High Pressure Phase Equilibrium of (Solvent + Salt + CO2) Systems by the Extended Peng-Robinson Equation of State
An extended Peng-Robinson equation of state (EPR-EOS) is used to model the vapor-liquid equilibrium (VLE) in systems containing (water + NaCl + CO2), (water + methanol + NaCl + CO2), (water + Na2SO4 + CO2) and (water + NH4Cl + CO2). The binary and ternary interaction parameters between salt and solv...
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Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
2008-12-01
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doaj-f0d225063fbd48bdb5a6243901aa49512020-11-25T03:46:43ZengIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry & Chemical Engineering 1021-99861021-99862008-12-01274971056952High Pressure Phase Equilibrium of (Solvent + Salt + CO2) Systems by the Extended Peng-Robinson Equation of StateMohammad Nader Lotfollahi0Hadi Baseri1Ali Haghighi Asl2School of Chemical, Gas and Petroleum Engineering, Semnan University, Semnan, I.R. IRANSchool of Chemical, Gas and Petroleum Engineering, Semnan University, Semnan, I.R. IRANSchool of Chemical, Gas and Petroleum Engineering, Semnan University, Semnan, I.R. IRANAn extended Peng-Robinson equation of state (EPR-EOS) is used to model the vapor-liquid equilibrium (VLE) in systems containing (water + NaCl + CO2), (water + methanol + NaCl + CO2), (water + Na2SO4 + CO2) and (water + NH4Cl + CO2). The binary and ternary interaction parameters between salt and solvent are adjusted to experimental mean solvent activity of salts (NaCl and Na2SO4). For the system containing (water + Na2SO4 + CO2), the EPR-EOS is used to predict the P-T diagram when the moles of Na2SO4 in 1 kg water are 0.25, 0.5 and 1. The calculated results for the (water + Na2SO4 + CO2) system by the extended PR-EOS are compared with the correlation results by Anderko-Pitzer EOS. The average absolute deviation of (ΔP/Pexp) % between the correlation results by Anderko-Pitzer EOS and experimental data is 8.4 % while this value for extended PR-EOS is 6 %. The P-x diagram for (water + NH4Cl + supercritical-CO2) system at temperatures (333 and 353 K) are also obtained and compared with the calculation results by VTPRLIFAC model. The average absolute deviation between calculation results by VTPRLIFAC model and experimental data is 7.8 % but this value for our calculations is 6.2 %.http://www.ijcce.ac.ir/article_6952_2f855359ab0c2ae7e98a99846e42276f.pdfvapor-liquid equilibrium (vle)peng-robinson equation of state (pr-eos)co2salt |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mohammad Nader Lotfollahi Hadi Baseri Ali Haghighi Asl |
spellingShingle |
Mohammad Nader Lotfollahi Hadi Baseri Ali Haghighi Asl High Pressure Phase Equilibrium of (Solvent + Salt + CO2) Systems by the Extended Peng-Robinson Equation of State Iranian Journal of Chemistry & Chemical Engineering vapor-liquid equilibrium (vle) peng-robinson equation of state (pr-eos) co2 salt |
author_facet |
Mohammad Nader Lotfollahi Hadi Baseri Ali Haghighi Asl |
author_sort |
Mohammad Nader Lotfollahi |
title |
High Pressure Phase Equilibrium of (Solvent + Salt + CO2) Systems by the Extended Peng-Robinson Equation of State |
title_short |
High Pressure Phase Equilibrium of (Solvent + Salt + CO2) Systems by the Extended Peng-Robinson Equation of State |
title_full |
High Pressure Phase Equilibrium of (Solvent + Salt + CO2) Systems by the Extended Peng-Robinson Equation of State |
title_fullStr |
High Pressure Phase Equilibrium of (Solvent + Salt + CO2) Systems by the Extended Peng-Robinson Equation of State |
title_full_unstemmed |
High Pressure Phase Equilibrium of (Solvent + Salt + CO2) Systems by the Extended Peng-Robinson Equation of State |
title_sort |
high pressure phase equilibrium of (solvent + salt + co2) systems by the extended peng-robinson equation of state |
publisher |
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR |
series |
Iranian Journal of Chemistry & Chemical Engineering |
issn |
1021-9986 1021-9986 |
publishDate |
2008-12-01 |
description |
An extended Peng-Robinson equation of state (EPR-EOS) is used to model the vapor-liquid equilibrium (VLE) in systems containing (water + NaCl + CO2), (water + methanol + NaCl + CO2), (water + Na2SO4 + CO2) and (water + NH4Cl + CO2). The binary and ternary interaction parameters between salt and solvent are adjusted to experimental mean solvent activity of salts (NaCl and Na2SO4). For the system containing (water + Na2SO4 + CO2), the EPR-EOS is used to predict the P-T diagram when the moles of Na2SO4 in 1 kg water are 0.25, 0.5 and 1. The calculated results for the (water + Na2SO4 + CO2) system by the extended PR-EOS are compared with the correlation results by Anderko-Pitzer EOS. The average absolute deviation of (ΔP/Pexp) % between the correlation results by Anderko-Pitzer EOS and experimental data is 8.4 % while this value for extended PR-EOS is 6 %. The P-x diagram for (water + NH4Cl + supercritical-CO2) system at temperatures (333 and 353 K) are also obtained and compared with the calculation results by VTPRLIFAC model. The average absolute deviation between calculation results by VTPRLIFAC model and experimental data is 7.8 % but this value for our calculations is 6.2 %. |
topic |
vapor-liquid equilibrium (vle) peng-robinson equation of state (pr-eos) co2 salt |
url |
http://www.ijcce.ac.ir/article_6952_2f855359ab0c2ae7e98a99846e42276f.pdf |
work_keys_str_mv |
AT mohammadnaderlotfollahi highpressurephaseequilibriumofsolventsaltco2systemsbytheextendedpengrobinsonequationofstate AT hadibaseri highpressurephaseequilibriumofsolventsaltco2systemsbytheextendedpengrobinsonequationofstate AT alihaghighiasl highpressurephaseequilibriumofsolventsaltco2systemsbytheextendedpengrobinsonequationofstate |
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