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Aqueous-Phase Photo-oxidation of Hydrocarbons


photo of a thin-film reactor

Liquid Phase Photocatalytic Oxidation


Thin-Film Falling Reactor

Liquid phase reaction are studied using a batch micro photocatalytic reactor and a larger scale thin-film falling reactor. This continuously stirred recycle reactor employs a more powerful lamp (400W), a larger volume and the ability to work at elevated pressures. By altering the reactor configuration from standing batch to a continuously stirred falling film reactor it is anticipated higher conversions and selectivities to partial oxygenates, increased quantum efficiency and selective product distributions can be obtained, with respect to results obtained in the previously researched batch reactor. Current investigations are centered on the process variables: substrate type, catalyst and substrate concentration, reaction and contact times, metering pump speed, and oxygen concentration. These studies are being conducted in an effort to identify the optimum process conditions for the selective partial oxidation of saturated hydrocarbons at or near ambient conditions. Further research will be focused on the use of support catalysts, co-catalyst enhancement and the exploration of gas-phase substrate oxidation.

Contact Information:

Primary Investigators:

Dr. E. Sahle-Demessie
(513) 569-7739
sahle-demessie.endalkachew@epa.gov

Dr. Michael Gonzalez
(513) 569-7998
gonzalez.michael@epa.gov

Fax: (513) 569-7677
Postal Address:
26 West Martin Luther King Drive
Mail Stop 443
Cincinnati, Ohio 45268

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