文档介绍：Theoretical Foundations of Chemical Engineering, Vol. 39, No. 4, 2005, pp. 367–378.
Translated from Teoreticheskie Osnovy Khimicheskoi Tekhnologii, Vol. 39, No. 4, 2005, pp. 390–400.
Original Russian Text Copyright © 2005 by Babak.
Absorption of anic Gases by Aqueous Solutions of Salts,
Primary Amines, and Ammonia
V. N. Babak
Institute of Problems of Chemical Physics, Russian Academy of Sciences,
Chernogolovka, Moscow oblast, 142432 Russia
e-mail: flora_******@
Received March 25, 2004
Abstract—The ics of absorption of anic gases by aqueous solutions of some salts, primary amines,
and ammonia in a number of practically important cases is reduced to the ics observed during absorption
of these gases by solutions of acids and bases. Problems of unsteady-state absorption and release of anic
gases from the aforementioned aqueous solutions are considered using the example of two stagnant media
(a liquid and a gas).
ABSORPTION OF ANIC GASES centration of the gas in the solution can be represented
BY AQUEOUS SOLUTIONS OF SALTS: in the form [1]
CHEMISTRY OF THE PROCESS Σ[][]–≅[]()[]1/2
'AH= + A AH + Kdis AH . (1)
Let us assume that an AH gas rates into water
after the reaction of solvation or hydration and dissoci- The absorptivity can increase, for example, when
ates with the formation of a protonium ion [1]: the products of the dissociation of the salt undergo pro-
tonation, as is the case with solutions of carbonates
+ –
AH= H + A . (Na2CO3, K2CO3, etc.):
+ 2–()∞
The chemical capacity of an absorbent can be increased Na2CO3 = 2Na + CO3 K4 = ,
using not only solutions of acids and bases [2] but also
solutions of anic salts. anic salts have a num- HCO–= H+ + CO2–()K = × 10–11 mol/l .
ber of advantages over acids and alkalis because they 3 3 3
are less corrosive to equipment and safer in service. It Taking into account that Na+, CO2–, and HCO– are
should be noted that not all salts can enhance absorp- 3 3
tion of a