Experimental investigation of gaseous reactive flows around catalytically coated micro-wires

Kowtilya Bijjula, Dimitrios C. Kyritsis, Subir Roychoudhury

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Recent developments in the field of meso-scale burners have highlighted the advantages of catalytic heterogeneous combustion for compact, autonomous power generation. With this perspective, the reactive flow around catalytically coated cylinders in the regime of Reynolds and Peclet numbers that are relevant to such smallscale devices, was investigated experimentally. Preliminary experimental results of premixed methane-air flows over a catalytically coated wire are presented. The configuration under investigation here consists of a metallic cylinder of 0.6mm diameter coated with Pt on an alumina washcoat. Methane combustion was established on the surface of the catalyst by placing it in the outlet flow of a pre-heater that controlled temperature, composition and velocity of the methane-air pre-mixture. The flow was maintained at Reynolds numbers in the 11-24 range which have been shown to be appropriate values for gaseous flows in small-scale power generation. The temperature of the catalytic wire was measured with a thermocouple welded to the support metal of the wire. Gas chromatography analysis/mass spectroscopy of major combustion species was performed at various points along the flow, downstream of the catalytic wire. Both the temperature and the measured concentration values of methane and CO follow a non-monotonic trend. This indicates the importance of diffusive/convective transport in addition to catalytic chemistry in this reactive flow.

Original languageBritish English
Title of host publication5th US Combustion Meeting 2007
PublisherCombustion Institute
Number of pages6
ISBN (Electronic)9781604238112
StatePublished - 2007
Event5th US Combustion Meeting 2007 - San Diego, United States
Duration: 25 Mar 200728 Mar 2007

Publication series

Name5th US Combustion Meeting 2007


Conference5th US Combustion Meeting 2007
Country/TerritoryUnited States
CitySan Diego


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