| 摘要 |
Disclosed is a process for treating a pollutant-containing gaseous effluent of the kind in which the pollutant is susceptible to catalytic oxidation to render it inoffensive, characterized by the steps of passing a major fraction of the effluent through material which will adsorb substantially all of the pollutant therein, while utilizing the remainder of the effluent to transfer, for catalytic oxidation in a catalytic reactor at an elevated temperature, pollutant which has already adsorbed on such material from said major fraction, and to promote the circulation of gases through the catalytic reaction zone, and repeatedly and appropriately changing the role of material from an adsorbing role to a catalytic oxidation role and back again. The process may involve two beds of material which are used alternately as adsorbing beds, the other bed meanwhile being stripped of adsorbed pollutant for catalysis. In another process a single bed of material, which is also an oxidation catalyst for pollutant, is used, and material, with adsorbed pollutant, is continuously circulated from the bed which is preferably fluidized, by entrainment in the remainder of the effluent for conveyance to the catalytic reaction zone, and back again to the bed. Also disclosed is apparatus for carrying out such processes.
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