회분식 제올라이트계에서 Cs 및 Sr의 이온교환속도 연구

이일희; 유재형; 박현수

Journal of the Korean Industrial and Engineering Chemistry, Vol.4, No.4, 739-745, December, 1993

Export Citation

회분식 제올라이트계에서 Cs 및 Sr의 이온교환속도 연구

Ion Exchange Kinetics for Cs and Sr in a Batch Zeolite System

이일희, 유재형, 박현수

초록

본 연구에서는 제올라이트에 의하여 Cs 및 Sr을 분리하는 무기이온 교환계에 있어서 물질전달 특성을 규명하는데 중점을 두었다. Cs이온의 경우 선택도가 우수한 AW300 및 AW500 제올라이트, Sr이온의 경우는 4A, 13X 제올라이트를 각각 선정하여 물질전달실험을 수행하였다. 실험조건으로는 25℃, 교반속도 300rpm, 제올라이트량 4g, Cs 및 Sr 용액의 농도, 부피는 각각 1000ppm, 2000ppm의 0.5ℓ에서 회분식의 이온교환 방식을 채택하였다. 물질전달속도는 경막내 확산에 의해 지배됨을 알았으며, 경막 내 물질 전달계수는 10^-4∼10^-3cm/sec, 입자내 겉보기 확산계수는 10^-8cm²/sec의 차수를 나타내었다.

The characteristics of mass transfer in an inorganic ion exchange system where Cs and/or Sr are separated by means of zeolites was investigated. Experimental work to separate Cs or Sr was carried out for Cs-AW300 and CS-AW500 systems in case of Cs whereas for Sr-4A and Sr-l3X systems in case of Sr. The experimental conditions were chosen as follows in the batch type separation : temperature 25℃, agitation speed 300rpm, amount of zeolite 4g, volume of solution 0.5ℓ, and concentrations of solution 1000ppm, 2000ppm, respectively. As a result, it was found that the mass transfer rate is controlled mainly by the liquid film diffusion. The mass transfer coefficients in the film were found to be in the range of 10^-4∼10^-3cm/sec, while the apparent diffusivity inside the particles was found to be in the order of 10^-8cm²/sec.

[References]

Liapis AI, Rippin DWT, Chem. Eng. Sci., 32, 619 (1977)
McKay G, AIChE J., 30, 692 (1984)
Miller COM, Clump CW, AIChE J., 16, 169 (1970)
Sphan H, Schlunder EU, Chem. Eng. Sci., 30, 529 (1975)
Costa C, Rodrigues A, Chem. Eng. Sci., 40, 983 (1985)
Hills JH, Chem. Eng. Sci., 41, 2779 (1986)
Helfferich F, "Ion-exchange," 250, McGraw-Hill Book Company, New York (1962)
Huang TC, Li KU, Ind. Eng. Chem. Fundam., 12, 50 (1973)
Hashmoto KS, Miura K, Nagata S, J. Chem. Eng. Jpn., 8, 367 (1975)
Crank J, "The Methematics of Diffusion," 2nd Edit., 93, Clarendon Press, Oxford (1975)
Bolton AP, "Molecular Sieve Zeolite," Union Carbide Catalysts
Ames LL, Am. Miner., 50, 465 (1965)
Hung TC, Tseng TT, J. Inorg. Nucl. Chem., 31, 183 (1969)

[Referenced By]

[1] Liapis AI, Rippin DWT, Chem. Eng. Sci., 32, 619 (1977)

[2] McKay G, AIChE J., 30, 692 (1984)

[3] Miller COM, Clump CW, AIChE J., 16, 169 (1970)

[4] Sphan H, Schlunder EU, Chem. Eng. Sci., 30, 529 (1975)

[5] Costa C, Rodrigues A, Chem. Eng. Sci., 40, 983 (1985)

[6] Hills JH, Chem. Eng. Sci., 41, 2779 (1986)

[7] Helfferich F, "Ion-exchange," 250, McGraw-Hill Book Company, New York (1962)

[8] Huang TC, Li KU, Ind. Eng. Chem. Fundam., 12, 50 (1973)

[9] Hashmoto KS, Miura K, Nagata S, J. Chem. Eng. Jpn., 8, 367 (1975)

[10] Crank J, "The Methematics of Diffusion," 2nd Edit., 93, Clarendon Press, Oxford (1975)

[11] Bolton AP, "Molecular Sieve Zeolite," Union Carbide Catalysts

[12] Ames LL, Am. Miner., 50, 465 (1965)

[13] Hung TC, Tseng TT, J. Inorg. Nucl. Chem., 31, 183 (1969)