Abstract
A honeycomb catalyst is prepared by supporting CuO and Na 2O on an Al 2O 3-coated cordierite ceramic for simultaneous SO 2 and NO removal from flue gas at 400 °C. Results show that (1) acid treatment of the substrate (cordierite ceramic) plays an important role in enhancing the catalytic activities; (2) coating of Al 2O 3 on the substrate shows an obvious promoting effect on both SO 2 and NO removal; (3) Na 2O addition significantly improves SO 2 removal activity but inhibits the selective catalytic reduction (SCR) activity of NO with NH 3. A catalyst containing 8.0 wt.% Cu, 2.0 wt.% Na and 21 wt.% Al 2O 3 on the acid-washed cordierite ceramic shows good activities and stability in continued reaction-regeneration cycles, with a steady sulfur capacity of 4.4 wt.% and steady-state NO conversion of about 90% at 400 °C and a space velocity of 2800 h −1.
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