Przemysl Chemiczny, Vol.82, No.12, 1491-1494, 2003
Copper manganese and copper-manganese sorbents for desulfurization of hot off-gases
(A) Cuo, (B) KMnO4, and (C) (3:2 w/w) A-B, each mixed (1:1 w/w) with TiO2, Al2O3, Fe2O3, ZnO or bentonite as support, made up with H2O, granulated, dried, and calcined 6 h/500degreesC to yield (as expected in B and C) K2O, MnO2, and/or Mn2O3, were used to sorb SO2 from a model mixt. of (96:4 v/v) N-2-SO2, 6 L/h, at 150, 300 and 450degreesC. At 300 and 450degreesC, unsupported A sorbed 260 and 152, B260 and 272 mg SO2/g, resp. The supports alone were ineffective. Cu/ZnO and Cu/TiO2 were most and least effective, 192 and 123 mg SO2/g at 450degreesC, resp. Adsorption varied with support type, was nil at 20 and max. at 450degreesC (twice as fast as that at 300degreesC). The sorbents were regenerated at (A) 600-800, (B) 800-1200, and (C) 700-1200degreesC. The supported A sorbents were easiest to regenerate and Cu/bentonite was also mech. strongest; the supported B and C were not regenerable.