Particles in Fluidized Catalytic Cracking Slurry Oil: Particle Separation by the Oil−Water Interface and Particle Composition Analysis

et al. 2021

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Separation of solid particles in fluidized catalytic cracking slurry oil (SLO) is a tricky task because of their distinctive composition. Centrifugation and the oil–water interface method were used to separate solid particles in SLO. The results indicated that the oil–water interface method was better in particle separation. For instance, about 10 wt % fine coke powders can be separated by the oil–water interface method instead of centrifugation at the same conditions. Two different types of solid particles after ethanol/toluene extraction, i.e., catalyst fines and coke powders, were taken to investigate the composition of bulk solid particles. It was found that bulk solid particles were inborn coated by carbonaceous components rich in oxygenates and then modified by hydrogen-rich chemisorbed organics. The mechanism of particle agglomeration and separation by the oil–water interface method was proposed. Since water is cheap and accessible, this study could provide a green and efficient way for fine solid particle separation in SLO.

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“…DEP offers a simple, easily operated, inexpensive, and rapid process for classifying any dielectric particles [3,4] since the system only requires electrodes, an electric field generator, and a suspending medium. When dielectric particles are exposed to a nonuniform electric field, the induced force polarizes the particles to self-assemble as they are either attracted to or repelled by the source of the electric field [5,6]. If the particle is attracted, it is called positive DEP and negative DEP if repelled [7,8].…”

Section: Introductionmentioning

confidence: 99%

Wirelessly powered dielectrophoresis of metal oxide particles using spark‐gap Tesla coil

et al. 2020

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Wirelessly powered dielectrophoresis (DEP) of metal oxide particles was performed using a spark‐gap Tesla coil (TC). The main contribution of this work is the simplification of the conventional DEP setup that requires attaching wires directly to the electrodes. Wireless power from the TC generates a high output frequency and voltage, which corresponds to that used for the DEP. Therefore, a spark‐gap TC was built and utilized to conduct the DEP process. Metal oxides (ZnO and Fe2O3) were used as targets for the assembly. The results showed that the wirelessly powered DEP technique via a TC was successful in assembling the metal oxide particles. Positive and negative DEP phenomena were observed. Positive DEP occurred during ZnO assembly, making particles chain grow 0.92 mm toward the sparks within 60 s. Negative DEP was observed during Fe2O3 assembly, where the repulsion of particles formed a void around the sparks with a 1.45 mm radius. The mechanism of this wireless DEP system is discussed.

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Microscopic mechanistic study on the removal of catalyst particles in FCCS by an electrostatic field

Cited by 10 publications

References 19 publications

A review of dielectrophoretic separation and classification of non‐biological particles

A review of dielectrophoretic separation and classification of non‐biological particles

Agglomeration of Solid Particles in Fluidized Catalytic Cracking Slurry Oil: Particle Separation by the Oil−Water Interface and Particle Composition Analysis

Wirelessly powered dielectrophoresis of metal oxide particles using spark‐gap Tesla coil

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