Accession Number : AD0694938

Title :   RATE OF ABSORPTION OF OXIDES OF NITROGEN BY NITRIC ACID AT A PRESSURE OF 1.2 kg/sq. cm,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Konvisar,V. I. ; Samiev,Ya.

Report Date : 26 MAR 1969

Pagination or Media Count : 16

Abstract : Results are presented of the effect of various physicochemical and hydrodynamic factors on the process rate of absorption of nitrogen oxides by nitric acid solutions in a foam apparatus. With an increase in the initial nitrosity of the gas, the degree of conversion of nitrogen oxides into HNO3 increases. The degree of conversion of nitrogen oxides into HNO3 is reduced with an increase in nitric acid concentration, while efficiency remains practically constant right up to 45 percent nitric acid with the same concentration of nitrogen oxides. In the case of counterflow the efficiency increases with a growth in the concentration of nitrogen oxides and nitric acid. With a certain motivating force of the absorption process, it is necessary to take into account the equilibrium pressure of the nitrogen oxides over the liquid phase. With an increase in temperature from 20 to 50 degrees C, the coefficient of the degree of achievement of equilibrium between the nitrogen oxides and the acid, or efficiency, is reduced by 0.2 percent per 1 degree C. An increase in temperature within the limits 20-50 degrees C renders in a negative influence on the absorption process. (Author)

Descriptors :   (*NITROGEN OXIDES, ADSORPTION), (*NITRIC ACID, CHEMICAL ENGINEERING), GAS FLOW, AIR POLLUTION, CHEMICAL EQUILIBRIUM, USSR

Subject Categories : Industrial Chemistry and Chemical Processing
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE