Study on the reaction activity of CuO/γ-Al2O3 for dry flue gas desulfurization

The copper oxide bed regenerable adsorber process can efficiently remove sulfur dioxide (SO2) and sulfur trioxide (SO3) and reduce nitrogen oxides (NOX) from flue gas with no solid or liquid byproducts. This paper investigates the dry flue gas desulfu- rization activities of the CuO/γ-Al2O3 under different operation conditions finding that the dispersion degree of copper oxide can achieve a threshold value, which is 0.47 mg/m2 carriers. The conclusion confirms that the sulfur capacity of desulfurizer is asso- ciated with flue gas’ space velocity, reaction temperature, copper content and the struc- ture of sorbent pellet, etc. And with the condition of the desulfurization reaction tem- perature 673 K, the space velocity 11 200 h-1 and the S/Cu mole ratio under 1, the sulfur removal efficiency can go upwards to 95%.