Catalyst composition and method of controlling PFC and HFC emissions
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United States of America Patent
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Jan 13, 2004
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N/A
app pub date -
Mar 21, 2002
filing date -
Jun 12, 1996
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Expired
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Abstract
The present invention relates to a catalytic process for the destruction of PFC's and HFC's using a catalyst which comprises aluminum oxide that has preferably been stabilized through the addition of a stabilizing agent (such as, titanium, zirconium, or cobalt, or mixtures of these elements). The addition of these elements to the aluminum oxide unexpectedly enhances the catalyst's stability without significantly altering its reactivity. The total amount of stabilizing agent added to the catalyst can be as low as 0.005 parts (by weight) stabilizing agent per part (by weight) aluminum oxide (Al.sub.2 O.sub.3) or as great as 2 or more parts (by weight) stabilizing agent per part (by weight) aluminum oxide; so long as there is sufficient aluminum oxide available to effectively catalyze the destruction of the target PFC's and/or HFC's. An oxidizing agent, such as, for example, platinum, palladium, rhodium, iridium, silver, nickel, copper, iron, vanadium, and/or cerium, may be added to the catalyst to effectively convert any carbon monoxide to carbon dioxide.
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