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Research paper thumbnail of Measurement and correlation of vapour-liquid equilibria for cyclopentylmethylether + acetic acid at atmospheric pressure

Experimental vapour-liquid equilibrium (VLE) for binary mixtures composed of 1-(ethoxymethoxy)-pr... more Experimental vapour-liquid equilibrium (VLE) for binary mixtures composed of 1-(ethoxymethoxy)-propane with ethanol and 1-propanol at 101.33 kPa was measured. The experimental data of saturated vapour pressure for 1-(ethoxymethoxy)-propane was measured. The measurements were performed using an improved Rose equilibrium still. Two binary systems present a minimum boiling azeotropes at 101.33 kPa, in which the azeotropic temperature and composition are 351.45 K and 95.98 mole%(ethanol) and 369.44 K and 81.30 mole%(1-propanol), respectively. The VLE experimental values were correlated with the help of the NRTL, Wilson, and van Laar models for which the binary interaction parameters are reported. The results showed that the measurements have a good correlation under the NRTL and Wilson models about two binary systems, respectively. The thermodynamic consistency of the VLE experimental data was checked using the traditional area test and the direct test methods.

Research paper thumbnail of Solubility and Thermodynamics Profile of Benzethonium Chloride in Pure and Binary Solvents at Different Temperatures

Research paper thumbnail of Isobaric Vapour–Liquid Equilibrium Data Measurement for a Binary System of Green Solvent 2-Methyltetrahydrofuran and Acetic acid at 101.3 kPa

Arabian journal for science and engineering, Nov 28, 2018

Green solvents are eco-friendly solvents that can play significant role in the reduction in healt... more Green solvents are eco-friendly solvents that can play significant role in the reduction in health hazard and safety issues caused by classical solvents. The use of green solvents can be supported and enhanced by providing the data banks of these solvents, particularly vapour-liquid equilibrium (VLE) data that are required for the design of separation systems. A dynamic VLE still based on the Raal modification of Yerazunis et al. (1964) apparatus was employed in the measurement of isobaric VLE data. The VLE still was maintained at 101.3 kPa pressure. The thermodynamic consistency of the measured VLE data was confirmed by Herington's area test and Van Ness's point-to-point test. The correlation of VLE data was established by excess Gibbs energy models NRTL, Wilson and UNIQUAC and the result showed that all three models were in good agreement with the experimental data. The absolute average deviation in temperature was 0.3953 K, 0.3823 K, 0.3977 K and the absolute average deviation in vapour-phase composition was 0.0053, 0.0052, 0.0053 for NRTL, Wilson and UNIQUAC models, respectively. The relative volatility chart of 2-MeTHF/Acetic acid versus 2-MeTHF liquid mole fraction showing ± 5% deviation of experimental data from Wilson model data was also depicted. The comparison of the experimental VLE data with the data predicted by UNIFAC and modified UNIFAC Dortmund methods was made. The VLE data were generated through binary interaction parameters from Aspen Hysys for Wilson, NRTL and UNIQUAC models and compared with the experimental data. Keywords Green solvents • Vapour liquid equilibria • Dynamic VLE still • 2-Methyltetrahydrofuran • Acetic acid List of symbols A i , B i , C i Antoine equation constants g i j Energy parameter characteristic of the i-j interaction in the NRTL equation This research paper has been a part of the research project funded by Gujarat Council on Science and Technology (GUJCOST) by awarding minor research project (MRP) grant worth INR 520,000.00 to the project "Experimental Determination of Vapour-Liquid Equilibrium of Systems Comprising Green Solvents".

Research paper thumbnail of Isobaric Vapor–Liquid Equilibrium Data for Tetrahydrofuran + Acetic Acid and Tetrahydrofuran + Trichloroethylene Mixtures

Journal of Chemical & Engineering Data, Jan 27, 2023

Research paper thumbnail of Solubility and Thermodynamics Profile of Benzethonium Chloride in Pure and Binary Solvents at Different Temperatures

Research paper thumbnail of Isobaric Vapor–Liquid Equilibrium Data for Tetrahydrofuran + Acetic Acid and Tetrahydrofuran + Trichloroethylene Mixtures

Journal of Chemical & Engineering Data

Research paper thumbnail of Vapor-Liquid Equilibrium Data Prediction by Advanced Group Contribution Methods for a Binary System of Cyclopentyl Methyl Ether and Cyclopentanol at Atmospheric Pressure

The isobaric vapor-liquid equilibrium data predictions for the binary system of cyclopentyl methy... more The isobaric vapor-liquid equilibrium data predictions for the binary system of cyclopentyl methyl ether and cyclopentanol were obtained using UNIFAC and modified UNIFAC Dortmund method. Group identification was done by using artist free software with Dortmund Data Bank . The interaction parameters in the UNIFAC and modified UNIFAC Dortmund method, for the ether group (-CH3O) and alcohol (-OH), were used to predict VLE data. Thermodynamic consistency of the predicted VLE data had been checked by the Herington method. The predicted data were correlated with Van Laar, Wilson and NRTL activity coefficient models. The binary interaction parameters of models had been obtained by regression. The predicted VLE data of UNIFAC method were fitted much more accurately than that of modified UNIFAC Dortmund method by these activity coefficient models Van Laar, Wilson and NRTL.

Research paper thumbnail of Liquid–Liquid Extraction of Formic Acid with 2-Methyltetrahydrofuran: Experiments, Process Modeling, and Economics

Industrial & Engineering Chemistry Research

Formic acid (FA) is an interesting hydrogen (H 2) and carbon monoxide (CO) carrier that can be pr... more Formic acid (FA) is an interesting hydrogen (H 2) and carbon monoxide (CO) carrier that can be produced by the electrochemical reduction of carbon dioxide (CO 2) using renewable energy. The separation of FA from water is challenging due to the strong (cross)association of the components and the presence of a high boiling azeotrope. For the separation of dilute FA solutions, liquid−liquid extraction is preferred over conventional distillation because distilling large amounts of water is very energyintensive. In this study, we use 2-methyltetrahydrofuran (2-MTHF) to extract FA from the CO 2 electrolysis process, which typically contains <20 wt % of FA. Vapor−liquid equilibrium (VLE) data of the binary system 2-MTHF−FA and liquid−liquid equilibrium (LLE) data of the ternary system 2-MTHF−FA−water are obtained. Continuous extraction and distillation experiments are performed to test the extraction power and recovery of 2-MTHF from the extract. The VLE and LLE data are used to design a hybrid extraction and distillation process to produce a commercial grade product (85 wt % of FA). A detailed economic analysis of this hybrid extraction−distillation process is presented and compared with the existing FA separation methods. It is shown that 2-MTHF is a cost-effective solvent for FA extraction from dilute streams (<20 wt % FA).

Research paper thumbnail of Isobaric VaporLiquid Equilibrium Data of Binary Systems Containing 2Ethoxyethanol, 2Ethoxyethyl Acetate,AQ1: Note that 2ethoxyethylacetate was changed to 2ethoxyethyl acetate here and throughout the text. Please check if correct. and Toluene

Research paper thumbnail of Isobaric Vapour–Liquid Equilibrium Data Measurement for a Binary System of Green Solvent 2-Methyltetrahydrofuran and Acetic acid at 101.3 kPa

Arabian Journal for Science and Engineering

Research paper thumbnail of Isobaric Vapor–Liquid Equilibrium Data of Binary Systems Containing 2-Ethoxyethanol, 2-Ethoxyethyl Acetate, and Toluene

Journal of Chemical & Engineering Data

Isobaric vapor−liquid equilibrium data of the binary systems comprising 2-ethoxyethanol, 2-ethoxy... more Isobaric vapor−liquid equilibrium data of the binary systems comprising 2-ethoxyethanol, 2-ethoxyethyl acetate, and toluene were measured using an ebulliometer. The boiling temperatures of the binary mixtures are reported for six different pressures ranging from 53.3 to 101.3 kPa. The binary system 2-ethoxyethanol−toluene shows a low-boiling azeotrope around 90 mol % toluene. A nonrandom two-liquid (NRTL) model was used to fit the binary (PTx) data. The experimental data were verified using the thermodynamic consistency tests of Redlich−Kister and Wisniak. The reported data were compared with available literature data and modeling results. The studied systems are relevant for the design of azeotropic/reactive distillation columns for the esterification of 2-ethoxyethanol and acetic acid using toluene as an entrainer.

Research paper thumbnail of Measurement and correlation of vapour-liquid equilibria for cyclopentylmethylether + acetic acid at atmospheric pressure

Experimental vapour-liquid equilibrium (VLE) for binary mixtures composed of 1-(ethoxymethoxy)-pr... more Experimental vapour-liquid equilibrium (VLE) for binary mixtures composed of 1-(ethoxymethoxy)-propane with ethanol and 1-propanol at 101.33 kPa was measured. The experimental data of saturated vapour pressure for 1-(ethoxymethoxy)-propane was measured. The measurements were performed using an improved Rose equilibrium still. Two binary systems present a minimum boiling azeotropes at 101.33 kPa, in which the azeotropic temperature and composition are 351.45 K and 95.98 mole%(ethanol) and 369.44 K and 81.30 mole%(1-propanol), respectively. The VLE experimental values were correlated with the help of the NRTL, Wilson, and van Laar models for which the binary interaction parameters are reported. The results showed that the measurements have a good correlation under the NRTL and Wilson models about two binary systems, respectively. The thermodynamic consistency of the VLE experimental data was checked using the traditional area test and the direct test methods.

Research paper thumbnail of Solubility and Thermodynamics Profile of Benzethonium Chloride in Pure and Binary Solvents at Different Temperatures

Research paper thumbnail of Isobaric Vapour–Liquid Equilibrium Data Measurement for a Binary System of Green Solvent 2-Methyltetrahydrofuran and Acetic acid at 101.3 kPa

Arabian journal for science and engineering, Nov 28, 2018

Green solvents are eco-friendly solvents that can play significant role in the reduction in healt... more Green solvents are eco-friendly solvents that can play significant role in the reduction in health hazard and safety issues caused by classical solvents. The use of green solvents can be supported and enhanced by providing the data banks of these solvents, particularly vapour-liquid equilibrium (VLE) data that are required for the design of separation systems. A dynamic VLE still based on the Raal modification of Yerazunis et al. (1964) apparatus was employed in the measurement of isobaric VLE data. The VLE still was maintained at 101.3 kPa pressure. The thermodynamic consistency of the measured VLE data was confirmed by Herington's area test and Van Ness's point-to-point test. The correlation of VLE data was established by excess Gibbs energy models NRTL, Wilson and UNIQUAC and the result showed that all three models were in good agreement with the experimental data. The absolute average deviation in temperature was 0.3953 K, 0.3823 K, 0.3977 K and the absolute average deviation in vapour-phase composition was 0.0053, 0.0052, 0.0053 for NRTL, Wilson and UNIQUAC models, respectively. The relative volatility chart of 2-MeTHF/Acetic acid versus 2-MeTHF liquid mole fraction showing ± 5% deviation of experimental data from Wilson model data was also depicted. The comparison of the experimental VLE data with the data predicted by UNIFAC and modified UNIFAC Dortmund methods was made. The VLE data were generated through binary interaction parameters from Aspen Hysys for Wilson, NRTL and UNIQUAC models and compared with the experimental data. Keywords Green solvents • Vapour liquid equilibria • Dynamic VLE still • 2-Methyltetrahydrofuran • Acetic acid List of symbols A i , B i , C i Antoine equation constants g i j Energy parameter characteristic of the i-j interaction in the NRTL equation This research paper has been a part of the research project funded by Gujarat Council on Science and Technology (GUJCOST) by awarding minor research project (MRP) grant worth INR 520,000.00 to the project "Experimental Determination of Vapour-Liquid Equilibrium of Systems Comprising Green Solvents".

Research paper thumbnail of Isobaric Vapor–Liquid Equilibrium Data for Tetrahydrofuran + Acetic Acid and Tetrahydrofuran + Trichloroethylene Mixtures

Journal of Chemical & Engineering Data, Jan 27, 2023

Research paper thumbnail of Solubility and Thermodynamics Profile of Benzethonium Chloride in Pure and Binary Solvents at Different Temperatures

Research paper thumbnail of Isobaric Vapor–Liquid Equilibrium Data for Tetrahydrofuran + Acetic Acid and Tetrahydrofuran + Trichloroethylene Mixtures

Journal of Chemical & Engineering Data

Research paper thumbnail of Vapor-Liquid Equilibrium Data Prediction by Advanced Group Contribution Methods for a Binary System of Cyclopentyl Methyl Ether and Cyclopentanol at Atmospheric Pressure

The isobaric vapor-liquid equilibrium data predictions for the binary system of cyclopentyl methy... more The isobaric vapor-liquid equilibrium data predictions for the binary system of cyclopentyl methyl ether and cyclopentanol were obtained using UNIFAC and modified UNIFAC Dortmund method. Group identification was done by using artist free software with Dortmund Data Bank . The interaction parameters in the UNIFAC and modified UNIFAC Dortmund method, for the ether group (-CH3O) and alcohol (-OH), were used to predict VLE data. Thermodynamic consistency of the predicted VLE data had been checked by the Herington method. The predicted data were correlated with Van Laar, Wilson and NRTL activity coefficient models. The binary interaction parameters of models had been obtained by regression. The predicted VLE data of UNIFAC method were fitted much more accurately than that of modified UNIFAC Dortmund method by these activity coefficient models Van Laar, Wilson and NRTL.

Research paper thumbnail of Liquid–Liquid Extraction of Formic Acid with 2-Methyltetrahydrofuran: Experiments, Process Modeling, and Economics

Industrial & Engineering Chemistry Research

Formic acid (FA) is an interesting hydrogen (H 2) and carbon monoxide (CO) carrier that can be pr... more Formic acid (FA) is an interesting hydrogen (H 2) and carbon monoxide (CO) carrier that can be produced by the electrochemical reduction of carbon dioxide (CO 2) using renewable energy. The separation of FA from water is challenging due to the strong (cross)association of the components and the presence of a high boiling azeotrope. For the separation of dilute FA solutions, liquid−liquid extraction is preferred over conventional distillation because distilling large amounts of water is very energyintensive. In this study, we use 2-methyltetrahydrofuran (2-MTHF) to extract FA from the CO 2 electrolysis process, which typically contains <20 wt % of FA. Vapor−liquid equilibrium (VLE) data of the binary system 2-MTHF−FA and liquid−liquid equilibrium (LLE) data of the ternary system 2-MTHF−FA−water are obtained. Continuous extraction and distillation experiments are performed to test the extraction power and recovery of 2-MTHF from the extract. The VLE and LLE data are used to design a hybrid extraction and distillation process to produce a commercial grade product (85 wt % of FA). A detailed economic analysis of this hybrid extraction−distillation process is presented and compared with the existing FA separation methods. It is shown that 2-MTHF is a cost-effective solvent for FA extraction from dilute streams (<20 wt % FA).

Research paper thumbnail of Isobaric VaporLiquid Equilibrium Data of Binary Systems Containing 2Ethoxyethanol, 2Ethoxyethyl Acetate,AQ1: Note that 2ethoxyethylacetate was changed to 2ethoxyethyl acetate here and throughout the text. Please check if correct. and Toluene

Research paper thumbnail of Isobaric Vapour–Liquid Equilibrium Data Measurement for a Binary System of Green Solvent 2-Methyltetrahydrofuran and Acetic acid at 101.3 kPa

Arabian Journal for Science and Engineering

Research paper thumbnail of Isobaric Vapor–Liquid Equilibrium Data of Binary Systems Containing 2-Ethoxyethanol, 2-Ethoxyethyl Acetate, and Toluene

Journal of Chemical & Engineering Data

Isobaric vapor−liquid equilibrium data of the binary systems comprising 2-ethoxyethanol, 2-ethoxy... more Isobaric vapor−liquid equilibrium data of the binary systems comprising 2-ethoxyethanol, 2-ethoxyethyl acetate, and toluene were measured using an ebulliometer. The boiling temperatures of the binary mixtures are reported for six different pressures ranging from 53.3 to 101.3 kPa. The binary system 2-ethoxyethanol−toluene shows a low-boiling azeotrope around 90 mol % toluene. A nonrandom two-liquid (NRTL) model was used to fit the binary (PTx) data. The experimental data were verified using the thermodynamic consistency tests of Redlich−Kister and Wisniak. The reported data were compared with available literature data and modeling results. The studied systems are relevant for the design of azeotropic/reactive distillation columns for the esterification of 2-ethoxyethanol and acetic acid using toluene as an entrainer.