Author(s)

Jozsef Kovacs and Tibor Egyhazy

Abstract

The selective catalytic reduction (SCR) of nitrogen-oxides by ammonia to nitrogen and water vapours is widely used for decontamination of both technological, quite concentrated tail gases and industrial boilers with nitrogen oxides content not more than Ig/nf. For treatment of low-temperature gases traditional SCR flow-sheet includes heat-exchanger for heat transfer between inlet and reacted gases. In the flow reversal catalytic processes the catalyst bed of an adiabatic reactor acts as a catalyst and as a regenerative heat exchanger, simultaneously. An experimental reactor has been constructed, which almost completely reached the goal of an adiabatically operating system. The influence of several operating parameters such as gas flowrate, cycle period, chemical composition of inlet gases (space ve

Keywords