XXXVIII. The determination of the rate of solution of atmospheric nitrogen and oxygen by water.—Part II

Abstract

I. I~T~ODUCTIOZ~. I N the first part of this communication T a method of studying the rate of solution of air by water was described, and some results were given, which showed that, when the water was kept thoroughly mixed and the waterair surface unbroken, the phenomenon took place in accordance with the general equation dw z w in which a represents the initial rate of solution, and bw the rate of escape of the gas from the water, b being a constant depending on the conditions of the experiment. The method of experimenting consisted in enclosing a large bubble of air, of known volume, in a narrow tube containing de-aerated water, and allowing the bubble to pass

Liquid film in Gas Absorption

“…Since the colloidal nature of coal has long been recognized (1,11,18), it is appropriate to consider plastic phenomena largely from the viewpoint of colloidal chemistry. Important conclusions as to the origin of the structural constituents in coal have been reached from microscopic and ultramicroscopio studies (13,17,18,20).…”

“…From the colloidal point of view coal may be looked upon as a coagel (1) in which the micelles and no doubt other particles are dispersed. Agde and Hubertus (1,2) showed that a considerable proportion of the coal can be dispersed in certain…”

“…Gas and liquid film resistances are additive, and each is represented as the reciprocal of the individual film coefficient, ka or Au. The rate of interphase transfer is given by the Lewis-Whitman equation ( 14)'• Na = k0(vo -Pi) = kL(Ci -C) = Ko(pa -Pl) = Kl(Co -C) (1) where Na = rate of transfer of solute, gram moles/sq. cm./hour pa = partial pressure of solute in main body of gas, atm.…”