서지주요정보
실리카겔에 대한 크레졸 이성질체의 흡착 평형 및 step gradient elution chromatography = Adsorption equilibria of cresol isomer onto silica gel and step gradient elution chromatography
서명 / 저자 실리카겔에 대한 크레졸 이성질체의 흡착 평형 및 step gradient elution chromatography = Adsorption equilibria of cresol isomer onto silica gel and step gradient elution chromatography / 안혁준.
저자명 안혁준 ; Ahn, Hyeok-Jun
발행사항 [대전 : 한국과학기술원, 1990].
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소장정보

등록번호

8000901

소장위치/청구기호

학술문화관(문화관) 보존서고

MCE 9013

SMS전송

도서상태

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반납예정일

초록정보

Adsorption equilibria for Cresol isomers onto silica gel in n-hexane were investigated in the concentration range of 1-30 mol/$m^3$. The affinity with respect to silica gel decreased in sequence of p-, m-, o-Cresol in single component system. The model presented by Jain and Snoeyink well predicted the experimental results in the group used only the isotherm parameters of single component system. And the model proposed by Fritz and Schlunder had the lowest average percent deviations in the group used binary experimental data. The adsorbed amounts of m-Cresol were more influenced by o-Cresol than those of p-Cresol. Thus the separability of m-/p-Cresol mixture became large as the concentration of o-Cresol increased and these phenomena were caused by inductive adsorption created by steric hindrance between coadsorbed molecules. Adsorption characteristics of Cresol isomers were investigated by the single column chromatography packed with silica gel. The eluents were composed of n-hexane and ethyl acetate. Solvent composition instead of temperature could be used as a good driving force to separate a mixture. Equilibrium constant and rate parameters were obtained by the method of moments. The equlibrium constant and intraparticle mass transfer coefficient estimated for each component were empirically correlated with solvent compositions in an exponential function. The axial dispersion mass transfer resistance was significantly larger than the others. The agreement between the experimental and theoretical results calculated by orthogonal collocation method was excellent. The criteria for maximizing throughput was developed in volumn overloading condition. To overcome the disadvantage in the conventional chromatography, the step gradient elution chromatography was applied and the model equation considered for all kinetic mechanisms in this operation method was developed. From this step gradient operation method, the more efficient elution than that of conventional chromatography was obtained.

서지기타정보

서지기타정보
청구기호 {MCE 9013
형태사항 [ix], 117, [1] p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Hyeok-Jun Ahn
지도교수의 한글표기 : 이원국
지도교수의 영문표기 : Won-Kook Lee
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 112-117
주제 Adsorption.
크로마토그래피 검축기. --과학기술용어시소러스
흡착. --과학기술용어시소러스
Chromatography analysis.
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