Adsorption of contaminants from gaseous stream and in situ regeneration of sorbent
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United States of America Patent
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Jan 8, 2008
Grant Date -
May 11, 2006
app pub date -
Dec 11, 2002
filing date -
Dec 19, 2001
priority date (Note) -
Expired
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Abstract
Contaminant is removed from a gaseous stream, especially an air stream bearing the contaminant, by adsorption on a sorbent which is a resiliently compressible, electrically conductive, activated carbon cloth material, leaving a gaseous stream liberated of the contaminant; the carbon cloth material loaded with the contaminant may be regenerated by desorption of the contaminant; the carbon cloth material loaded with contaminant is housed in a vacuum and electric current is passed through the carbon cloth material generating heat in the cloth material which is effective to desorb the contaminant which is exhausted under vacuum; the level of heat generated is varied as required, typically to develop a temperature of 250 to 500.degree. C. in the cloth material, by varying the compression of the cloth material; desorption is typically achieved in about 30 minutes at a vacuum of 10 Torr or less.
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