Patent ID: 6358374
Filing Date: 2002-03-19
Classification: B01D

Abstract:
A process for improving the quality of indoor air by removing the gaseous contaminants therefrom comprising the steps of:(a) passing the contaminated indoor air through an adsorbent bed to adsorb said gaseous contaminants; (b) heating the said adsorbent bed from step (a) in a confined space to release said gaseous contaminants in said confined space, and regenerating said spent adsorbent bed from step (a); (c) choosing the dimensions of said confined space such that the individual concentrations of said gaseous contaminants released from said adsorbent bed in step (b) are within the range of about 0.1 to 10 ppm by volume; (d) using linear dependence of the photo-catalytic oxidation rate on concentration in the presence of a photo-catalyst in said concentration range of about 0.1 to 10 ppm by volume to quickly photo-catalytically oxidize said gaseous contaminants; and (e) repeating steps (a) through (d) a plurality of times.