Korean Chemical Engineering Research

  • 제43권2호
  • /
  • Pages.249-258
  • /
  • 2005
  • /
  • 0304-128X(pISSN)
  • /
  • 2233-9558(eISSN)
한국화학공학회 (The Korean Institute of Chemical Engineers)
권호 표지

수소/메탄 혼합 기체로부터 수소 분리를 위한 두 탑 PSA 실험과 전산 모사

Experiment and Simulation of 2-bed PSA for Hydrogen Separation from H2/CH4 Gas Mixture

  • 남기문 (한국과학기술연구원 청정기술연구센터) ;
  • 정병만 (한국과학기술연구원 청정기술연구센터) ;
  • 강석현 (한국과학기술연구원 청정기술연구센터) ;
  • 이창하 (연세대학교 화학공학과) ;
  • 이병권 (한국과학기술연구원 청정기술연구센터) ;
  • 최대기 (한국과학기술연구원 청정기술연구센터)
  • Nam, Gi-Moon (Clean & Technology Research Center, Korea Institute of Science and Technology) ;
  • Jeong, Byung-Man (Clean & Technology Research Center, Korea Institute of Science and Technology) ;
  • Kang, Seok-Hyun (Clean & Technology Research Center, Korea Institute of Science and Technology) ;
  • Lee, Chang-Ha (Department of Chemical Engineering, Yonsei University) ;
  • Lee, Byung-Kwon (Clean & Technology Research Center, Korea Institute of Science and Technology) ;
  • Choi, Dae-Ki (Clean & Technology Research Center, Korea Institute of Science and Technology)
  • 투고 : 2004.09.22
  • 심사 : 2005.01.03
  • 발행 : 2005.04.30
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초록

활성탄을 흡착제로 하여 2탑 6단계의 PSA(압력 순환식 흡착) 공정을 통하여 수소/메탄(부피비로 60%/40%)의 이성분 혼합기체에서 수소를 분리하는 연구를 수행하였다. PSA 공정에서 순도 및 회수율에 영향을 미치는 흡착압력, 공급 가스 유량, P/F 비를 변수로 하여 실험과 전산모사를 수행하였다. 본 공정에서 정상 상태는 15 cycle 이후에 도달하는 것을 알 수 있었다. P/F 비와 압력이 증가하고 공급 유량이 감소할 때 수소의 순도가 증가하였고, 반면에 회수율이 감소하는 것을 알 수 있었다. PSA 공정 전산 모사와 실험을 토대로 순도와 회수율이 최대일 때 최적의 PSA 운전 조건을 정하였다. 최적의 운전 조건은 공급가스의 유량이 22 LPM이고, 흡착 압력이 11 atm이며, P/F 비는 0.10으로 나타났고, 그 결과 수소의 회수율은 75% 이상 얻어졌으며, 순도는 99% 이상의 수소를 얻을 수 있었다. 본 연구에서는 비등온 비단열 상태를 고려하였으며, LDF(linear driving force) 모델과 LRC(loading ratio correlation) 등온식을 고려하여 실험과 예상치를 비교하였다.

A two-column six-step pressure swing adsorption(PSA) process was to study separation of hydrogen from hydrogen and methane($60_{vol}%/40_{vol}%$) binary system onto activated carbon adsorbent. The effects of the feed gas pressure, the feed flowrate and the P/F(purge to feed) ratio on the process performance were evaluated. The cyclic steady-states of PSA process were reached to after 15 cycles. $H_2$ purity increases according as the P/F ratio and pressure increase and the feed flow rate decreases; however, $H_2$ recovery shows an opposite phenomena to the purity. PSA process simulation studied to find optimum operation condition. In the results, 22 LPM feed flowrate, 11 atm adsorption pressure and 0.10 P/F ratio might be optimal values to obtain more than 75% recovery and 99% purity hydrogen. In this study was non-isothermal and non-adiabatic model considering linear driving force(LDF) model and Langmuir-Freundlich adsorption isotherm considered to compare between prediction and experimental data.

키워드

과제정보

연구 과제 주관 기관 : 에너지관리공단, 한국가스공사

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