Simultaneous absorption of two gases A and B: absorption of A accompanied by fast irreversible reaction resulting in the formation of B

✍ Scribed by P.A. Ramachandran; M.M. Sharma

• Publisher: Elsevier Science
• Year: 1970
• Tongue: English
• Weight: 495 KB
• Volume: 25
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(70)80065-3

✦ Synopsis

The problem of simultaneous absorption and reaction of two gases A and B, where the reaction of A results in the formation of B, is considered. Analytical equations are derived to predict the decrease in the rate of absorption of the gas B due to the presence of the gas A. It is shown that under certain conditions, no B will be absorbed, even when the concentration of dissolved B in the bulk liquid is zero.

IN THIS note, the problem of simultaneous absorption of two gases, A and B, in a liquid medium is considered. The gas B is assumed to be physically soluble in the liquid medium and does not undergo a chemical reaction. The absorption of A is accompanied by a fast irreversible reaction resulting in the formation ofB:

( 9The problem is to estimate the decrease in the rate of absorption of the gas B due to the presence of the gas A. The problem is of some industrial importance.

Thus, for instance, a mixture of phosgene and carbon dioxide may be absorbed in water with the view of removing the obnoxious compound -phosgene. Here the hydrolysis reaction of phosgene results in the formation of CO,: