scholarly journals Induction Heating in Nanoparticle Impregnated Zeolite

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4013
Author(s):  
Irene Morales ◽  
Marta Muñoz ◽  
Catia S. Costa ◽  
Jose Maria Alonso ◽  
João Miguel Silva ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Induction Heating ◽  
Colloidal Suspension ◽  
Added Value ◽  
Solid Matrix ◽  
Inductive Heating ◽  
Usy Zeolite ◽  
Heating Efficiency ◽  
Heterogeneous Catalytic ◽  
Fe2o3 Nanoparticle

The ultra-stable Y (H-USY) zeolite is used as catalyst for the conversion of plastic feedstocks into high added value products through catalytic cracking technologies. However, the energy requirements associated with these processes are still high. On the other hand, induction heating by magnetic nanoparticles has been exploited for different applications such as cancer treatment by magnetic hyperthermia, improving of water electrolysis and many other heterogeneous catalytic processes. In this work, the heating efficiency of γ-Fe2O3 nanoparticle impregnated zeolites is investigated in order to determine the potential application of this system in catalytic reactions promoted by acid catalyst centers under inductive heating. The γ-Fe2O3 nanoparticle impregnated zeolite has been investigated by X-ray diffraction, electron microscopy, ammonia temperature program desorption (NH3-TPD), H2 absorption, thermogravimetry and dc and ac-magnetometry. It is observed that the diffusion of the magnetic nanoparticles in the pores of the zeolite is possible due to a combined micro and mesoporous structure and, even when fixed in a solid matrix, they are capable of releasing heat as efficiently as in a colloidal suspension. This opens up the possibility of exploring the application at higher temperatures.

scholarly journals Local Induction Heating Capabilities of Zeolites Charged with Metal and Oxide MNPs for Application in HDPE Hydrocracking: A Proof of Concept

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1029
Author(s):  
Marta Muñoz ◽  
Irene Morales ◽  
Cátia S. Costa ◽  
Marta Multigner ◽  
Patricia de la Presa ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Radio Frequency ◽  
Induction Heating ◽  
Catalytic Cracking ◽  
Hydrogen Atmosphere ◽  
Oil Refining ◽  
Proof Of Concept ◽  
Usy Zeolite ◽  
Additional Energy ◽  
Active Centre

Zeolites are widely used in high-temperature oil refining processes such as fluid catalytic cracking (FCC), hydrocracking, and aromatization. Significant energy cost are associated with these processes due to the high temperatures required. The induction heating promoted by magnetic nanoparticles (MNPs) under radio frequency fields could contribute to solving this problem by providing a supplementary amount of heat in a nano-localized way, just at the active centre site where the catalytic process takes place. In this study, the potential of such a complementary route to reducing energetic requirements is evaluated. The catalytic cracking reaction under a hydrogen atmosphere (hydrocracking) applied to the conversion of plastics was taken as an application example. Thus, a commercial zeolite catalyst (H-USY) was impregnated with three different magnetic nanoparticles: nickel (Ni), cobalt (Co), maghemite (γ-Fe2O3), and their combinations and subjected to electromagnetic fields. Temperature increases of approximately 80 °C were measured for H-USY zeolite impregnated with γ-Fe2O3 and Ni-γ-Fe2O3 due to the heat released under the radio frequency fields. The potential of the resulting MNPs derived catalyst for HDPE (high-density polyethylene) conversion was also evaluated by thermogravimetric analysis (TGA) under hydrogen atmosphere. This study is a proof of concept to show that induction heating could be used in combination with traditional resistive heating as an additional energy supplier, thereby providing an interesting alternative in line with a greener technology.

scholarly journals Inductive Thermal Effect of Ferrite Magnetic Nanoparticles

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3208 ◽  
Author(s):  
Jeotikanta Mohapatra ◽  
Meiying Xing ◽  
J. Ping Liu
Keyword(s):  
Magnetic Properties ◽  
Magnetic Nanoparticles ◽  
Spinel Ferrite ◽  
Particle Interactions ◽  
Heat Induction ◽  
Heating Efficiency ◽  
Magnetic Parameters ◽  
Thermally Activated ◽  
Cell Functions ◽  
Magnetic Heating

Localized heat induction using magnetic nanoparticles under an alternating magnetic field is an emerging technology applied in areas including, cancer treatment, thermally activated drug release and remote activation of cell functions. To enhance the induction heating efficiency of magnetic nanoparticles, the intrinsic and extrinsic magnetic parameters influencing the heating efficiency of magnetic nanoparticles should be effectively engineered. This review covers the recent progress in the optimization of magnetic properties of spinel ferrite nanoparticles for efficient heat induction. The key materials factors for efficient magnetic heating including size, shape, composition, inter/intra particle interactions are systematically discussed, from the growth mechanism, process control to chemical and magnetic properties manipulation.

scholarly journals Role of zinc substitution in magnetic hyperthermia properties of magnetite nanoparticles: interplay between intrinsic properties and dipolar interactions

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Yaser Hadadian ◽  
Ana Paula Ramos ◽  
Theo Z. Pavan
Keyword(s):  
Magnetic Nanoparticles ◽  
Magnetite Nanoparticles ◽  
Linear Response Theory ◽  
Magnetic Hyperthermia ◽  
Superior Performance ◽  
Dipolar Interactions ◽  
Intrinsic Properties ◽  
Specific Loss ◽  
Heating Efficiency ◽  
Specific Loss Power

AbstractOptimizing the intrinsic properties of magnetic nanoparticles for magnetic hyperthermia is of considerable concern. In addition, the heating efficiency of the nanoparticles can be substantially influenced by dipolar interactions. Since adequate control of the intrinsic properties of magnetic nanoparticles is not straightforward, experimentally studying the complex interplay between these properties and dipolar interactions affecting the specific loss power can be challenging. Substituting zinc in magnetite structure is considered as an elegant approach to tune its properties. Here, we present experimental and numerical simulation results of magnetic hyperthermia studies using a series of zinc-substituted magnetite nanoparticles (ZnxFe1-xFe2O4, x = 0.0, 0.1, 0.2, 0.3 and 0.4). All experiments were conducted in linear regime and the results were inferred based on the numerical simulations conducted in the framework of the linear response theory. The results showed that depending on the nanoparticles intrinsic properties, interparticle interactions can have different effects on the specific loss power. When dipolar interactions were strong enough to affect the heating efficiency, the parameter σ = KeffV/kBT (Keff is the effective anisotropy and V the volume of the particles) determined the type of the effect. Finally, the sample x = 0.1 showed a superior performance with a relatively high intrinsic loss power 5.4 nHm2kg−1.

Curing of a Bisphenol E Based Cyanate Ester Using Magnetic Nanoparticles as an Internal Heat Source through Induction Heating

2013 ◽  
Vol 5 (21) ◽  
pp. 11329-11335 ◽  
Author(s):  
Jeremiah W. Hubbard ◽  
François Orange ◽  
Maxime J.-F. Guinel ◽  
Andrew J. Guenthner ◽  
Joseph M. Mabry ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Heat Source ◽  
Induction Heating ◽  
Internal Heat ◽  
Internal Heat Source ◽  
Cyanate Ester

BIREFRINGENCE AND MAGNETO-OPTICAL PROPERTIES IN OLEIC ACID COATED Fe3O4 NANOPARTICLES: APPLICATION FOR OPTICAL SWITCH

2011 ◽  
Vol 10 (03) ◽  
pp. 515-520 ◽  
Author(s):  
SI-HUA XIA ◽  
JUN WANG ◽  
ZHANG-XIAN LU ◽  
FEIYAN ZHANG
Keyword(s):  
Magnetic Field ◽  
Optical Properties ◽  
Oleic Acid ◽  
Magnetic Nanoparticles ◽  
Magnetic Nanoparticle ◽  
Optical Switch ◽  
Colloidal Suspension ◽  
Experimental Parameters ◽  
Nanoparticle Chains ◽  
The Magnetic Field

We report magneto-optical properties in a kerosene colloidal suspension of oleic acid coated Fe3O4 nanoparticles (~14 nm). The magnetic colloids (fluids) show birefringence under a magnetic field. Systematical studies of the on–off switch times upon application of the on–off magnetic field with varied experimental parameters indicate that the switch response time depends strongly on the strength of the magnetic field and the concentration of the magnetic nanoparticles in the fluid. The data can be explained in terms of the formation of magnetic nanoparticle chains under a magnetic field. The important magneto-optical properties of the magnetic fluids allow us to design a tunable optical switch.

Heating efficiency of magnetic nanoparticles decreases with gradual immobilization in hydrogels

2019 ◽  
Vol 471 ◽  
pp. 486-494 ◽  
Author(s):  
Ulrich M. Engelmann ◽  
Julian Seifert ◽  
Benedikt Mues ◽  
Stefan Roitsch ◽  
Christine Ménager ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Heating Efficiency

scholarly journals Experimental and numerical study of the effect of coil structure on induction nitriding temperature field

2020 ◽  
Vol 12 (7) ◽  
pp. 168781402093848
Author(s):  
Kangjie Song ◽  
Jing Guan ◽  
Kunmao Li ◽  
Jing Liu
Keyword(s):  
Temperature Field ◽  
Temperature Distribution ◽  
Induction Heating ◽  
Current Density ◽  
Numerical Study ◽  
Radial Temperature ◽  
Current Frequency ◽  
Variable Pitch ◽  
Variable Radius ◽  
Heating Efficiency

The axial and radial temperature distributions of an induction heating workpiece considerably impact the subsequent nitriding process. To obtain a satisfactory temperature distribution, an equal pitch coil, a variable pitch coil, and a variable radius coil were designed. Furthermore, an induction heating model that exhibits electromagnetic and temperature field coupling was established; thus, the effects of the current density and frequency on the heating efficiency and temperature distribution of the workpiece were analyzed and compared. In addition, an induction heating experiment was conducted to verify the model. According to the numerical results, the variable radius coil can reduce the axial temperature difference in comparison with equal pitch coil and variable pitch coil. Hence, the workpiece heated using the variable radius coil can achieve a better temperature distribution when compared with those heated by the equal pitch coil and variable pitch coil, with appropriate current density and current frequency values.

Temperature-dependent heating efficiency of magnetic nanoparticles for applications in precision nanomedicine

Nanoscale ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 6360-6377 ◽  
Author(s):  
Gabriele Barrera ◽  
Paolo Allia ◽  
Paola Tiberto
Keyword(s):  
Magnetic Properties ◽  
Magnetic Nanoparticles ◽  
Temperature Dependent ◽  
Driving Field ◽  
Heating Efficiency

The power released by magnetic nanoparticles submitted to an alternating driving field is temperature dependent owing to the variation of the fundamental magnetic properties.

scholarly journals Hybrid magnetic nanoparticles as efficient nanoheaters in biomedical applications

2021 ◽  
Vol 3 (4) ◽  
pp. 867-888
Author(s):  
Gabriel C. Lavorato ◽  
Raja Das ◽  
Javier Alonso Masa ◽  
Manh-Huong Phan ◽  
Hariharan Srikanth
Keyword(s):  
Magnetic Nanoparticles ◽  
Biomedical Applications ◽  
The Novel ◽  
Heating Efficiency ◽  
Synthesis Routes

In this minireview we discuss and provide a perspective on the novel systems, the synthesis routes and the interface-mediated properties that determine the heating efficiency of hybrid magnetic nanoparticles.

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