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Bubble Column 에 있어서의 Gas Hold - up 에 미치는 부유물의 영향에 관한 연구
김주봉,손진언,김상열 한국화학공학회 1971 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.9 No.1
The effect of the solid suspension to the gas hold-up in the bubble column was studied where by; (1) The relation between the gas velocity (U_G) and the gas hold-up (1-φ) in the independent bubble flow range (U_G≒0∼7 ㎝/sec) at different specific gravity of solid suspension and its weight was linear, while in the blow up flow range of bubbles the gas hold-up was constant to the gas velocity. (2) In the independent bubbles flow range, the relation among the gas hold-up (1-φ), the specific gravity (ρ) of solid suspension and its weight (W), the gas velocity (U_G) appeared as follows; (1-φ)=0.3567ρ-3.044W-0.4726U_G
김주봉 한국화학공학회 1971 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.9 No.2
The relation between the molar velocity (N), vapor pressure (P_s, P_k.) and mass transfer coefficient (k_g) in the sublimato-tube was studied where by; (1) The results of the calculation through Langmir's equation by the experimental data of heating temperature (t_h), vacuum condensing point (V. C. P), molar velocity of sublimation (N) are shown as follows; P_h/P_s=γ, P_h=γP_s (2) The relation between the vapor pressure (P_s) at the vacuum condensing point, γP_s at the heating temperature and the sublimation velocity (G) was linearly coincident, that is log P_s^n=kG n=0.835∼0.98 log(γP_s)^n'=k'G n'=1.0∼1.51 (3) The relation between the vacuum condensing point and the molar velocity of sublimation was also linear as figure 5. It was shown that we could get the vacuum condensing point by the calculation through the experimental measurement of the velocity of sublimation. (4) The relation between the molar velocity of sublimation, diffusion coefficient, and mass transfer coefficient; The results of the calculation for k_g of Anthracene (D_o=0.0421) through Fick's law at the steady state in the sublimato-tube appeared as table 6 and it was shown that some experimental correcting factor β is necessary between equation(5) and (7). According to the results of the calculation on the correcting factor β, J factor of mass transfer becomes as equation(10).