Abstract
Absorption rate of nitrogen dioxide (NO_2) at water surface was experimentally determined. Total concentration of nitrous (HNO_2) and nitric acid (HNO_3) was directly proportional to NO_2 concentration. It also depended on the water temperature and followed Arrhenius' law. The existence of NO did not have much influence on NO_2 absorption rate. Experiments of NO_x absorption at condensing heat exchanger were carried out. In this case, the concentration of NO^-_x(NO^-_2+NO^-_3) decreased as the condensation rate increased. It was shown that the amount of NO_x dissolved in condensate on heat exchanger increased as NO_2 concentration and condensation rate increased and was well correlated with the amount of NO_2 gas passing through heat exchanger.
