Yuono, Yuono and Bahrin, David and Herri, Susanto (2015) Preparation and Characterization of CuO/γ-Al2O3 for Adsorption of SO2 in Flue Gas. Modern Applied Science, 9 (7). ISSN ISSN 1913-1844 E-ISSN 1913-1852

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Abstract

Adsorbent CuO/γ-Al2O3 was successfully prepared by the dry impregnation using Cu(NO3)2.3H2O solution on commercial γ-Al2O3. Impregnation and calcination process was be done repeatedly to get a desired CuO content on the support. The impregnations were done at 50o C for 8 hours or 120°C for 5 hours. Calcinations were carried out at a temperature of 400oC for 8 hours. Adsorbent obtained from this preparation contained Cu: 7.93% (named 8Cu), 14.76% (15Cu) and 28.98% (30Cu). Pore characteristic indicated that the surface area decreased with the increase in Cu content in the adsorbent (from 207 in original support to 124 m2 /g in 8Cu). Similar tendency was found for the pore volume (from 0.47 to 0.28 mL/g). In batch adsorption test, the amount of adsorbed SO2 was calculated from the increase in mass of adsorbent. Adsorbent 8Cu had the best adsorption capacity in term of mol ratio, ie. 0.78 SO2/CuO (close to stoichiometry). Original support of γ-Al2O3 was found to be inert to SO2. In semi-continue test, the adsorption was carried under a flow of gas containing 2.5% SO2. The amount of adsorbed SO2 was calculated from the different of SO2 content between influent to effluent. It was found again that the best adsorbent was 8Cu with the adsorption capacity of 0.97 mol/mol CuO.

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