Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Modeling of Thermodynamic Properties of Saturated state Hydrogen using Equation of State

상태방정식을 이용한 포화상태 수소의 열역학적 물성 모델링

  • Bong-Seop Lee (Department of Chemical Engineering, Kangwon National University) ;
  • Hun Yong Shin (Department of Chemical and Biomolecular Engineering, Seoul National University of Science & Technology) ;
  • Choong Hee Joe (Hydrogen Product Research Department, Korea Gas Safety corporation)
  • 이봉섭 (강원대학교 화학공학과) ;
  • 신헌용 (서울과학기술대학교 화공생명공학과) ;
  • 조충희 (한국가스안전공사 수소제품연구부)
  • Received : 2023.07.24
  • Accepted : 2023.08.29
  • Published : 2023.11.01
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Abstract

Fossil energy sources are limited in their sustainable use and expansion due to global warming caused by carbon dioxide emissions. Hydrogen is considered as a promising alternative to traditional fossil fuels. To ensure the stable long-term storage, it is necessary to accurately predict its thermodynamic properties at cryogenic temperatures. Therefore, this study aimed to investigate thermodynamic properties, such as saturated vapor pressure and density, enthalpy, and entropy of liquid and gas, using cubic equations of state that demonstrate relatively simple relationships. Among the three types of equations of state (Redlich-Kwong (RK), Soave-Redlich-Kwong (SRK), and Peng-Robinson (PR)), the SRK model exhibited relatively accurate prediction results for various physical properties.

탄화수소기반의 화석연료 에너지원은 이산화탄소 배출로 인한 지구온난화 문제로 지속적인 이용 및 확장에 제한이 있다. 수소는 전통적인 화석연료에 대한 유망한 대안으로 여겨지고 있다. 수소의 안정적인 장기저장을 위해서 극저온인 포화상태에서 수소의 열역학적 물성에 대한 예측이 요구된다. 따라서 본 연구에서는 비교적 간단한 관계식을 보이는 3차 상태방정식들을 이용하여 포화상태의 열역학적 물성들(포화증기압, 액체 및 기체의 밀도, 엔탈피 및 엔트로피)을 모사하였다. 포화상태 수소에 대한 여러가지 열역학적 물성들을 비교한 결과 3 종류(Redlich-Kwong (RK), Soave-Redlich-Kwong (SRK), Peng-Robinson (PR))의 상태방정식 중 SRK 모델이 비교적 정확한 예측결과를 보였다.

Keywords

Acknowledgement

본 연구는 산업통상자원부 및 한국에너지기술평가원(KETEP)의 연구비지원(연구개발 과제번호. 20227310100090)을 받아 수행한 연구 과제입니다.

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