摘要
The causes of deactivation of SCR denitrification catalyst used in a glass furnace were studied by means of low temperature nitrogen adsorption and desorption characterization,X-ray fluorescence spectrometry analysis,and thermogravimetric-mass spectrometry-infrared characterization.The results show that the main causes of sample A inactivation were serious alkali/alkaline earth metal poisoning and As poisoning;sample B was weakly affected by alkali/alkaline earth metal poisoning,mainly by As poisoning and P poisoning.Severe micropore and mesoporous blockage occurred in the inactivated samples A and B,mainly due to tar adsorption and the deposition of large amounts of ammonium bisulfate and metal sulfate in the carrier.The tar and ammonium sulfate adsorbed in the catalyst can be effectively removed before being heated to 550℃.
