1) Absorption of pure CO₂ in water was investigated using a 6-cm-dia. tower, packed with 6mm, 8mm and 10mm Raschig rings. The results are shown in Figs. 2, 3, and 4 and by Eqs. (2), (3) and (4).
2) Based on the theory of penetration, the correlations of kL were studied in the form of kL[T]^1/2/ DL^1/2 to (L/a_tμ), (ρρ²g/a_t³μμ²) and (D_ta_t), where T=exposure time.
3) The data of Sherwood-Holloway, Vivian-Whitney, Deed-Schutz-Drew, Hikita and the authors were reasonably correlated as shown in Fig. 9. The center line in Fig. 9 is expressed by Eqs. (12) and (13).
4) Eq. (14) derived from Eq. (13) shows that kL is in proportion to (LD_p/μ)^1/2. By estimating the power of (Ga) roughly at 1/3, Eq. (12) has been simplified into Eq. (15), its modification Eq. (15') representing modified Sherwood number.