Equipment and facilities

Falling film micro reactor (FFMR) with Seebeck elements

Falling film micro reactor in tempering bath (enlarged picture)

schematic set-up of FFMR with Seebeck elements (enlarged picture)

The FFMR is typically used for liquid-gas reactions. The liquid runs as a thin film (thickness in the range of several 10 µm to 100 µm) over the reaction plate. The gaseous component flows over the film, at the contact surface reaction takes place.
This reactor type is characterised by good heat removal properties and short hold-up times. Therefore the FFMR is suitable for highly exotherm reactions where also substances with a high hazardous potential (e. g. thermal unstable or toxic) can be involved.
In comparison to the conventional FFMR, where on the reverse side of the reaction plate tempering is carried out, the here installed assembly is provided with an array (4:10) of 40 Seebeck elements. Tempering is realised by dipping it into a bath.
With the Seebeck elements temperatures and derived heat flows can be measured over the surface of the reaction plate.
This test assembly enables a fast screening of parameter variations by tracking changes in heat flow signal. Thermo kinetic information can be obtained by change of temperature or concentration.

Technical Data

Apparatus: micro falling film reactor, developed by Fraunhofer ICT Pfinztal based on FFR of Institut für Mikrotechnik Mainz (IMM)
Temperature range: up to 180 °C (IMM catalogue)
Pressure range: up to 10 bar
Reactor dimension (l x w x h): (120 x 76 x 40) mm
Channel geometry: (600 x 600 µm) (reaction plate with 32 channels)

BAM Equipment and facilities | Chemical Process Safety

2012-01-24

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