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이온교환한 제올라이트 A의 연료기체분자 저장특성-II. Cs-A제올라이트내 수소의 확산
Fuel Gas Encapsulation in Ion-Exchanged Zeolite A-II. Hydrogen Diffusion in Cs-A Zeolite
HWAHAK KONGHAK, December 1991, 29(6), 717-726(10), NONE
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Abstract
승온 decapsulation과정에서 Cs-A 제올라이트 내부의 수소확산을 연구하였다. 확산계수의 측정에 최소자승법에 의한 실험응답의 fitting을 제시하였다. 수학적 처리로서 확산계수의 측정에 잘 알려진 승온탈착에 대한 식과 유사한 식(14)를 제공하였으나 여기에서 결정된 확산계수로부터 계산된 응답은 실험응답과 상당한 차이를 보였다. Fitting 방법으로 α-cage로의 확산계수와 β-cage로의 확산계수를 동시에 측정할 수 있었으며 α-cage로의 확산계수는 β-cage로의 확산계수보다 100배 이상 컸다.
Hydrogen diffusion in Cs-A zeolite during temperature programmed decapsulation is studied. Fitting of experimental responses by the method of least squares is proposed for estimation of the diffusivity. Although a mathematical treatment provided a simple equation[Eq. (14)], which is analogous to the well known equation for temperature programmed desorption, for estimating the diffusivity, responses calculated with the diffusivity from Eq.(14)deviated significantly from experimental responses. The method of fitting allowed simultaneous estimation of the diffusivities into α-cage and β-cage, and the diffusivity of hydrogen intoα-cage were more then on hundred times larger than that into β-cage.
References
Sesny WJ, Shaffer LH, U.S. Patent, 3,316,691 (1967)
Barrer RM, Vaughan DEW, Surf. Sci., 14, 77 (1969)
Barrer RM, Vaughan DEW, Trans. Faraday Soc., 67, 2129 (1971)
Barrer RM, Vaughan DEW, J. Phys. Chem. Solids, 32, 731 (1971)
Fraenkel D, J. Chem. Soc.-Faraday Trans., 77, 2041 (1981)
Fraenkel D, Ittah B, Levy M, J. Chem. Soc.-Chem. Commun., 1391 (1984)
Fraenkel D, J. Chem. Soc.-Faraday Trans., 77, 2029 (1981)
Kim DH, AIChE J., 35, 343 (1989)
Cvetanovic RJ, Anemomiya Y, Catal. Rev.-Sci. Eng., 6, 21 (1972)
Chan Y, Anderson RB, J. Catal., 50, 319 (1977)
Paryjczak T, "Gas Chromatography in Adsorption and Catalysis," John Wiley and Sons, p. 186-199 (1986)
Heo NH, Rho BR, Kim DH, Kim JT, HWAHAK KONGHAK, 29(4), 407 (1991)
Breck D, "Zeolite Molecular Sieves," John Wiley & Sons, New York, NY (1974)
Kuester J, Mize J, "Optimization Techniques with Fortran," McGraw-Hill (1973)
Barrer RM, Vaughan DEW, Surf. Sci., 14, 77 (1969)
Barrer RM, Vaughan DEW, Trans. Faraday Soc., 67, 2129 (1971)
Barrer RM, Vaughan DEW, J. Phys. Chem. Solids, 32, 731 (1971)
Fraenkel D, J. Chem. Soc.-Faraday Trans., 77, 2041 (1981)
Fraenkel D, Ittah B, Levy M, J. Chem. Soc.-Chem. Commun., 1391 (1984)
Fraenkel D, J. Chem. Soc.-Faraday Trans., 77, 2029 (1981)
Kim DH, AIChE J., 35, 343 (1989)
Cvetanovic RJ, Anemomiya Y, Catal. Rev.-Sci. Eng., 6, 21 (1972)
Chan Y, Anderson RB, J. Catal., 50, 319 (1977)
Paryjczak T, "Gas Chromatography in Adsorption and Catalysis," John Wiley and Sons, p. 186-199 (1986)
Heo NH, Rho BR, Kim DH, Kim JT, HWAHAK KONGHAK, 29(4), 407 (1991)
Breck D, "Zeolite Molecular Sieves," John Wiley & Sons, New York, NY (1974)
Kuester J, Mize J, "Optimization Techniques with Fortran," McGraw-Hill (1973)
