KINETICS OF NO ABSORPTION IN AQUEOUS IRON (II)THIOCHELATE SOLUTIONS

Ferrous thiochelate solutions were used to absorb NO from flue gas. Th e absorption rates were studied as a function of pH with a double-stir red reactor at 50 degrees C. The rate constants of five ferrous thioch elates: Fe2+ (dimercaptosuccinate)(2), Fe2+ (dithioloxalate)(2), Fe2(aminoethanethiol)(2), Fe2+(cysteine)(2), Fe2+(penicillamine)(2), reac ted with NO at pH 5.5 and pH 7.0, have been determined. The implicatio ns of the kinetic data on the use of these iron thiochelate additives in wet flue gas desulfurization scrubbers: limestone,lime, and sodium, for simultaneous SO2 and NOx removal is discussed.