RISS 학술연구정보서비스

검색
다국어 입력

http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.

변환된 중국어를 복사하여 사용하시면 됩니다.

예시)
  • 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
  • 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
닫기
    인기검색어 순위 펼치기

    RISS 인기검색어

      검색결과 좁혀 보기

      선택해제

      오늘 본 자료

      • 오늘 본 자료가 없습니다.
      더보기
      • 무료
      • 기관 내 무료
      • 유료
      • KCI등재

        Four phase hydrate equilibria of methane and carbon dioxide with heavy hydrate former compounds: Experimental measurements and thermodynamic modeling

        Farzaneh Feyzi,Hamed Tavasoli 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.8

        We experimentally investigated the hydrate dissociation condition for four phase hydrate (H)-aqueous liquid (LAq)-hydrocarbon rich liquid (LHC)-vapor (V) for the ternary systems of help gas-heavy hydrate former-water. Methane and carbon dioxide are known as help gases and benzene and cyclohexane are considered as heavy hydrate formers. The experimental data were generated using an isochoric pressure-search method. Two different equations of state (EOS) were employed to study the equilibrium phase behavior of ternary four phase systems. The EOSs considered are Valderama-Patel-Teja EOS combined with non-density dependent mixing rule (VPT+NDD) and Statistical Associating Fluid Theory EOS proposed by Huang and Radosz (SAFT-HR). The required binary interaction parameters (BIP) were obtained using vapor-liquid equilibrium (VLE) and liquid-liquid equilibrium (LLE) data. The hydrate phase was modeled by the modification of the solid solution theory of van der Waals and Platteeuw. To obtain reliable results, distortion of cages due to occupation of large molecules was considered. The Kihara parameters of cyclohexane were adjusted to hydrate dissociation data. Model calculations for hydrate forming conditions were found to be in satisfactory agreement with the newly reported data in this work and literature data.

      • KCI등재

        Development of electrolyte SAFT-HR equation of state for single electrolyte solutions

        Azam Najafloo,Farzaneh Feyzi,Ali Taghi Zoghi 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.12

        The explicit version of the mean spherical approximation (MSA) is added to the SAFT-HR equation ofstate (EoS) to model aqueous alkali halide solutions. The proposed electrolyte equation of state (eEoS) has two par-ameters per each ion. Two methods are in common use for calculating ion parameters: ion-based and salt-based. Inthis work, the electrolyte parameters are obtained for 61 single electrolyte solutions using salt-based method. Usingthis approach, mean ionic activity coefficients of the 61 aqueous electrolyte systems were modeled with overall averageabsolute relative percent deviation (AAD%) of 3.91. Also, for testing the ability of the model in terms of ionic par-ameters, six salts (NaCl, NaBr, NaI, KCl, KBr and KI) were studied using ion-based method. The liquid densities, os-motic coefficients and salt mean ionic activity coefficients of 6 aqueous electrolyte solutions were modeled with overallAAD% of 0.68, 2.28 and 0.96, respectively.

      연관 검색어 추천

      이 검색어로 많이 본 자료

      활용도 높은 자료

      해외이동버튼