Effect of calcinations temperature of Cu/Ti-PILCs for selective catalytic reduction of NO by propylene

Catalyst Cu/Ti-PILCs were used for selective catalytic reduction of NO by propylene. The effect of calcinations temperature of Cu/PILCs on catalytic activity, pore structure and active species were investigated. Cu/Ti-PILCs calcined at 500 degrees C had best activity. On 500 degrees C-calcined catalyst, the Cu species was highly-dispersed and existed mainly as Cu(2+)species which was the catalytic active component to SCR reaction. The pore structure of Cu/Ti-PILCs had good thermal stability below 600 degrees C calcinations. 700 degrees C-calcined catalyst has poor catalytic activity. High-temperature calcinations destroyed the catalyst's pore structure, and formed CuO bulky aggregation which had no catalytic activity, all these led to the decrease of the S-BET of catalysts and the drop of catalytic activity.