Transparent silicon/glass microreactor for high-pressure and high-temperature reactions
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Date
2008-01-15
Publication Type
Conference Paper
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yes
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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 gcat- 1 mi n- 1 at ambient conditions to 0.046 mol gcat- 1 mi n- 1 at 51 bar and 71 °C. The reaction was observed to be mass transfer limited.
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published
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Volume
135 (s1)
Pages / Article No.
Publisher
Elsevier
Event
9th International Conference on Microreaction Technology (IMRET9)
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Subject
High-pressure; High-temperature; Microreactor; Microfluidic connection; Hydrogenation
Organisational unit
03348 - Rudolf von Rohr, Philipp (emeritus) / Rudolf von Rohr, Philipp (emeritus)