Wednesday, 25 April 2007 - 9:50 AM
95d

Kinetics of Hydrogen Peroxide Synthesis in a Microreactor by Direct Combination of Oxygen and Hydrogen

Yury Voloshin1, Adeniyi Lawal2, and Raghunath Halder2. (1) Department of Chemical, Biomedical and Materials Engineering, Stevens Institute of Technology, New Jersey Center for Microchemical Systems, 1 Castle Point, Hoboken, NJ 07030, (2) New Jersey Center for Microchemical Systems, Dept. of Chemical, Biomedical and Materials engineering, Stevens Institute of Technology, Castle Point, Hoboken, NJ 07030

Hydrogen peroxide was formed in a packed-bed microreactor in a three-phase process involving the direct combination (DC) of hydrogen and oxygen over a solid catalyst in the presence of a liquid solvent. Hydrogen and air were combined in all proportions, including explosive regime, over a platinum group catalyst supported on an oxide. The DC process comprises multiple reactions involving formation of hydrogen peroxide, parallel formation of water, hydrogen peroxide reduction by hydrogen, and decomposition by disproportionation. Synthesis of hydrogen peroxide was conducted at conditions where the selectivity for H2O2 was 100%, so that all reactions except for H2O2 synthesis could be neglected. A Langmuir-Hinshelwood rate expression for the synthesis of hydrogen peroxide was determined as part of a program to determine the overall kinetics of hydrogen peroxide formation.


See more of #95 - Micro Technology in Catalyzed Reaction Systems - Part I (T1003)
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