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The Membrane Society of Korea (한국막학회)
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Prediction of Propylene/Propane Separation Behavior of Na-type Faujasite Zeolite Membrane by Using Gravimetric Adsorption

중량식흡착 거동에 기초한 Na형 Faujasite 제올라이트 분리막의 프로필렌/프로페인 분리 거동 예측 연구

  • Hwang, Juyeon (Department of Energy Science and Technology, Graduate School of Energy Science and Technology (GEST), Chungnam National University) ;
  • Min, Hae-Hyun (Department of Energy Science and Technology, Graduate School of Energy Science and Technology (GEST), Chungnam National University) ;
  • Park, You-In (Center for Convergent Chemical Process, National Research Council of Science & Technology) ;
  • Chang, Jong-San (Center for Convergent Chemical Process, National Research Council of Science & Technology) ;
  • Park, Yong-Ki (Center for Convergent Chemical Process, National Research Council of Science & Technology) ;
  • Cho, Churl-Hee (Department of Energy Science and Technology, Graduate School of Energy Science and Technology (GEST), Chungnam National University) ;
  • Han, Moon-Hee (Department of Energy Science and Technology, Graduate School of Energy Science and Technology (GEST), Chungnam National University)
  • 황주연 (충남대학교 에너지과학기술대학원 에너지과학기술학과) ;
  • 민혜현 (충남대학교 에너지과학기술대학원 에너지과학기술학과) ;
  • 박유인 (국가과학기술연구회 CCP융합연구단) ;
  • 장종산 (국가과학기술연구회 CCP융합연구단) ;
  • 박용기 (국가과학기술연구회 CCP융합연구단) ;
  • 조철희 (충남대학교 에너지과학기술대학원 에너지과학기술학과) ;
  • 한문희 (충남대학교 에너지과학기술대학원 에너지과학기술학과)
  • Received : 2018.12.28
  • Accepted : 2018.12.31
  • Published : 2018.12.31
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Abstract

In this study, propylene/propane separation behavior of Na-type faujasite zeolite membranes is predicted by observing gravimetric adsorptions of propylene and propane on zeolite 13X. The gravimetric adsorptions were measured by using a magnetic suspension balance (MSB) at temperatures of 323, 343, 363 K and a pressure range of 0.02-1 bar. The pressure was increased at 0.1 bar intervals. As adsorption temperature increased, adsorptions of propylene and propane decreased and propylene/propane adsorption selectivity increased. Also, the diffusion coefficients of propylene and propane were increased as the adsorption temperature increased, following the Arrhenius equation. The maximum propylene/propane diffusion selectivity was 0.9753 at 323 K. The perm-selectivity was calculated from the adsorption data of zeolite 13X and compared with the perm-selectivity measured in the single gas permeation experiment for the Na-type faujasite zeolite membrane. The maximum values for the calculated and measured perm-selectivities were observed at a temperature of 323 K. It could be concluded that the prediction of propylene/propane separation of surface diffusion-based membrane by using gravimetric adsorption data is reasonable. Therefore, it is expected that this prediction method can be applied to the screening of adsorption-based microporous membrane for propylene/propane separation.

본 연구에서는 Na형 Faujasite 제올라이트 분리막의 프로필렌/프로페인 분리 거동을 예측하기 위하여 제올라이트 13X 입자의 프로필렌 및 프로페인 단일기체에 대한 중량식흡착 거동을 관찰하고자 하였다. 제올라이트 13X 입자의 프로필렌 및 프로페인에 대한 중량식흡착 거동은 자성부유평형저울(MSB)을 이용하여 323, 343, 363 K의 온도와 0.02-1 bar의 압력 범위에서 0.1 bar씩 증가시키면서 측정되었다. 그 결과, 온도가 증가할수록 프로필렌 및 프로페인의 흡착량은 감소하였으며, 프로필렌/프로페인의 흡착 선택도는 증가하였다. 또한 흡착 온도가 증가함에 따라 프로필렌과 프로페인의 확산계수는 증가하여 아레니우스 식을 따랐고, 프로필렌/프로페인 확산 선택도는 323 K에서 0.9753으로 최대값을 가졌다. 흡착 특성을 통해 분리막의 투과선택도를 계산하였고, Na형 Faujasite 제올라이트 분리막의 단일 기체 투과 특성과 비교하였다. 그 결과 계산된 투과선택도와 측정된 투과선택도가 모두 323 K에서 최대값을 갖는 것을 확인하였다. 따라서 본 연구에서는 중량식 흡착법으로 예측된 분리막의 프로필렌/프로페인 분리거동 예측이 합리적이며 또한 표면확산에 기반한 프로필렌/프로페인 분리용 제올라이트 분리막의 분리성능예측에 적용될 수 있음을 알 수 있었다.

Keywords

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