On the effect of resonant microwave fields on temperature distribution in time and space

Sturm, Guido; Verweij, Martin D.; Gerven, Tom Van; Stankiewicz, Andrzej; Stefanidis, Georgios D.

doi:10.1016/j.ijheatmasstransfer.2012.02.065

Cited by 93 publications

(93 citation statements)

References 13 publications

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“…During microwave irradiation this phenomenon is practically absent since the bulk solvent is being heated and the vessel surface should have a temperature lower than the observed at the reaction mixture ( Fig. 1.7) [40].…”

Section: Specific Microwave Effectsmentioning

confidence: 93%

“…This type of acceleration reaction is devoted to a direct interaction of the electric field with specific molecules in the reaction medium. Some authors defend that the presence of an electric field leads to orientation effects of dipolar Adapted with permission from [40]. Copyright © 2012, Elsevier molecules and hence changes the pre-exponential factor A or the activation energy (entropy term) in the Arrhenius equation [41][42][43].…”

Section: Non-thermal (Athermal) Microwave Effectsmentioning

confidence: 99%

See 1 more Smart Citation

Theoretical Aspects of Microwave Irradiation Practices

Souza

2014

Production of Biofuels and Chemicals With Microwave

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In the field of organic chemistry, microwave irradiation proved to be a powerful method to enhance chemical processes. In many instances, the use of sealed-vessel high-temperature microwave processing was able to dramatically reduce reaction times, consume less solvent, increase yields, reduce side reactions and improve reproducibility. Microwaves are known to be a more efficient heating method than traditional thermal process where reactions that require long reflux times can sometimes be carried out in a few hours or minutes in a dedicated microwave irradiation equipment.

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Section: Specific Microwave Effectsmentioning

confidence: 93%

Section: Non-thermal (Athermal) Microwave Effectsmentioning

confidence: 99%

Theoretical Aspects of Microwave Irradiation Practices

Souza

2014

Production of Biofuels and Chemicals With Microwave

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“…They certainly have their limitations, though. The work in our group (Sturm et al 2012(Sturm et al , 2013b(Sturm et al , 2014 has shown that the microwave field spatially distributes nonuniformly in complex interference patterns with a high sensitivity to parametric variations. As such, the main disadvantages of off-the-shelf resonant microwave cavity systems are listed as follows.…”

Section: Challenges and New Concepts In Design And Scale-up Of Microwmentioning

confidence: 99%

“…The interference that occurs in the microwave field of constructively and destructively combining waves causes the electromagnetic activation to be distributed nonuniformly in patterns that are difficult to predict and control (Chow Ting Chan and Reader 2000, Sturm et al 2012). An alternative approach is presented here, which is based on the use of traveling electromagnetic waves as opposed to standing electromagnetic waves as an unconventional means of thermochemical activation.…”

Section: Coaxial Traveling Microwave Reactormentioning

confidence: 99%

A helicopter view of microwave application to chemical processes: reactions, separations, and equipment concepts

Stefanidis

Muñoz

Sturm

et al. 2014

Reviews in Chemical Engineering

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100

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We present a helicopter view of microwave technology application to various reaction and separation processes, including liquid-phase organic syntheses, gas-solid catalytic reactions, polymerizations, extraction, distillation, crystallization, membrane separation, and adsorbent regeneration/dehydration. The overarching aim is to demonstrate the breadth of potential applications of microwave technology to chemical industry, with particular attention to separations, as this is a less explored microwave application area. In this context, some key findings, opinions, and developments in the relevant literature are summarized. In addition, the present microwave equipment concepts for chemical processes are critically reviewed and new ones are put forward, as we believe that an important milestone in the road from laboratory-scale microwave experimentation to industrial-scale microwave-assisted chemical processing is the design and development of innovative microwave equipment concepts tailored for specific chemical processes.

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“…Then, it raises an interesting issue, that is, whether the multiple-slot antenna is even more conformal for MWA of spherical liver tumors. Based on the research of microwave heating and hyperthermia mechanism [32][33][34][35][36][37][38][39][40][41][42] and the analysis of coaxial antenna with periodic slots [43][44][45][46], a series of novel coaxial antennas with multiple slots are designed for tumor conformal treatment in this study.…”

Section: Introductionmentioning

confidence: 99%