| Issue |
HWAHAK KONGHAK,
Vol.26, No.3, 280-287, 1988
Vol.26, No.3, 280-287, 1988
묽은 고분자 수용액의 충류막에서 CO2의 물리적 흡수
Physical Absorption of CO2 in Laminar Falling Films of Dilute Polymeric Solutions
젖은 벽탑을 사용하여 뉴톤액체（PEG 수용액）와 지수법에 일치하는 비뉴톤액체(CMC 수용액)에 CO2 기체를 흡수시켜 CO2의 확산계수를 고분자 분자량 변화에 따라 측정하였다. 확산계수와 용액의 점도와의 관계를 다음과 같은 실험식으로 나타내었다.
25 ℃의 PEG 수용액에 대해서
D = 1.78×10-5·μ-（15.66/Mp0.515）
20 ℃ CMC수용액에 대해서
D = 1.57×10-5·μapp（78.18/Mp0.530）
25 ℃의 PEG 수용액에 대해서
D = 1.78×10-5·μ-（15.66/Mp0.515）
20 ℃ CMC수용액에 대해서
D = 1.57×10-5·μapp（78.18/Mp0.530）
Diffusion coefficients of CO2 in aqueous Newtonian solution of PEG（polyethylene glycol） and power-law non-Newtonian solution of CMC (sodium carboxymethyl cellulose) with molecular weights varying from 600 to 8,400 and from 32,300 to 136,800, respectively, were obtained from absorption rate measurements in a wetted-wall column. The diffusivity-viscosity relation is found to be a strong function of the molecular weight of the applied polymers. The data suggest thd following correlations.
For PEG solution at 25 ℃
D = 1.78×10-5·μ-（15.66/Mp0.515）
For CMC solution at 20℃,
D = 1.57×10-5·μapp（78.18/Mp0.530）
The diffusivity of CO2 in CMC solution was constant with respect to the change of the shear rate at the wall in the studied range of flow rate.
For PEG solution at 25 ℃
D = 1.78×10-5·μ-（15.66/Mp0.515）
For CMC solution at 20℃,
D = 1.57×10-5·μapp（78.18/Mp0.530）
The diffusivity of CO2 in CMC solution was constant with respect to the change of the shear rate at the wall in the studied range of flow rate.
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