Heat isolated catalytic reactor

Details Heat isolated catalytic reactor Heat isolated catalytic reactor

1993-07-19

1996-02-06

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

422179, 422180, F01N 310

Patent

active

054888263

ABSTRACT:
A catalytic reactor for reducing pollutants in the exhaust gas from an internal combustion engine includes a catalyst element and a heat shield exterior to the catalyst element. The heat shield and catalyst element are mounted within an exhaust pipe so that two annular insulation spaces exist between the catalyst element and the exhaust pipe. The first annular insulation space is located between the interior wall of the exhaust pipe and the exterior wall of the heat shield. The second annular insulation space is located between the interior wall of the heat shield and the catalyst element itself. A spring washer positioned between one end of the catalytic reactor and an axial retaining flange on the exhaust pipe allows the catalytic reactor to expand axially as it heats to operating temperature. A layer of ceramic material may be deposited on the exterior surface of the heat shield to further reduce heat transfer to the exhaust pipe.

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