Catalytic oxidation of S(IV) in seawater slurries of activated carbon.
Flue gas desulfurization (FGD) by means of SO2 absorption in seawater is a well-known process with a main drawback; due to the low S(IV) oxidation rate at the low pH values of the absorption tower effluent, a large oxidation basin is required. Laboratory reactor tests, in which a commercially available activated carbon was used, showed a significant catalytic effect. It is shown that the kinetic equation for the catalytic oxidation of S(IV), in seawater slurries of activated carbon, is first-order with respect to S(IV) and zero-order with respect to oxygen. The dependence of the kinetic constant with respect to pH, temperature, and catalyst size particles were also obtained.
Vidal
B F
BF
Department of Chemical and Environmental Engineering, University of Seville, Camino de los Descubrimientos s/n, 41092, Sevilla, Spain. vidal@esi.us.es
Ollero
P
P
Gutiérrez Ortiz
F J
FJ
Arjona
R
R
D000393:Air Pollutants / Q000302:isolation & purification; D002244:Carbon / Q000737:chemistry; D002384:Catalysis; D007700:Kinetics; D010084:Oxidation-Reduction; D012623:Seawater / Q000737:chemistry*; D013455:Sulfur / Q000737:chemistry*; D013458:Sulfur Dioxide / Q000302:isolation & purification
D000393:Air Pollutants; D013458:Sulfur Dioxide; D013455:Sulfur; D002244:Carbon