| 摘要 |
An improved converter body fox carrying out chemical reactions, such as oxidation, and especially oxidation of pollutant materials in exhaust streams, which converter includes an electrically heatable portion characterized by a multicellular honeycomb monolith and an integral non-electrically heatable multicellular honeycomb "light-off" portion each constructed of thin sheet metal layers. The electrically heatable portion has a surface area of from 200 to 700 square inches and is capable of being rapidly heated to a temperature of from 400 F to 900 F in a period of from about 2 to about 40 seconds from a voltage source delivering at least 500 watts of power, and the electrically heatable honeycomb portion has a cell density of from 40 to 500 calls per square inch. The "light-off" portion has a surface area in the range of from 800 to 5000 square inches and a cell density of from 200 to 750 cells per square inch.
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