Laboratory-scale measurements were performed on the absorption of NO, gas into diluted nitric acid. The concentration of NO, gas, which represents an N02/N204 equilibrium, varied from 1000 to 20000 ppm, the carrier gas being nitrogen. The concentration of nitric acid ranged from 15 to 60 mass-%. The absorption experiments were carried out in a double stirred cell, with a defined gadliquid interface as the mass transfer area. The liquid phase was conducted periodically and the gas phase continuously. Mass flow rates were determined. The well-known film model of absorption was used for analyzing the experimental results. Only the N,O, species was considered to pass the gadliquid interface. The measured data yielded values of HN204 (k D,)"2 as well as their variation with temperature and nitric acid concentration.
Laboratory-scale measurements were performed on the absorption of NO, gas into diluted nitric acid. The concentration of NO, gas, which represents an N02/N204 equilibrium, varied from 1000 to 20000 ppm, the carrier gas being nitrogen. The concentration of nitric acid ranged from 15 to 60 mass-%. The absorption experiments were carried out in a double stirred cell, with a defined gadliquid interface as the mass transfer area. The liquid phase was conducted periodically and the gas phase continuously. Mass flow rates were determined. The well-known film model of absorption was used for analyzing the experimental results. Only the N,O, species was considered to pass the gadliquid interface. The measured data yielded values of HN204 (k D,)"2 as well as their variation with temperature and nitric acid concentration.
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