Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
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Theoretical Approach to Physical Adsorption of Gases on Solid Surfaces

고체 표면 위의 기체 흡착에 관한 이론적 연구

  • Chang, Sei-Hun (Department of Chemistry, Seoul National University) ;
  • Pak, Hyung-Suk (Department of Chemistry, Seoul National University) ;
  • Published : 19700300
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Abstract

The grand canonical ensemble partition function for the adsorbed phase of gases on solid surfaces is derived according to the transient state theory of significant liquid structure. The derived adsorption isotherms from the partition function for argon, nitrogen and benzene adsorbed on various adsorbents are in good agreement with the observed values. The surface pressure, the molar entropy, the molar internal energy and the molar heat of adsorption are calculated for benzene adsorbed on graphite. The molar entropy is minimum at near the pressure where a close packed monolayer is formed. The method of parameter determination is illustrated.

액체 구조의 천이상태 이론을 써서 고체 표면에 기체가 흡착된 계에 대한 상태합을 유도하였다. 이 상태합을 써서 아르곤, 질소, 벤젠 등이 여러 가지 흡착제에 흡착되었을 때의 흡착등온 곡선을 계산하였으며, 이 계산 값들은 측정치와의 좋은 일치를 보여 준다. 그리고 벤젠이 흑연 표면에 흡착되었을 때의 표면압, 물엔트로피, 물에너지, 몰흡착열 들을 계산하였다. 몰엔트로피는 표면이 단분자층으로 완전히 덮였을 때 최소값을 갖는다. 아울러 흡착에 관여된 여러 가지 물리적인 성질들의 계산 방법을 설명하였다.

Keywords

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