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Transparent silicon/glass microreactor for high-pressure and high-temperature reactions
- Source :
- Chemical Engineering Journal. 135:S309-S316
- Publication Year :
- 2008
- Publisher :
- Elsevier BV, 2008.
-
Abstract
- To increase mass transfer in solid catalyzed gas–liquid hydrogenations, the reactions are often operated at high pressures. Silicon/glass microreactors present a possibility to safely handle high-pressure and provide optical access into the reaction channel for flow investigations. In this study we present a Si/glass microreactor with soldered microfluidic connections for high-pressure and high-temperature applications. Mechanical testing of the device by tensile and pressure tests showed no failure for continuous operation at 140 bar and 80 °C. The improved microreactor design is applied for a well-described solid catalyzed exothermic hydrogenation at operating conditions up to 51 bar and 71 °C. Additionally the two-phase gas–liquid flow is investigated in the microreactor. Results clearly indicated the improvement of the reaction rate from 0.004 mol g cat − 1 mi n − 1 at ambient conditions to 0.046 mol g cat − 1 mi n − 1 at 51 bar and 71 °C. The reaction was observed to be mass transfer limited.
- Subjects :
- Exothermic reaction
Silicon
Continuous operation
Chemistry
General Chemical Engineering
Thermodynamics
chemistry.chemical_element
General Chemistry
Industrial and Manufacturing Engineering
Catalysis
Reaction rate
Chemical engineering
Mass transfer
Environmental Chemistry
Two-phase flow
Microreactor
Subjects
Details
- ISSN :
- 13858947
- Volume :
- 135
- Database :
- OpenAIRE
- Journal :
- Chemical Engineering Journal
- Accession number :
- edsair.doi...........3189521db053357693663a35105af16b