Experimental research on the volatilization and condensation of ammonium bisulfate as SCR byproduct

Abstract In this paper, the research progress of ammonium bisulfate (ABS) volatilization in coal-fired power plants SCR denitrification process was reviewed. Combination with self-made experiments, SEM, flue gas analyzer and TG-DTG curves ABS ion chromatography. The condensation characteristics were investigated carefully. Results show that as temperature increased by 50 o C, ABS/AS rate an order magnitude. decomposition should have a two-step reaction. reaction initial volatiliza-tion stage is dehydration turned into (NH 4 ) 2 S O 7 . rapid volat-ilization decomposed NH3, N , SO H2O. There inter-section range (especially 300 C) between re-action. This provides experimental basis for control to avoid air pre-heater fouling.