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RISS 인기검색어
- 검색키워드
- 저자 : Debjit Sanpui (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
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Selection of Mass Transfer Correlations for Rate Based Liquid-Liquid Extraction Model
Sanpui, Debjit,Khanna, Ashok 한국화학공학회 2003 Korean Journal of Chemical Engineering Vol.20 No.4
A rate-based model for mass transfer in liquid-liquid extraction (LLX) has been developed using three distinct stages of drop formation, drop fall or rise and drop coalescence. Binary diffusivities in infinite dilution as well as for concentrated multicomponent mixtures were used to estimate the Maxwell-Stefan binary mass transfer coefficients for both the phases. The mass transfer resistances associated with these coefficients have been categorized in four configurations. Because of the very large number of computations associated with repeated calculations of mass transfer coefficients, a local model has been incorporated. A comparative study between rate-based and non-equilibrium simulator and our bench scale experiments (LLX of toluene-acetone-water system) has been done. The stage-wise composition profiles of acetone in water and toluene phase of the experimental and simulation runs have been compared by using the relative error square analysis. Based on this analysis, best mass transfer combination and mass transfer resistance model has been selected.
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Sanpui, Debjit,Singh, Manish K.,Khanna, Ashok 한국화학공학회 2004 Korean Journal of Chemical Engineering Vol.21 No.2
Mass transfer studies in a laboratory scale extraction column have been conducted for Toluene-Acetone-Water and MIBK-Acetic Acid-Water systems. From these experiments stage-wise solute(Acetone or Acetic-Acid)composition profiles have been obtained for both dispersed and continuous phase. These composition profiles have been compared with those obtained from ASPENLUS, CHEMSEP and LLXSIM simulators. For liquid0liquid equilibrium caculations all these simulators use UNIFAC and UNIQUAC model. The binary interaction parameters for the UNIFAC are inbulit in ASPENPLUS and CHEMSEP, UNIQUAC binary parameters were borrowed from DECHEMA. Error square analysis indicates that simulations based on non-equilibrium option of LLXSIM match closely with experimental results. Temperature profiles and hydrodynamic features characterized by number of drops and static holdup on the stages have been compared between the LLXSIM simulated and the experimental results and these match well. However simulations in ASPENPLUS give sum of relative error-squares for all experimental runs at least len times higher, in spite of tuning the average stage efficiency.
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( Debjit Sanpui ),( Ashok Khanna ) 한국화학공학회 2003 Korean Journal of Chemical Engineering Vol.20 No.4
A rate-based model for mass transfer in liquid-liquid extraction (LLX) has been developed using three distinct stages of drop formation, drop fall or rise and drop coalescence. Binary diffusivities in infinite dilution as well as for concentrated multicomponent mixtures were used to estimate the Maxwell-Stefan binary mass transfer coefficients for both the phases. The mass transfer resistances associated with these coefficients have been categorized in four configurations. Because of the very large number of computations associated with repeated calculations of mass transfer coefficients, a local model has been incorporated. A comparative study between rate-based and non-equilibrium simulator and our bench scale experiments (LLX of toluene-acetone-water system) has been done. The stage-wise composition profiles of acetone in water and toluene phase of the experimental and simulation runs have been compared by using the relative error square analysis. Based on this analysis, best mass transfer combination and mass transfer resistance model has been selected.
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Ashok Khanna,Debjit Sanpui,Manish K. Singh 한국화학공학회 2004 Korean Journal of Chemical Engineering Vol.21 No.2
Mass transfer studies in a laboratory scale extraction column have been conducted for Toluene-Acetone-Water and MIBK-Acetic Acid-Water systems. From these experiments stage-wise solute (Acetone or Acetic-Acid)composition profiles have been obtained for both dispersed and continuous phase. These composition profiles havebeen compared with those obtained from ASPENPLUS, CHEMSEP and LLXSIM simulators. For liquid-liquid equilib-rium calculations all these simulators use UNIFAC and UNIQUAC model. The binary interaction parameters for theUNIFAC are inbuilt in ASPENPLUS and CHEMSEP. UNIQUAC binary parameters were borowed from DECHEMA.Eror square analysis indicates that simulations based on non-equilibrium option of LLXSIM match closely withexperimental results. Temperature profiles and hydrodynamic features characterized by number of drops and staticholdup on the stages have been compared between the LLXSIM simulated and the experimental results and these matchwel. However simulations on ASPENPLUS give sum of relative error-squares for all the experimental runs at least tentimes higher, in spite of tuning the average stage efficiency.
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