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ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

Convective Heat Transfer of Reactive Gas Flowing across a Cylinder Coated with Platinum Catalyst in a Duct

Get access (open in a dialog) DOI: 10.1615/IHTC11.2360
pages 21-25

Аннотация

The effect of a catalytic surface reaction on the convective heat transfer is studied for a cross flow to a cylinder. Platinum catalyst is coated on the surface of the cylinder which is set horizontally in a rectangular duct The fluid is a mixture of SO2 and O2 and the following exothermic reaction takes place on the surface of the cylinder: SO2 + 1/2 O2 = SO3 + 99 kJ/mol. The cylinder is uniformly heated electrically from the inside by the DC power supply, and the reactant gas flows through a small clearance between the cylinder and the duct wall. The heat transfer coefficient is determined based on the temperature difference between the inlet gas and the forward stagnant point of the cylinder. The heat transfer coefficient for the non-reacting gas is about two times higher at least than the conventional correlation because of the effect of natural convection and small clearance. When the reaction takes place, the heat transfer coefficient rises by 4-16%. The effect of the enhancement is proportional to the reaction rate.