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Publication Date:
October 2007
ISSN:
1542-6580
DOI:
10.2202/1542-6580.1463

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New Journal at De Gruyter!

Ed. by de Lasa, Hugo / Xu, Charles

1 Issue per year

Increased IMPACT FACTOR 2011: 0.790

 

Scale-up of Process Intensifying Falling Film Microreactors to Pilot Production Scale

Bhanu Kiran Vankayala1 / Patrick Löb2 / Volker Hessel3 / Gabriele Menges4 / Christian Hofmann5 / Daniel Metzke6 / Ulrich Krtschil7 / Hans-Joachim Kost8

1Institut für Mikrotechnik Mainz GmbH, Bhanu.Vankayala@avt.rwth-aachen.de

2Institut für Mikrotechnik Mainz GmbH, Loeb@imm-mainz.de

3Institut für Mikrotechnik Mainz GmbH, hessel@imm-mainz.de

4Institut für Mikrotechnik Mainz GmbH, menges@imm-mainz.de

5Institut für Mikrotechnik Mainz GmbH, hofmann@imm-mainz.de

6Institut für Mikrotechnik Mainz GmbH, metzke@imm-mainz.de

7Institut für Mikrotechnik Mainz GmbH, krtschil@imm-mainz.de

8Institut für Mikrotechnik Mainz GmbH, hkost@imm-mainz.de

Citation Information: International Journal of Chemical Reactor Engineering. Volume 5, Issue 1, Pages –, ISSN (Online) 1542-6580, DOI: 10.2202/1542-6580.1463, October 2007

Publication History:
Published Online:
2007-10-31

Microstructured reactors with their benefits especially concerning enhanced mass and heat transfer represent a means for process intensification. A broadly used microstructured lab tool in the area of gas/liquid contacting is the Falling Film Microreactor (FFMR) developed by IMM in which liquid films of a few tens of micrometer thickness and interfacial areas of up to 20,000 m2/m3 combined with an effective heat exchange can be obtained. Now the concept of the Falling Film Microreactor has been developed further with regard to increasing throughput in order to reach pilot production level and as a basis for future production scale throughput. Therefore, two different prototypes with a tenfold larger structured surface area have been developed and realized. The feasibility of a corresponding increase of throughput has been demonstrated for the oxidation of an organic compound using oxygen which is closely linked to an industrial relevant reaction and additionally by the absorption of CO2 in an aqueous sodium hydroxide solution. Naturally, process optimisation itself also contributes to the efforts to increase throughput. Therefore, the oxidation reaction has been optimised in both varying process parameters (temperature, flow rates, pressure) and reactor parameters (microchannel width and depth) in the original, standard Falling Film Microreactor. Conducting experiments at 10 bar instead of ambient pressure and using a reaction plate with 1200 µm x 400 µm channels instead of 600 µm x 200 µm channels lead to an increase in conversion. These investigations also encourage exploring more challenging process conditions and thereby following the concept of "novel chemistry."

Keywords: falling film microreactor; process intensification; scale-up and gas/liquid reactions

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