Purification of air in enclosed spaces

Details Purification of air in enclosed spaces Purification of air in enclosed spaces

1996-02-28

1998-03-31

Langel, Wayne

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

55522, 95116, 95129, 95136, 95137, 95143, 95147, 423230, 423235, 42324401, 42324403, 4232451, B01D 3920, C01B 1700, C01B 1716, C01B 2100

Patent

active

057335150

ABSTRACT:
The present invention discloses an improved method for filtration of air within enclosed spaces. Improvement is achieved by the use of a high-temperature carbonaceous char that is catalytically active for the removal of certain undesirable constituents from contaminated air under ambient temperature conditions. This carbonaceous char is used as an air filtration medium and incorporated into an air filtration device by any of a number of technologies. Such devices may be used for removal of contaminants such as NO.sub.x, NO.sub.2, SO.sub.x, SO.sub.2, H.sub.2 S, mercaptans, light aliphatic gases such as butane and propane and other compounds such as benzene, hexane, toluene, xylene, amines and the like from enclosed or confined structures such as buildings or vehicles including automobiles, aircraft, trucks, farm equipment, and the like.

REFERENCES:
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J. Wang and W. Xie, "An Appraisal of the Surface Chemistry and the Catalytic Oxidative Activity of Nitrogen-Modified Activated Carbon by XPS", Cuihua Xuebao 10(4), 357 (1989).
B. Stohr, H.P. Boehm, and R. Schlogl, "Enhancement of the Catalytic Activity of Activated Carbons in Oxidative Reactions by Thermal Treatment with Ammonia or Hydrogen Cyanide and Observation of Superoxide Species as a Possible Intermediate", Carbon 29(6), 707 (1991).

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