Articles & Issues

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

All issues

농도-펄스법에 의한 기체 삼성분계 흡착 등온식의 산출

Determination of Adsorption Isotherms of Gaseous Ternary System by Concentration-pulse Technique

김부웅 구헌서

Kim BU Koo HS

HWAHAK KONGHAK, April 1996, 34(2), 165-170(6), NONE

Download PDF

Abstract

선형흡착평형상수(k₁)를 포함한 삼성분계(흡착기능 물질 2 + 운반기체 1)의 흡착 모델 식을 C₁/C₁=k₁+α₁ C₁^m1 + β₁₂ C₂ⁿ¹²와 같이 설정하고, 이성분계(흡착기능 물질 1 + 운반기체 1)에 대하여 크로마토그래피-perturbation방법 중 농도-펄스기법(concentration-pulse technique)과 모멘트 분석에 의한-에 의하여 설정된 삼성분계 모델식의 변수값을 산출하였으며 이를 크로마토그래픽에 의한 삼성분계 실험으로 확인하므로써 정적인 방법(static method)에 의하여 검증하던 종전의 과정을 크로마토그래피 자체만으로 수행할 수 있었다. 그 결과 설정된 모델식으로 계의 해석이 가능하였고 농도-펄스기법의 적용을 흡착 가능한 물질 2종과 흡착평형상수로부터 benzene, n-octane, chloroform의 흡착열(H_ad)을 van’t Hoff식에 의하여 -10.07, -8.66, -6.26kcal/gmol로 각각 구하였다.

The model of adsorption isotherm for ternary system contained 1 non-adsorbable and 2 adsorbable species was set up as C₁/C₁=k₁+α₁C₁^m1+β₁₂C₂ⁿ¹². The parameters in model equation were produced from adsorption experi-ments of binary system(adsorbable species 1+non-adsorbale species 1) by concentration-pulse technique of perturba-tion method, and moment analysis. The isotherm equations of ternary systems were verified by ternary system experi-ments with only gas chromatography itself, without static method. Therefore it is possible the application of concentra-tion-pulse technique to extend to the ternary gas system contained 1 non-adsorbable and 2 adsorbable species. And the adsorption heats(H_ad) of benzene, n-octane, and chloroform was calculated by van’t Hoff equation with adsorption equilibrium coefficients by moment analysis as -10.07, -8.66, -6.26kcal/gmol respectively.

Keywords

Adsorption Adsorption Equilibrium Perturbation Concentration-pulse

References

Yang TR, "Gas Separation by Adsorption Processes," Butterworths, Boston (1987)
Eberly PE, Kimberlin CN, Trans. Faraday Soc., 57, 1169 (1961)
James DH, Phillips CSG, J. Chem. Soc., 1066 (1954)
Stalkup FI, Deans HA, AIChE J., 9, 106 (1963)
Helfferich F, Peterson DL, Science, 142, 661 (1963)
Danner PR, Nicoletti NP, Al-Ameeri RS, Chem. Eng. Sci., 35, 2129 (1980)
Hyun SH, "Gas-Mixture Adsorption Isotherms and Diffusivities in Molecular Sieve by Perturbation Chromatography," Doctoral Dissertation, the Pennsylvania State Univ., Pa. (1982)
Conder JR, Young CL, "Physicochemical Measurement by Gas Chromatography," John Wiley & Sons, NY (1979)
VanderWlist E, VanderMeijden J, J. Chromatogr., 79, 1 (1973)
Ruthven DM, Kumar R, Ind. Eng. Chem. Fundam., 19, 27 (1980)
Hyun SH, AIChE Symp. Ser., 78, 19 (1982)
Barker PE, Thawait S, J. Chromatogr., 295, 479 (1984)
Ruthven DM, J. Chromatogr., 351, 337 (1986)
Schneider P, AIChE J., 14, 886 (1968)
Kim BU, Koo HS, HWAHAK KONGHAK, 31(4), 422 (1993)
Deans HA, Horn FJM, Klauser G, AIChE J., 56, 426 (1970)
Motoyuki S, "Adsorption Engineering," Elsevier, NY (1990)
Glueckauf E, Disc. Faraday Soc., 7, 12 (1949)
Helfferich F, Klein G, "Multicomponent Chromatography," Marcel Dekker Inc. (1970)
Schneider P, Smith JM, AIChE J., 14, 762 (1968)