Literature 1) Ballard, L.H. & M. Van Winkle: Ind. Eng. Chem., 44, 2450 (1952) 2) Ellis, S.R.M.. Jonah, D.A.: Chem. Eng. Sci., 17, 971 (1962) 3) Ellis,

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1 Literature 1) Ballard, L.H. & M. Van Winkle: Ind. Eng. Chem., 44, 2450 (1952) 2) Ellis, S.R.M.. Jonah, D.A.: Chem. Eng. Sci., 17, 971 (1962) 3) Ellis, S.R.M. & R.D. Garbett: Ind. Eng. Chem., 52, 385 (1960) 4) Gautreaux, M.F., Coates, J.: A.I. Ch. E.J., 1, 496 (1955) 5) Genkin, A.N, et al.: Zh. Prik. Khins., 36, 142 (1963) 6) George, W.W., et al.: Ind. Eng. Chem., (1959) 7) Hale, E., et al.: "Vapour-Liquid Equilibrium". Pergamon (1958) 8) Hiranuma, M, et al.: Chem. Eng., Japan, 30, 613 (1966) 9) Hirose, Y.: Chem. Eng., Japan, 30, 315 (1966) 10) Kobayashi, R.: Petroleum Refiner, 39, 125 (1960) 11) Kojima, K., et al.: Preprint for 31st Chem. Eng. Meeting at Tokyo, p.75 (1966) 12) Ogorodnikov, S.K. & V.B. Kogan: Zh. Prik. Khim., 35, cited 461 (1962) 13) Perry. J.H.: "Chemical Engineers' Handbook", 3rd. McGraw-Hill (1950) 14) Perry, J.H.: "Chemical Engineers' Handbook", 4th, McGraw-Hill (1963) 15) Pierotti, G.J., et al.: Ind. Eng. Chem., 51, 95 (1959) 16) Ramalho, R.S., et a.: Ind. Eng. Chem., (1961) 17) Reid, R.C. & T.K. Sherwood: "The Properties of Gases and Liquids". McGraw-Hill (1958) 18) Rogers, S.P. & J.F. Johnson: Ind. Eng. Chem., 52, 691 (1960) 19) Sheets, M.R. & J.M. Marchello: Hydrocarbon Pretesting, 42, 99 (1963) 20) Willace, D.H. & M. Van Winkle: Ind. Eng. Chem., 44, 205 (1952) 21) Yorisane, M. & S. Sadamoto: Preprint for Symposium at Kyoto, p.137 (1963) * <Effect of Packing Materials on the Wetted Surface Area> Received on March 23, 1966 ** Kakusaburo Onda and Hiroshi Takeuchi (Dept. of Chem. Eng., Nagoya Univ., Nagoya)

2 Table 1 Packing pieaces and liquid properties used for experiments on wetted surface areas

3 Fig. 2 Experimental results of wetted areas for Berl saddles Fig. 1 Experimental results of wetted areas for Rasching rings Fig. 5 Effect of viscocity on wetted areas Fig. 3 Experimental results of wetted areas for Spheres Fig. 4 Literature-values of wetted areas for Raschig rings

4 Fig. 6 Effect of total surface area on wetted areas Fig. 7 Effect of surface tension on wetted areas Fig. 8 Method of measurement of contact angle

5 Fig. 10 Comparison of wetted areas by packing material for Raschig ring Fig. 11 Comparison of wetted areas by packing material for Spheres and Rods Table 2 Experimental results of kla for various packings at 25 Ž

6 Fig. 12 Relation of ƒðc to wetted areas Fig. 13 Correlation of wetted area for various packings

7 Fig. 14 Wetted area calculated by Eq.(6) Fig. 16 Comparison between predicted and observed values of kla Fig. 15 Correlation of kl, on Re with various packings

8 Table 3 Applicable or experimental regions for kla prediction Nomenclature a: effective interfacial area in packing [m2/m3] liquid side mass transfer coefficient m/hr at: total surface area of packing [m2/m3] aw: wetted surface area of packing [m2/m3] aw': wetted surface area calculated by Eq.(6) DL: liquid diffusivity of the component absorbed [m2/m3] [m2/hr] Dp: nominal size of packing [m] Fr: Froude number (atl2/ƒï2g) [-] g: gravitational constant [m/hr2] G: superficial mass velocity of gas [kg/m2 Ehr] gas side mass transfer coefficient [kg Emole/m2 Ehr Eatm] L: superficial mass velocity of liquid ] [kg/m2 Ehr] n: proportional constant of Eq.(9) [-] Re: Reynolds number (L/atƒÊL) [-] We: Weber number(l2/ƒïƒðat) [-] contact angle [degree] a: advancing contact angle [degree] r: receding contact angle [degree] liquid viscocity [kg/m Ehr] L: liquid density [kg/m3] liquid surface tension [kg/hr2] critical surface tension [kg/hr2] 1) Davidson, J. F.: Trans. Inst. Chem. Engrs. (London), 37, 51 (1957) 2) Ellison, A. H. & W. A. Zisman: J. Phys. Chem., 58, 260 (1954) 3) Fox, H. W. & W. A. Zisman: J. Colloid Sci., 7, 442 (1952) 4) Fujita, J. & S. Sakuma: Kagaku Kogaku (Chem. Eng., Japan). 18, 64 (1954) 5) Fujita, J. & T. Hayalcawa: ibid., 20, 113 (1956) 6) Garner, F. H., S. R. M. Ellis & J. W. Hill: A. I. Ch. E. Journal, 1, 185 (1955) 7) Grimley, S. S.: : Trans. Inst. Chem. Engrs. (London), 23, 233 (1945) 8) Hikita. H. & K. Kataoka: Kagaku Kogaku (Chem. Eng., Japan), 20, 528 (1956) 9) Hikita. H., M. Sugata & K. Kamo: ibid., 18, 454 (1954) 10) Hikita. H.: Preprint of 3'rd Symposium on Chemical Engineering, Nagoya, Japan, p.23 (1964) 11) Jackson, M. L., K. L. Holman & U. J. Krukonis: A. I. Ch. E. Journal, 11, 1088 (1965) 12) Komori, T. and E. Hirai: Kagaku Kogaku (Chem. Eng.,

9 Japan), 29, 532 (1965) 13) Mada, J., H. Shinohara and M. Tsubahara: ibid., 27, 978 (1963) 14) Mayo, F., T. G. Hunter & A. W. Nash: J. Soc. Chem. Ind., 54, 375 T (1935) 15) Olson, D. A. & A. J. Osteraas: J. Phys. Chem., 88, 2730 (1964) 16) Onda, K., E. Sada & Y. Murase: A I. Ch. E. Journal, 5, 235 (1959) 17) Onda, K., T. Okamoto & H. Honda: Kagaku Kogaku (Chem. Eng., Japan), 24, 490 (1960) 18) Onda. K., E. Sada, C. Kido & A. Tanaka: ibid., 27, 140 (1963) 19) Onda, K., E. Sada & Y. Okabe: Preprint of the Meeting for Chemical Engineering in Tokai Branch of Society of Chemical Engineering, Nagoya, Japan (1963) 20) Sherwood, T. K. & F. A. L. Holloway: Trans. Am. Inst. Chem. Engrs., 36, 39 (1940) 21) Shulman, H. L., C. F. Ullrich, A. Z. Proulx & J. O. Zimmerman: A. I. Ch. E. Journal, 1, 253 (1955) 22) Ueyama, K., H. Hikita, S. Nishigami & S. Funahashi: Kagoku Kogaku(Chem. Eng., Japan). 18, 68 (1954) 23) Van Krevelen D. W. & P. J. Hoftijzer: Chem. Eng. Progr., 44, 529 (1948) 24) Vivian, J. E., P. L. T. Brian & U. J. Krukonis: A. I. Ch. E. Journal. 11, 1088 (1965) 25) Yoshida, F. & T. Koyanagi: Ind. Eng. Chem., 50, 365 (1958) 26) Yoshida, F. & T. Koyanagi: A. I. Ch. E. Journal, 8, 309 (1962) 27) Yoshida, F.: Kagaku-Kikai-Gizitsu, Vol.16, p.70 (1964) <Calculatioan of Multicomponent Distillation with Side Cut Streams> Received on April 30, 1966 ho Yamada, Hidezumi Sugie and Takaitsu Iwata (Dept. of Chem. Eng., Nagoya Institute of Technology, Na- )

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<Measurements of Isobaric Boiling Point Curves at High and Low Pressures> Received on July 12, 1968 ** Kazuo Kojima (Dept. Eng. Chem., Nihon Univ., To

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