BUBBLES GENERATED FROM POROUS PLATE IN ORGANIC SOLUTIONS AND AQUEOUS SOLUTIONS OF ORGANIC SUBSTANCES

Abstract

The average diameter of bubbles generated from the porous plate in aqueous solution of organic substance and in a mixture of polar organic liquid and non-polar liquid were measured at various gas flow rates by taking photographs of bubbles.
An addition of organic substance to water or to an organic liquid of opposite polarity reduces the degree of bubble coalescence on and above the plate, and hence the bubble size. As the degree of bubble coalescence and hence the degree of reduction of bubble size depends on da/dc₁ of the solution and the diffusivity of the solute, an empirical equation for average bubble diameter is introduced, taking the above two properties into consideration.