Catalytic combustión of diesel soot. Deactivation by SO2 of copper and potassiu nitrate catalysts supported on alumina

SANDRA MOSCONI; ELIANA LICK; ALFREDO CARRASCULL; MARTA PONZI; ESTHER POPNZI

CATALYSIS COMMUNICATIONS

Año: 2007 vol. 8 p. 1755 - 1758

1566-7367

The SO2 poisoning of CuKNO3/Al2O3 catalysts used in the catalytic combustion of diesel soot with NO/O2 feed has studied in this work. Fresh catalysts show temperaures of maximum combustion rate (Tmax) at about 470, 375 and 368ºC for Cu/Al2O3, KNO3/Al2O3   Cu KNO3/Al2O3 respectively. Poisoned catalysts decrease the activity and thechniques of vibrational spectroscopy (FTIR) and temperature programmed reduction (TPR) suggest the KNO3  loss and the formation of potasium sulfate in the mentioned poisoned catalysts