Abstract
Abstract A double stirred vessel with a plane gas-liquid interface was used to measure the absorption rates of (i) NO in aqueous solutions of Fe(II)-EDTA, (ii) NO and SO2 in mixtures of Fe(II)-EDTA and Na2SO3 or Na2SO3, at 25°C and 1 atm. The forward rate constants, k2, of the complexing reaction NO + Fe(II)-EDTA→Fe(II)(EDTA)(NO) at various liquid temperatures between 25-80°C and liquid concentrations between 0.01-0.05 mol/dm3 were deduced from chemical absorption theory. The results showed that k2 increases only slightly within 25-80°C and 0.01-0.05 mol/dm3. The rate of absorption of NO during the simultaneous absorption of NO and SO2 was higher than the rate of single NO absorption when Na2SO3 was added to the Fe(II)-EDTA. Na2SO3 can replace Na2SO3, when SO2 is absorbed together with NO.
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