초록 ▼

Carbonaceous particles are removed from an exhaust gas stream by passing the stream through a frustoconically shaped bleaching zone into which a similarly shaped diverging beam of laser radiation that is absorbed selectively by the particles is directed countercurrent to the stream. The radiation is

Carbonaceous particles are removed from an exhaust gas stream by passing the stream through a frustoconically shaped bleaching zone into which a similarly shaped diverging beam of laser radiation that is absorbed selectively by the particles is directed countercurrent to the stream. The radiation is reflected within the zone to increase the radiation density in the zone over that generated by the laser directly.

대표청구항 ▼

A process for removing a pollutant from a gas stream comprising exposing the stream to laser radiation that is directed substantially countercurrent to the flow of the gas stream and has a wavelength that is absorbed selectively by the pollutant for a time sufficient to effect substantially complete

A process for removing a pollutant from a gas stream comprising exposing the stream to laser radiation that is directed substantially countercurrent to the flow of the gas stream and has a wavelength that is absorbed selectively by the pollutant for a time sufficient to effect substantially complete thermal degradation of the pollutant, the exposure occuring in a zone having a frustoconical shape, the gas stream passing in the direction from the base to the apex of the zone and the laser radiation being admitted into the zone at the apex thereof in a conically shaped beam that generally conforms to the dimensions and shape of the zone.