Effect of Concentration on Gas-Liquid Mass Transfer Coefficient

Kinetics of Carbon Dioxide Evolution in Agitation System

“…In mass transfer of carbon dioxide between gas phase and liquid phase in agitation systems, the liquid film resistance was assumed to be a controlling factor. 20) The viscosity of the fluid might affect the mass transfer of carbon dioxide across gas-liquid interface rather than dehydration of bicarbonate ions.…”

“…Yoshida et al, 22) Gibbs et al,20) and Aiba et al23) According to the formula (3), hydration of carbon dioxide (carbon dioxide absorption) may follow to the second-order kinetics equation below, (24) where (C C02 )0 is the concentration of carbon dioxide at time 0, (CRCO~)t is the concentration of bicarbonate ion formed for time t and (COH-)o is the initial concentration of hydroxide ions. This was confirmed by Kiese …”

“…20) Hence, molarity of formed bicarbonate ion concentration resulted by hydration of carbon dioxide is equal to the variation of hydrogen ion concentration, equation (24) can be modified, (25) where (CH+)t is the concentration of hydrogen ion formed for time t resulted by hydration of carbon dioxide. Assuming that carbon dioxide absorption is carried out in pH-stat, (CH+)t can be neglected against (COH-)o and equation (25) H02 and HC02 for this calculation was followed to the values shown in Table V.…”

Liquid‐liquid extraction with association effects

“…-4 more realistic boundary condition for the solution of the diffusion equation would be that given in Kquation (8). -4 more realistic boundary condition for the solution of the diffusion equation would be that given in Kquation (8).…”

Liquid-Liquid Extraction

“…Himmelblau (30) and Gibbs and Lazarraga (20) investigated the effect of concentration on the mass transfer coefficient. Using the Lewis equation, dC/dt = KA(C -C*)/V, they found that K varied directly with the diffusivity, thus continuing this controversy and bringing the divergent views full circle in the sense that we now have proponents stating that the mass transfer coefficient is independent of molecular diffusivity, D, that it varies as D0•87, that it varies as D°-m, and that it varies directly with D.…”