Abstract: A vapor phase adsorption system employing an adsorbent for removing a volatile organic compound from an air stream to produce a purified air effluent in which the adsorbent first adsorbs the compound and is then regenerated by raising the temperature of the adsorbent to a maximum desorption temperature, which employs an improvement which comprises an unloading compound pre-adsorbed on the adsorbent, wherein the unloading compound is an organic compound having a boiling point greater than that of the volatile organic compound and having an equilibrium loading capacity on the adsorbent at the maximum desorption temperature greater than the equilibrium loading capacity of the volatile organic compound.

Abstract: A flash lamp power supply system, comprising (a) a simmer power supply circuit, comprising (i) a DC simmer power supply, (ii) means for connecting a flash lamp in series with the DC power supply, and (iii) a capacitor connected in parallel to the power supply and to the flash lamp connecting means, wherein the impedance and capacitance of the simmer power supply are selected so as to provide dV/dT for the simmer power supply circuit equal to or greater than the rate at which the lamp impedance changes during a flash cycle; and (b) a pulse power supply circuit, comprising (i) a DC pulse source voltage supply, (ii) a thyristor, and (iii) means for connecting the lamp in series with the DC pulse source voltage supply and the thyristor, wherein the pulse power supply circuit further comprises a capacitor connected in parallel with the pulse source voltage supply.

Abstract: A reactor for the treatment of a fluid with a substantially uniform dosage of light from a light-type light source, which comprises:a reactor housing forming an internal space comprising a fluid entry region, a fluid exit region,a central photochemical treatment region comprising a housing, a means for circumferentially distributing fluid flow radially towards and perpendicular to a line-type light source, and a fluid exit region, wherein the central photochemical treatment of the housing is rotationally symmetrical about a central axis andone or more line-type light sources mounted in the treatment region substantially at the central axis of the housing, the axis of the lamps being oriented parallel to the rotational axis of the treatment region housing.Methods are also provided using the circumferential distribution of fluid flow radially toward and perpendicular to the line-type light source.