| abstract |
The invention relates to a gas purifier comprising a filtering media having a photocatalytic action, a system for illuminating said media with UV radiation, a time-delay means or a volatile organic compound analyzer, and a means for automatically adjusting the speed of the gas passing through it or for adjusting the intensity of the UV illumination, said adjusting being carried out as a function of the time determined by the time-delay means or as a function of the content of a volatile organic compound analyzed by the analyzer. The invention also relates to a process for the purification of gas using a purifier comprising a filtering media having a photocatalytic action and a system for illuminating said media with UV radiation, according to which, when the concentration of a compound in the gas is greater than a value V 1 , the operating capacity of the purifier is lower than its capacity when the concentration of the compound in the gas is less than the value V 2 , V 2 being less than or equal to V 1 . The invention also relates to a process for the purification of gas using a purifier comprising a filtering media having a photocatalytic action, a system for illuminating said media with UV radiation and a time-delay means controlling the capacity of the purifier. |