Preface

Hristov, Jordan; Li, Hongzhong

doi:10.1016/s1672-2515(07)00074-7

Cited by 4 publications

(3 citation statements)

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“…The coils were able to generate a homogeneous magnetic field orientated in flow direction. [34,37] To demonstrate the proof of principle of the electrochemically addressable, magnetic adsorber particle system, it was studied how well the potassium ferricyanide is reduced to potassium ferrocyanide in the magnetic fluidized bed reactor. For all experiments, a total particle amount of 3 g was used.…”

Section: Behavior Of the Conductive Adsorber Composite Supraparticlesmentioning

confidence: 99%

“…On the other hand, magnetic particles were also reported to be attractive fillers in columns for so-called magnetic fluidized beds, where an imposed upward fluid flow is imposed on the granular solid phase and in which the gravity, holding the granules down, is supported by a magnetic field. [33][34][35] State of the art adsorber particles used for water treatment in fluidized beds are in general static elements as opposed to smart, refreshable adsorber elements insofar as they only possess preset chemical properties which are mostly defined by the synthesis conditions and capacities for adsorbing a limited range of substances. As stated in the beginning, many water treatment processes are driven by electrochemical mechanisms, which principally allow for adjusting adsorption, desorption, altering/degradation of adsorbed substances.…”

Section: Introductionmentioning

confidence: 99%

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Adsorber Particles with Magnetically‐Supported Improved Electrochemical Conversion Behavior for Waste Water Treatment Processes

Schneider

Tschöpe

Hanselmann

et al. 2020

Part & Part Syst Charact

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Micron‐sized supraparticles, consisting of a plurality of discrete nano‐ and microscale functional units, are assembled and fused by means of a droplet extrusion process. By combining nano magnetite, activated carbon, and conductive carbon with a polymeric binder matrix, particles are obtained which unite good magnetic properties, electrical conductivity, and adsorber activity through the high accessible surface area of the incorporated activated carbon of about 570 m2 g−1, thereby enabling a new approach toward sustainable water treatment processes. Due to the interplay of the components, it is possible to adsorb target substances, dissolved in the water which is demonstrated by the adsorption of the model dye methylene blue. A very fast adsorption kinetic and an adsorption capacity of about 400 mg g−1 is determined. By using the developed composite particles, it is also possible to electrochemically alter substances flowing through a magnetically‐stabilized fluidized‐bed reactor by electrochemically charging/discharging, significantly supported by the magnetic field enabling alternatingly optimum mobility/adsorption phases with contact/charging intervals. The electrochemical conversion can be increased up to 151% depending on the applied flow‐rate and electrical voltage. By applying an external magnetic field, a further increase of electrochemical conversion of up to 70% can be observed.

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Section: Behavior Of the Conductive Adsorber Composite Supraparticlesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adsorber Particles with Magnetically‐Supported Improved Electrochemical Conversion Behavior for Waste Water Treatment Processes

Schneider

Tschöpe

Hanselmann

et al. 2020

Part & Part Syst Charact

View full text Add to dashboard Cite

show abstract

“…This method can not only enhance mass transfer coefficient, but also increase heat stability and half life of enzyme. However, the amount of generalized information available is relatively rare [7][8][9][10][11]. This is due to the fact that, for a given superficial gas velocity value, any variation would generate a modification in solid particle velocity and solid-holdup.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Hydrodynamic Behaviors in Gas-Solid Magnetic Fluidized Beds

Yang

2012

AMR

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A mathematical model describing the transient hydrodynamic behaviours is introduced to predict the effect of magnetic field intensity and process parameters in magnetically stable fluidized beds (MSFBs). Computational fluid dynamics (CFD) code Fluent 6.2 has been used to investigate the hydrodynamics of a gas-solid MSFB operated with fine particles. The model is incorporated into simulations based on an Eulerian approach. In the simulations, the closure models describing the hydrodynamics of the solids phase are directly affected by the behavior of magnetic field intensity. The simulations are compared with experiments at different gas Reynolds numbers (ReG = uGdp/vG) and magnetic field intensity (Er = 3μ0MpH/2gdpρp). The agreement obtained between the simulation results and experimental data for local solid holdup is good at lower ReG and Er values.

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Magnetized fluidized bed with binary admixture of magnetizable and nonmagnetizable particles

Zhu

Huang

2019

Reviews in Chemical Engineering

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Magnetic fields were used to successfully improve the fluidization quality of magnetizable particles, forming the magnetized fluidized bed (MFB). Moreover, researchers found that the binary admixture of magnetizable and nonmagnetizable particles could also be used in the MFB, creating the admixture MFB. Consequently, the MFB technique is no longer restricted to the few magnetizable particles in nature and can be extended to numerous nonmagnetizable particles. Nevertheless, research on the admixture of MFB is far from sufficient, severely hindering its commercial application in the chemical and biochemical industries. To deepen our understanding in this area, this review summarizes the relevant findings, which mainly include (1) transport phenomena in the gas-solid admixture MFB with Geldart B particles; (2) elimination of the abnormal fluidization phenomena in the gas-solid admixture MFB with Geldart C particles; (3) flow regime transition of the liquid-solid admixture MFB under both the magnetization-FIRST and magnetization-LAST operation modes; and (4) application of the pure MFB in the fields of gas filtration and coal dry separation. Finally, critical comments are made on the shortcomings of the reported research with the hope that more efforts could be devoted to these aspects in the future.

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Preface

Cited by 4 publications

References 0 publications

Adsorber Particles with Magnetically‐Supported Improved Electrochemical Conversion Behavior for Waste Water Treatment Processes

Adsorber Particles with Magnetically‐Supported Improved Electrochemical Conversion Behavior for Waste Water Treatment Processes

Numerical Investigation of Hydrodynamic Behaviors in Gas-Solid Magnetic Fluidized Beds

Magnetized fluidized bed with binary admixture of magnetizable and nonmagnetizable particles

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