Magnetic zeolites: novel nanoreactors through radiofrequency heating

García-Aguilar, Jaime; Fernández-García, Javier; Rebrov, Evgeny V.; Lees, Martin R.; Gao, Pengzhao; Cazorla‐Amorós, Diego; Berenguer-Murcia, Ángel

doi:10.1039/c7cc01138e

Cited by 21 publications

(15 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Attempts to use magnetic heating for catalysis in solution have been reported so far by the group of Kirschning, who used steel beads or iron oxide NPs as heating agents encapsulated in silica. More recently, Rebrov and co‐workers prepared modified NiFe 2 O 4 materials that were used in amide synthesis, and Berenguer‐Murcia and co‐workers prepared magnetic nanoparticles encapsulated in zeolites, which were used for the isomerization of citronellal . To the best of our knowledge, however, there are no reports in the literature on hybrid functional materials displaying high heating powers, in which the close contact between the heating agent and the catalyst makes it possible to perform high‐temperature catalysis in solution.…”

Section: Figurementioning

confidence: 99%

Hydrodeoxygenation Using Magnetic Induction: High‐Temperature Heterogeneous Catalysis in Solution

et al. 2019

View full text Add to dashboard Cite

Magnetic heating has recently been demonstrated as an efficient way to perform catalytic reactions after deposition of the heating agent and the catalyst on a support. Here we show that in solution, and under mild conditions of mean temperature and pressure, it is possible to use magnetic heating to carry out transformations that are otherwise performed heterogeneously at high pressure and/or high temperature. As a proof of concept, we chose the hydrodeoxygenation of acetophenone derivatives and of biomass‐derived molecules, namely furfural and hydroxymethylfurfural. These reactions are difficult, require heterogeneous catalysts and high pressures, and, to the best of our knowledge, have no precedent in standard solution. Here, hydrodeoxygenations are fully selective under mild conditions (3 bar H2, moderate mean temperature of the solvent). The reason for this reactivity is the fast heating of the particles well above the boiling temperature of the solvent and the local creation of hot spots surrounded by a vapor layer, in which high temperature and pressure may be present. This technology may be practicable for many organic transformations.

show abstract

Section: Figurementioning

confidence: 99%

Hydrodeoxygenation Using Magnetic Induction: High‐Temperature Heterogeneous Catalysis in Solution

et al. 2019

View full text Add to dashboard Cite

show abstract

“…As any other remote process, the energy supplied by the source is much higher than the energy converted into heating. However, if induction heating will be used for different catalysis process 7,11 , the power consume is a parameter that has to be considered.…”

Section: Discussionmentioning

confidence: 99%

“…Inductive heating of ferromagnetic materials and composites is known as a renewed topic in different research fields with many applications among which hyperthermia cancer treatment stands out [1][2][3] . However, there is currently a growing interest in applications to which this concept can be spread out, such as heterogeneous catalysis [4][5][6] , electrolysis of water 7 , new methods of organic synthesis 8,9 , molecularly imprinted polymers 10 , and others 11,12 .…”

mentioning

confidence: 99%

Colossal heating efficiency via eddy currents in amorphous microwires with nearly zero magnetostriction

Morales

Archilla

Presa

et al. 2020

Sci Rep

View full text Add to dashboard Cite

It is well stablished that heating efficiency of magnetic nanoparticles under radiofrequency fields is due to the hysteresis power losses. In the case of microwires (MWs), it is not clear at all since they undergo non-coherent reversal mechanisms that decrease the coercive field and, consequently, the heating efficiency should be much smaller than the nanoparticles. However, colossal heating efficiency has been observed in MWs with values ranging from 1000 to 2800 W/g, depending on length and number of microwires, at field as low as H = 36 Oe at f = 625 kHz. It is inferred that this colossal heating is due to the Joule effect originated by the eddy currents induced by the induction field B = M + χH parallel to longitudinal axis. This effect is observed in MWs with nearly zero magnetostrictive constant as Fe2.25Co72.75Si10B15 of 30 μm magnetic diameter and 5 mm length, a length for which the inner core domain of the MWs becomes axial. This colossal heating is reached with only 24 W of power supplied making these MWs very promising for inductive heating applications at a very low energy cost.

show abstract

“…Others have later made research into magnetic zeolites and related systems,where NiFe-based particles may also play ac atalytic role. [16,17] More recently,o thers reported iron-based core-shell NPs doped with precious metals as candidates for induction heated heterogeneous catalysis. [18,19] However,incase of SMR with reaction temperatures around 800 8 8C, iron with aC urie temperature, T C ,o f7 70 8 8Ci sn ot suitable as magnetic susceptor.…”

Section: Directheatingofmagneticnanoparticles(nps)bymagneticmentioning

confidence: 99%

Dual‐Function Cobalt–Nickel Nanoparticles Tailored for High‐Temperature Induction‐Heated Steam Methane Reforming

et al. 2018

View full text Add to dashboard Cite

The tailored chemical synthesis of binary and ternary alloy nanoparticles with a uniform elemental composition is presented. Their dual use as magnetic susceptors for induction heating and catalytic agent for steam reforming of methane to produce hydrogen at temperatures near and above 800 °C is demonstrated. The heating and catalytic performance of two chemically synthesized samples of CoNi and Cu⊂CoNi are compared and held against a traditional Ni‐based reforming catalyst. The structural, magnetic, and catalytic properties of the samples were characterized by X‐ray diffraction, elemental analysis, magnetometry, and reactivity measurements. For induction‐heated catalysts, the conversion rate of methane is limited by chemical reactivity, as opposed to the case of traditional externally heated reformers where heat transport limitations are the limiting factor. Catalyst production by the synthetic route allows controlled doping with miniscule concentrations of auxiliary metals.

show abstract

Magnetic zeolites: novel nanoreactors through radiofrequency heating

Abstract: Novel ferrite@zeolites have been synthesized and applied in citronellal isomerization under radiofrequency heating for enhanced microreactor development.

Cited by 21 publications

References 32 publications

Hydrodeoxygenation Using Magnetic Induction: High‐Temperature Heterogeneous Catalysis in Solution

Hydrodeoxygenation Using Magnetic Induction: High‐Temperature Heterogeneous Catalysis in Solution

Colossal heating efficiency via eddy currents in amorphous microwires with nearly zero magnetostriction

Dual‐Function Cobalt–Nickel Nanoparticles Tailored for High‐Temperature Induction‐Heated Steam Methane Reforming

Contact Info

Product

Resources

About