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Evaluation of multiphase microreactors for the direct formation of hydrogen peroxide

Paper ID Volume ID Publish Year Pages File Format Full-Text
44131 46004 2007 8 PDF Available
Title
Evaluation of multiphase microreactors for the direct formation of hydrogen peroxide
Abstract

The direct production of hydrogen peroxide from H2 and O2 has been investigated in two types of microreactors: (1) a single-channel microreactor with a washcoat of catalyst and (2) a multichannel microreactor with eight parallel channels, where the catalyst was grown as a thin film. The multichannel microreactor mimics features of a monolith reactor, where the catalyst is contained in a structured honeycomb. The Taylor (slug) flow in a microchannel reactor under three phase (gas–liquid–solid) conditions enhances the mass transfer over the phase boundaries. The influence of liquid and gas flow rate, pressure drop, solvents, support materials and metal dispersion on the reaction were investigated in order to screen for optimal operation conditions. The productivity in the microchannel reactors increases approximately with the square root of the liquid flow rate, verifying the Taylor-flow model.

Graphical abstractThe formation of hydrogen peroxide by the direct reaction of hydrogen and oxygen in a microchannel reactor requires the presence of a catalyst and a liquid phase. The mass transport in this three-phase system is greatly enhanced under the prevailing Taylor flow conditions. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Hydrogen peroxide; Microreactor; Heterogeneous catalysis; Multi-phase flow; Taylor flow; Pd–Pt bimetallic catalysts
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Evaluation of multiphase microreactors for the direct formation of hydrogen peroxide
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 317, Issue 2, 7 February 2007, Pages 258–265
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us