The absorption rate of carbon dioxide into laminar falling films of aqueous NaOH solution, NaOH-kaolin slurry and NaOH-white carbon slurry was measured by various changes of contact time between gas and liquid using a wetted-wall column at 20℃. The...
The absorption rate of carbon dioxide into laminar falling films of aqueous NaOH solution, NaOH-kaolin slurry and NaOH-white carbon slurry was measured by various changes of contact time between gas and liquid using a wetted-wall column at 20℃. The experimental data were analyzed by the penetration theory based on the gas absorption with second-order irreversible chemical reaction between CO₂ and OH^-. The measured reaction enhancement factors were consistant with those predicted by the approximate equation (14) derived by the convective-diffusion equation within an average deviation of 8, 7.8 and 9.3% in the NaOH, NaOH-kaolin slurry and NaOH-white carbon slurry, respectively. The mechanism of gas absorption with reaction into Newtonian liquid could be also used in the case of power-law liquids.