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Absorption of NO in an Aqueous Solution of NaClO 2
Author(s) -
Brogren Charlotte,
Karlsson Hans T.,
Bjerle Ingemar
Publication year - 1998
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/(sici)1521-4125(199801)21:1<61::aid-ceat61>3.0.co;2-0
Subject(s) - sodium chlorite , chemistry , aqueous solution , absorption (acoustics) , inorganic chemistry , chlorite , reaction rate , redox , hydrolysis , reaction rate constant , sodium , oxide , kinetics , catalysis , organic chemistry , materials science , quartz , physics , quantum mechanics , chlorine dioxide , composite material
A packed column has been used to study the absorption of nitrogen oxide in an alkaline solution of sodium chlorite. The reactions taking place during the absorption have been examined and a lumped reaction model has been used to estimate rate constants from experimental data. Several parallel and consecutive reactions were found to take place during the absorption. NO was found to be oxidized to NO 2 and/or to NO 2 – , and ClO 2 – was reduced to Cl – and/or to ClO – . The pH value of the absorbing liquid was found to have a great impact both on the absorption rate and on the extent of the different redox reactions within the liquid. Experimental results indicate that sodium chlorite mainly works as an agent to oxidize NO to NO 2 and that the major part of the nitrogen oxides are absorbed via the hydrolysis of N 2 O 3 and N 2 O 4 .