ON THE APPLICATION OF ELECTROMAGNETIC FIELDS IN MICROSTRUCTURED SYSTEMS

rawfrogpondUrban and Civil

Nov 16, 2013 (3 years and 10 months ago)

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ON THE APPLICATION O
F ELECTROMAGNETIC FI
ELDS IN
MICROSTRUCTURED SYST
EMS


Guido Sturm
1
; Tom van Gerven
1
; Martin Verweij
2
, Andrzej Stankiewicz
1

1
Process & Energy Department, Delft University of technology, Leeghwaterstraat 44, 2628
CA Delft, The Netherlands


2
Laboratory of Electromagnetic Research
,
Delft University of technology,
Mekelweg 4, 2628
CD
Delft, The Netherlands

e
-
mail: G.S.J.Sturm@tudelft.nl; T.D.T.vanGerven@tudelft.nl; M.D.Verweij@tudelft.nl;
A.I.Stankiewicz@tudelft.nl;



Abstract


Microstructure
d systems and microwave heating are among the most investigated research
topics in the field of process intensification. Both these technologies grant us many new
possibilities on their own and combining them could result in even greater potential. Such
co
mbined systems could have a significantly increased heat and mass transfer along with fast
and selective heating. This research intends to develop reactor systems that take advantage of
the characteristics of both technologies.


Until now research into mic
rowave enhanced chemical synthesis had limited attention for the
fundamental electromagnetic interactions involved. As a result many observed phenomena are
not fully understood. This research takes fundamental electromagnetic theory as a starting
point.

A
dequate types of systems are selected to transfer microwave energy into microstructured
reactor systems. The types considered include cavity and waveguide systems commonly used
in chemical synthesis, but they are not limited to those.


Field shaping techn
iques can be used to focus microwave fields locally. By using materials of
high and low permittivity


e.g. TiO
2

and PTFE, respectively


positioned in the optimal
geometry, electric fields can be concentrated on desired locations. This could give local he
at
generation of a higher magnitude compared to the employment of selective absorption on its
own.

Simulations in Comsol 3.3 have shown possibilities to focus the electric field on
microchannels. Optimisation and experimental validation will be performed i
n a subsequent
stage.