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Received March 2, 2004
Accepted April 19, 2004
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Temperature Profiles of the Monolith Catalyst in CO2 Reforming of Methane with in-situ Combustion of Methane and Ethane
1Department of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Korea 2Fuel Cell Research Center, Korea Institute of Science, P. O. Box 131, CheongRyang, Seoul 130-650, Korea
Korean Journal of Chemical Engineering, July 2004, 21(4), 793-800(8), 10.1007/BF02705522
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Abstract
The temperature profiles in a monolith reactor were measured in CO2 reforming of CH4 with in-situ combustion of methane and ethane in order to find out in what sequence the reactions are occurring. The reaction gas flowed both upward and downward. A hot spot was observed at low furnace temperatures, and it tended to disappear as the furnace temperature increased. This is due to natural extinguishment of the flame caused by the endothermic reforming reactions occurring. The hot spot disappeared at a lower temperature with the up-flow when compared with the down-flow. When the hot spot appears, H2O and CO2 are produced by complete oxidation and accordingly the steam reforming and the CO2 reforming occur competitively in the rear part of the monolith. If the hot spot does not appear, it is considered that the partial oxidation of methane occurs predominantly over the complete oxidation, resulting in more efficient CO2 removal.
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