Effect of Regeneration Temperature onParticle Characteristics and Extent of Regeneration of Saturated SO2-Adsorption of CuO/γ-Al2O3 Adsorbent

Abstract

The effect of regeneration temperature on characteristics and extent of desorption of saturatedCuO/γ-Al2O3 have been studied. Adsorbent CuO/γ-Al2O3(8%-Cu) was prepared using the dry impregnation method with Cu(NO3)2.3H2O solution on a commercial γ-Al2O3. SO2 adsorption process of the adsorbent CuO/γ-Al2O3were conducted on temperature of 400°C with a concentration of SO2 in a model gas of 18500 ppmv and the initial weight of adsorbent of 1.0 gram. Regeneration of saturated adsorbent were carried out under air flowat various temperatures of 500, 600 or 700°C. Both of adsorption and regeneration experiments were carried out with a flowrateof model gas or air of 1.4 – 1.8mL/sec for 60minutes. Extent of desorption of saturated adsorbent CuO/γ-Al2O3were measured based on the different weight of the adsorbent between the beginning and the end of adsorption and regeneration process. Regeneration temperaturesof 500 and 600°C did not significantly effect the averagepore diameter of adsorbent. But that of 700°Caffectedthe specific surface area and averagepore diameter ofthe adsorbentsignificantly. The extent of desorption of the saturated adsorbentCuO/γ-Al2O3at the regeneration temperature of 600°Cwas higher thanthose of 500and700°C. Up to four adsorption-desorptioncycles, the extent of desorption were more less constant. This experimental results reveal a promising method for the development of flue gas desulfurization related the use of coal with a high sulfur content in power stations.