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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 25, Number 4
JKCSEZ 25(4)
August 20, 1981 

Physical Adsorption of Kr Gas on Graphite Surface : 2D Equation of State

흑연 표면에서의 Kr 기체의 물리흡착
Woon-Sun Ahn, Yong Keun Son, Eun Ah Yoo, Kwang Soon Lee

안운선, 손용근, 류은아, 이광순
흑연 표면(0001)에 흡착한 Kr 분자를 2D 기체로 보고 Kr-흑연의 상호작용 에너지와 Henry 상수 KH를 Fourier series expansion에 의해서 해석함수로 구하였다. 그리고 2D virial계수 B2D와 C2D를 계산하여 2D 상태방정식을 얻었으며, 이것으로 부터 구한 흡착등온곡선을 실험 결과와 비교하였다. 상호작용 에너지는 Lennard-Jones (12, 6) 퍼텐셜의 pairwise additivity로 가정하였으며, 사용한 파라미터는 εgs/k = 70 K, σgs = 0.35 nm, εgg/k = 170 K 및 σgg = 0.37 nm이다.

Assuming krypton molecules adsorbed on graphite surface as 2D gas, the interaction energy of Kr-graphite and the Henry's constant are calculated analytically by the Fourier series expansion method. 2D virial cofficients, B2D and C2D, are also calculated to obtain 2D equation of state, and hence adsorption isotherms. The isotherms so obtained are compared with experimental results reported by Putnam and Fort. The pairwise additivity of Lennard-Jones(12, 6) interaction energy is also assumed, and parameters therein are taken as; εgs/k = 70 K, σgs = 0.35 nm, εgg/k = 170 K, and σgg = 0.37 nm.

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