TY - GEN
T1 - Experimental investigation of gaseous reactive flows around catalytically coated micro-wires
AU - Bijjula, Kowtilya
AU - Kyritsis, Dimitrios C.
AU - Roychoudhury, Subir
N1 - Funding Information:
The authors would like to gratefully acknowledge the support of the National Science Foundation under grant CTS 04-48968CAR (Dr. Phillip Westmoreland, contract monitor). Also, the support of Dr. Subir Roychoudhury of Precision Combustion Inc., who kindly provided the catalytically coated cylinders, is acknowledged. Mr. Ricardo Mejia Alvarez of the University of Illinois at Urbana-Champaign is acknowledged for providing assistance with the PIV experiments. FLUENT ® is a trademark of ANSYS, Inc.
PY - 2007
Y1 - 2007
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84944039181&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84944039181
T3 - 5th US Combustion Meeting 2007
SP - 1747
EP - 1752
BT - 5th US Combustion Meeting 2007
PB - Combustion Institute
T2 - 5th US Combustion Meeting 2007
Y2 - 25 March 2007 through 28 March 2007
ER -