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Search / Korean Journal of Chemical Engineering
HWAHAK KONGHAK,
Vol.29, No.6, 646-653, 1991
한외여과에서 막 표면 농도 예측과 Sherwood 수 상관관계식 보정
Estimation of Solute Concentration at Membrane Surface and Sherwood Number Correlation Modification in Ultrafiltration
조현수, 오준택, 이호원, 김우식
평판형 한외여과 cell에서 dextran 500T 용액의 한외여과 실험을 행하여 조작 조건의 변화에 따른 막 표면 농도를 예측하고, 농도분극층 내의 밀도, 점도 및 확산계수 등의 물리적 성질 변화를 고려한 Sherwood 수 상관관계식을 제시하여 이의 타당성을 검토하였는 바, 농도분극 현상이 큰 경우 기존의 상관관계식에서 나타난 오차를 줄일 수 있었으며 이 때의 관계식은 다음과 같이 나타낼 수 있었다. NSh = 0.073ㆍNRe0.061ㆍNSc0.33ㆍ[NSc/NScm]-0.25 (삼투압 모델) NSh = 0.045ㆍNRe0.067ㆍNSC0.33ㆍ[NSc/NScm]-0.20 (경계층 저항 모델)
Concentrations at membrane surface were predicted from ultrafiltration experiments of dextran 500T solution in a flat plate. From this results, considering the change of physical properties in boundary layer, modified Sherwood number correlation was introduced. This correlation reduced the errors for opera-tion pressure difference variation. The modified Sherwood number correlation equations are as follows: NSh=0.073ㆍNRe0.061ㆍNSc0.33ㆍ[NSc/NScm]-0.25 (osmotic pressure model) NSh=0.045ㆍNRe0.067ㆍNSc0.33ㆍ[NSc/NScm]-0.20 (boundary layer resistance model)
[References]
  1. Ferry JD, Chem. Rev., 18, 373, 1936
  2. Loeb S, Sourirajan S, UCLA Eng. Report No. 60-60, 1960
  3. White RE, Pintauto PN, "Industrial Membrane Processes," AIChE Symp. Series, Vol. 82, No. 248, NY, 1986
  4. Blatt WT, Dravid A, Michaels AS, Nelson L, "Separation Polarization and Cake Formation in Membrane Ultrafiltration: Cause, Consequences and Control Techniques," in Membrane Science and Technology, 47, Plenum Press, New York, 1970
  5. Goldsmith RL, Ind. Eng. Chem. Fundam., 10, 113, 1971
  6. Kozinski AA, Lightfoot EN, AIChE J., 17, 81, 1971
  7. Wijmans JG, Nakao S, Smolders CA, J. Membr. Sci., 20, 115, 1984
  8. Wijmans JG, Nakao S, Vandenverg JWA, Troelstra FR, Smolder CA, J. Membr. Sci., 22, 117, 1985
  9. Minjinlieff PF, Jaspers WJM, Trans. Faraday Soc., 67(6), 1837, 1971
  10. Williams JW, "Ultrafiltration of Macromolecules," Academic Press, New York, 1972
  11. Josson G, Desalination, 51, 61, 1984
  12. Vassilis G, Bengt H, J. Membr. Sci., 30, 153, 1987
  13. Lafaille JP, Sanchez V, Mahenc J, Int. Chem. Eng., 27(2), 258, 1987
  14. Cheryan M, "Ultrafiltration Handbook," Technomic Publishing Company, Inc., Langcaster, 1986
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