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Syamalendu S Bandyopadhyay - One of the best experts on this subject based on the ideXlab platform.
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absorption of carbon dioxide into piperazine activated aqueous n Methyldiethanolamine
Chemical Engineering Journal, 2011Co-Authors: Arunkumar Samanta, Syamalendu S BandyopadhyayAbstract:Abstract This work presents a theoretical and experimental investigation on the absorption of CO 2 into piperazine (PZ) activated aqueous N-Methyldiethanolamine (MDEA) solvent. A comprehensive mathematical model which is based on Higbie's penetration theory has been developed to analyze the experimental data. The model involving coupled mass transfer–reaction kinetics–chemical equilibrium incorporates the important reversible reactions in the liquid phase. The model is validated with the experimental results of steady state absorption measurements of CO 2 in a 2.81 × 10 −2 m o.d. stainless steel wetted wall contactor. The rates of absorption of CO 2 into this solvent have been measured over the CO 2 partial pressure range of 2–14 kPa and temperature range of 298–313 K under atmospheric pressure. The absorption experiments are performed over the MDEA concentration range of 1.89–2.41 kmol m −3 along with PZ concentrations of 0.24, 0.60 and 0.95 kmol m −3 . The predicted absorption rates and enhancement factors based on the model have been found to be in good agreement with the experimental results, the average absolute deviation between the model predicted and experimental results being 6.8%. The values of the rate constants, k 23 and k 25 for the PZ-carbamate and PZ-dicarbamate formation reactions determined in this work have been found to be about 17,500 m 6 kmol −2 s −1 and 15,500 m 6 kmol −2 s −1 at 298 K, respectively. Good agreement between the model predicted and experimental results validates the mathematical model developed in this work to represent CO 2 mass transfer in PZ activated aqueous MDEA.
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solubility of co2 in water diethanolamine n Methyldiethanolamine
Fluid Phase Equilibria, 2006Co-Authors: Madhusree Kundu, Syamalendu S BandyopadhyayAbstract:Abstract This work presents new experimental results for the CO2 solubility in aqueous blends of diethanolamine (DEA) + N-methyl diethanolamine (MDEA) in the temperature range of 303–323 K and CO2 partial pressure of 1–100 kPa. The concentrations of the aqueous amine blends were 1.5 mass% DEA + 28.5 mass% MDEA, 3 mass% DEA + 27 mass% MDEA, and 4.5 mass% DEA + 25.5 mass% MDEA. A rigorous thermodynamic model is developed to correlate and predict the vapour–liquid equilibrium (VLE) of CO2 in aqueous blends of DEA + MDEA. The modified Clegg–Pitzer equations have been used to develop the model for the quaternary system (CO2 + MDEA + DEA + H2O) using the interaction parameters derived from the VLE data of the corresponding ternary systems CO2 + MDEA + H2O and CO2 + DEA + H2O. Simulated annealing, a non-traditional algorithm, has been used for parameter estimation and for the determination of equilibrium composition of various species present in the liquid phase. The model predictions have been in good agreement with the experimental data of CO2 solubility in DEA + MDEA blends of this work as well as those reported in the literature.
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physical solubility and diffusivity of n2o and co2 into aqueous solutions of 2 amino 2 methyl 1 propanol monoethanolamine and n Methyldiethanolamine monoethanolamine
Journal of Chemical & Engineering Data, 2004Co-Authors: Bishnu P Mandal, Madhusree Kundu, And Nitin U Padhiyar, Syamalendu S BandyopadhyayAbstract:In this work the physical solubility of N2O in (diethanolamine + water), (2-amino-2-methyl-1-propanol + water), (N-Methyldiethanolamine + water), (N-Methyldiethanolamine + diethanolamine + water), and (2-amino-2-methyl-1-propanol + diethanolamine + water) as well as the diffusivity of N2O in (N-Methyldiethanolamine + diethanolamine + water) and (2-amino-2-methyl-1-propanol + diethanolamine + water) have been measured at (293, 298, 303, 308, and 313) K. For the binary mixtures the amine concentration ranges studied are (2.0, 2.5, and 3.0) kmol·m-3. For the ternary mixtures the total amine strength in the solution was kept at 30 mass %, in view of the recent interest in using concentrated amine solutions in gas treating. A solubility apparatus was used to measure the solubility of N2O in amine solutions. The diffusivity was measured with a wetted wall column absorber. The uncertainty of the measurement is estimated to be ±2%. A semiempirical model of the excess Henry's constant proposed by Wang et al. (Chem...
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density and viscosity of aqueous solutions of n Methyldiethanolamine monoethanolamine n Methyldiethanolamine diethanolamine 2 amino 2 methyl 1 propanol monoethanolamine and 2 amino 2 methyl 1 propanol diethanolamine
Journal of Chemical & Engineering Data, 2003Co-Authors: Bishnu P Mandal, Madhusree Kundu, Syamalendu S BandyopadhyayAbstract:The densities and viscosities of aqueous blends of N-Methyldiethanolamine (MDEA) and 2-amino-2-methyl-1-propanol with monoethanolamine (MEA) and diethanolamine (DEA) have been measured at (25, 30, 35, 40, 45, and 50) °C. The total amine strength in the solution was kept at 30 mass % in view of recent interest in using concentrated amine solutions in gas treating. Correlations for the density and viscosity of the ternary mixtures are presented.
Jose M Navaza - One of the best experts on this subject based on the ideXlab platform.
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density speed of sound isentropic compressibility and excess volume of monoethanolamine 2 amino 2 methyl 1 propanol monoethanolamine triethanolamine and monoethanolamine n Methyldiethanolamine at temperatures from 293 15 to 323 15 k
Journal of Chemical & Engineering Data, 2010Co-Authors: Estrella Alvarez, Diego Gomezdiaz, Fernando Cerdeira, Jose M NavazaAbstract:Density and speed of sound of (monoethanolamine + 2-amino-2-methyl-1-propanol), (monoethanolamine + triethanolamine), and (monoethanolamine + N-Methyldiethanolamine) were measured over the entire composition range and at temperatures from (293.15 to 323.15) K. The experimental values were used to calculate the isentropic compressibilities, excess molar volumes, and isentropic compressibility deviations. Redlich−Kister-type polynomial equations were used to fit the excess molar volumes and isentropic compressibility deviations.
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removal process of co2 using mdea aqueous solutions in a bubble column reactor
Chemical Engineering Journal, 2009Co-Authors: Jose M Navaza, Diego Gomezdiaz, Ma Dolores La RubiaAbstract:Abstract Present work analyses the behaviour and mass transfer of N-Methyldiethanolamine (MDEA) in the removal process of carbon dioxide using a bubble column reactor (BCR) as gas–liquid contactor. The use of this type of equipment requires the interfacial area determination for the following mass transfer coefficient calculation based on absorption kinetics. In this work, a photographic method based on the bubble diameter determination, has been employed. The effect of contactor, operation conditions, liquid-phase nature and chemical reaction upon the mass transfer coefficient and interfacial areas have been analysed.
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densities and viscosities of aqueous ternary mixtures of 2 methylamino ethanol and 2 ethylamino ethanol with diethanolamine triethanolamine n Methyldiethanolamine or 2 amino 1 methyl 1 propanol from 298 15 to 323 15 k
Journal of Chemical & Engineering Data, 2006Co-Authors: Estrella Alvarez, Diego Gomezdiaz, And Dolores M La Rubia, Jose M NavazaAbstract:Densities and kinematic viscosities of aqueous ternary solutions of 2-(methylamino)ethanol and 2-(ethylamino)ethanol with diethanolamine, triethanolamine, N-Methyldiethanolamine, or 2-amino-1-methyl-1-propanol were measured at temperatures from (298.15 to 323.15) K. The total amine concentration was held constant at 50 mass %, and the (MAE or EAE)/(DEA, TEA, MDEA, or AMP) mass % ratio was varied from 0/50 to 50/0, in 10 mass % steps. The experimental values were correlated with temperature and mole fraction.
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surface tension of binary mixtures of water n Methyldiethanolamine and ternary mixtures of this amine and water with monoethanolamine diethanolamine and 2 amino 2 methyl 1 propanol from 25 to 50 c
Journal of Chemical & Engineering Data, 1998Co-Authors: Estrella Alvarez, Raquel Rendo, B Sanjurjo, M Sanchezvilas, Jose M NavazaAbstract:The surface tension of aqueous solutions of N-Methyldiethanolamine and diethanolamine + N-Methyldiethanolamine, monoethanolamine + N-Methyldiethanolamine and 2-amino-2-methyl-1-propanol + N-Methyldiethanolamine was measured at temperatures from 25 °C to 50 °C. For binary mixtures the concentration range was 0−50 mass % N-Methyldiethanolamine, and for the tertiary mixtures the concentration range for each amine was 0−50 mass %. The experimental values were correlated with temperature and mole fraction. The maximum deviation in both cases was always less than 0.5%.
Bishnupada Mandal - One of the best experts on this subject based on the ideXlab platform.
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kinetics of absorption of carbon dioxide into aqueous blends of 2 1 piperazinyl ethylamine and n Methyldiethanolamine
Chemical Engineering Science, 2009Co-Authors: Subham Paul, Aloke Kumar Ghoshal, Bishnupada MandalAbstract:Abstract The kinetics absorption of CO 2 into aqueous blends of 2-(1-piperazinyl)-ethylamine (PZEA) and N -Methyldiethanolamine (MDEA) were studied at 303, 313, and 323 K using a wetted wall column absorber. The PZEA concentrations in the blends with MDEA varied from 0 to 0.3 kmol m - 3 to see the effect of PZEA as an activator in the blends with two different total amine concentrations (1.0 and 2.0 kmol m - 3 ). Based on the pseudo-first-order condition for the CO 2 absorption, the overall second-order reaction rate constants were determined from the kinetic measurements. The kinetic rate parameters were calculated and presented at each experimental condition.
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density and viscosity of aqueous solutions of 2 piperidineethanol piperazine from 288 to 333 k and surface tension of aqueous solutions of n Methyldiethanolamine piperazine 2 amino 2 methyl 1 propanol piperazine and 2 piperidineethanol piperazine fro
Journal of Chemical & Engineering Data, 2006Co-Authors: Subham Paul, Bishnupada MandalAbstract:The densities and viscosities of aqueous blends of 2-piperidineethanol (2-PE) with piperazine (PZ) at (288, 293, 298, 303, 308, 313, 318, 323, 328, and 333) K as well as the surface tension of aqueous blends of PZ with N-Methyldiethanolamine, 2-amino-2-methyl-1-propanol, and 2-PE at (293, 298, 303, 308, 313, 318, and 323) K have been measured. The total amine mass fraction in all solutions was kept within 30 % in view of recent interest in using concentrated amine solutions in gas treating. Correlations for the density and viscosity of the ternary mixtures are presented as a function of temperature and amine concentration.
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density and viscosity of aqueous solutions of n Methyldiethanolamine piperazine and 2 amino 2 methyl 1 propanol piperazine from 288 to 333 k
Journal of Chemical & Engineering Data, 2006Co-Authors: Subham Paul, Bishnupada MandalAbstract:The densities and viscosities of aqueous blends of piperazine (PZ) with N-Methyldiethanolamine (MDEA) and 2-amino-2-methyl-1-propanol (AMP) have been measured at (288, 293, 298, 303, 308, 313, 318, 323, 328, and 333) K. The total amine mass fraction in all solutions was kept at 30 % in view of recent interest in using concentrated amine solutions in gas treating. Correlations for the density and viscosity of the ternary mixtures are presented as a function of temperature and amine concentration.
Estrella Alvarez - One of the best experts on this subject based on the ideXlab platform.
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co2 absorption into n Methyldiethanolamine aqueous organic solvents
Chemical Engineering Journal, 2016Co-Authors: F J Tamajon, Fernando Cerdeira, Estrella Alvarez, Diego GomezdiazAbstract:Abstract The present work studied the CO2 absorption into N-Methyldiethanolamine hybrid (chemical and physical) solutions, using pure water, pure methanol and water + methanol mixtures as solvents. The variables considered were amine concentration (0%, 5%, 15% and 30% in mass), methanol ratio in the solvent according to molar fractions (0, 0.4, 0.7 and 1) and temperature (283.15, 293.15, 303.15 and 313.15 K). Experiments were carried out at atmospheric pressure in a batch-operated stirred reactor, and the direct measurement of the CO2 absorbed was performed in a calibrated bubble meter. The absorbed CO2 per unit area, Q (kmol m−2), and CO2 flow density, NA (kmol m−2 s−1), were determined for each experimental series. The ratio between the CO2 flow density in MDEA aqueous solutions, Nw, and the value in aqueous organic solutions, Nw+m, was also analyzed. Individual mass transfer coefficients in the liquid phase, kL (m s−1), were determined from physical absorption experiments, as well as data on the CO2 solubility. Both CO2 diffusivity, D CO 2 (m2 s−1), and N-Methyldiethanolamine, D0MDEA (m2 s−1), diffusivity values in the liquid phase were also provided. The CO2 absorption experiments were significantly influenced by the effect of temperature, amine concentration and water/methanol ratio. The performance of CO2 absorption into aqueous MDEA solutions was compared to that into hybrid MDEA solutions. It was concluded that MDEA aqueous solutions demonstrated lower performance than amine solutions using pure methanol or water–methanol mixtures as solvents, even at high temperatures and amine concentrations. Results showed that at high temperatures, amine concentration and chemical absorption had no relevant influence on the process. The methanol effect was noticed to improve the diffusivity and solubility in the process, by means of physical absorption.
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density speed of sound isentropic compressibility and excess volume of monoethanolamine 2 amino 2 methyl 1 propanol monoethanolamine triethanolamine and monoethanolamine n Methyldiethanolamine at temperatures from 293 15 to 323 15 k
Journal of Chemical & Engineering Data, 2010Co-Authors: Estrella Alvarez, Diego Gomezdiaz, Fernando Cerdeira, Jose M NavazaAbstract:Density and speed of sound of (monoethanolamine + 2-amino-2-methyl-1-propanol), (monoethanolamine + triethanolamine), and (monoethanolamine + N-Methyldiethanolamine) were measured over the entire composition range and at temperatures from (293.15 to 323.15) K. The experimental values were used to calculate the isentropic compressibilities, excess molar volumes, and isentropic compressibility deviations. Redlich−Kister-type polynomial equations were used to fit the excess molar volumes and isentropic compressibility deviations.
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densities and viscosities of aqueous ternary mixtures of 2 methylamino ethanol and 2 ethylamino ethanol with diethanolamine triethanolamine n Methyldiethanolamine or 2 amino 1 methyl 1 propanol from 298 15 to 323 15 k
Journal of Chemical & Engineering Data, 2006Co-Authors: Estrella Alvarez, Diego Gomezdiaz, And Dolores M La Rubia, Jose M NavazaAbstract:Densities and kinematic viscosities of aqueous ternary solutions of 2-(methylamino)ethanol and 2-(ethylamino)ethanol with diethanolamine, triethanolamine, N-Methyldiethanolamine, or 2-amino-1-methyl-1-propanol were measured at temperatures from (298.15 to 323.15) K. The total amine concentration was held constant at 50 mass %, and the (MAE or EAE)/(DEA, TEA, MDEA, or AMP) mass % ratio was varied from 0/50 to 50/0, in 10 mass % steps. The experimental values were correlated with temperature and mole fraction.
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surface tension of binary mixtures of water n Methyldiethanolamine and ternary mixtures of this amine and water with monoethanolamine diethanolamine and 2 amino 2 methyl 1 propanol from 25 to 50 c
Journal of Chemical & Engineering Data, 1998Co-Authors: Estrella Alvarez, Raquel Rendo, B Sanjurjo, M Sanchezvilas, Jose M NavazaAbstract:The surface tension of aqueous solutions of N-Methyldiethanolamine and diethanolamine + N-Methyldiethanolamine, monoethanolamine + N-Methyldiethanolamine and 2-amino-2-methyl-1-propanol + N-Methyldiethanolamine was measured at temperatures from 25 °C to 50 °C. For binary mixtures the concentration range was 0−50 mass % N-Methyldiethanolamine, and for the tertiary mixtures the concentration range for each amine was 0−50 mass %. The experimental values were correlated with temperature and mole fraction. The maximum deviation in both cases was always less than 0.5%.
Alan E Mather - One of the best experts on this subject based on the ideXlab platform.
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viscosities and excess properties of aqueous solutions of ethanolamines from 25 to 80 c
Journal of Solution Chemistry, 2002Co-Authors: Yadollah Maham, C N Liew, Alan E MatherAbstract:Viscosities of aqueous solutions of monoethanolamine and triethanolamine have been measured from 25 to 80°C over the entire range of concentrations. The excess Gibbs energies for viscous flow have been calculated for aqueous solutions of monoethanolamine, triethanolamine, and also for diethanolamine and Methyldiethanolamine from our earlier work [J. Chem. Eng. Data39, 290 (1994)]. The entropy of viscous flow was obtained by using the temperature dependence of the excess Gibbs energy for viscous flow. The structural effects on the viscosity, excess Gibbs energy, and entropy for viscous flow are discussed.
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enthalpy of solution of carbon dioxide in water monoethanolamine or diethanolamine orn Methyldiethanolamine and water monoethanolamine n Methyldiethanolamine att 298 15 k
The Journal of Chemical Thermodynamics, 2000Co-Authors: James K. Carson, Kenneth N. Marsh, Alan E MatherAbstract:Abstract Measurements of the enthalpy of solution for carbon dioxide in (water + monoethanolamine, or diethanolamine, or N -Methyldiethanolamine) and in (water + monoethanolamine + N -Methyldiethanolamine) at T = 298.15 K have been made by isothermal displacement calorimetry. The estimated uncertainty is between ± 1 and 2 per cent. The results are compared with previous measurements made by isothermal flow calorimetry, isoperibol calorimetry and values derived from solubility measurements.
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densities and viscosities for binary mixtures of n Methyldiethanolamine triethylene glycol monomethyl ether from 25 c to 70 c and n Methyldiethanolamine ethanol mixtures at 40 c
Journal of Chemical & Engineering Data, 2000Co-Authors: Amr Henni, Yadollah Maham, Paitoon Tontiwachwuthikul, And Amit Chakma, Alan E MatherAbstract:This paper reports the measured values of the density and viscosity of binary mixtures of N-Methyldiethanolamine (MDEA) and triethylene glycol monomethyl ether (TEGMME) at five temperatures in the range 25 °C to 70 °C over the whole concentration range. We also report the density and viscosity of the binary mixture MDEA + ethanol at 40 °C. The results are compared with data for aqueous mixtures and other alkanolamines when these are available. The derived excess molar volumes and viscosity deviations were correlated as a function of composition. The Grunberg−Nissan interaction energy constants are also reported.
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vapor liquid equilibria in the system ethanethiol Methyldiethanolamine water in the presence of acid gases
Journal of Chemical & Engineering Data, 1999Co-Authors: Fangyuan Jou, Alan E Mather, Kurt A G SchmidtAbstract:This investigation was carried out to determine the solubility of ethanethiol in a Methyldiethanolamine (MDEA) solution. Measurements were made in the absence of acid gases, H2S and CO2, with individual acid gases present, and with mixtures of acid gases present. Experiments with an aqueous solution of 50 mass % MDEA were carried out at 40 and 70 °C. The total pressure for most of the experiments was 6890 kPa, which was maintained by methane. Partial pressures of ethanethiol ranged from 0.2 to 15 kPa.
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molar heat capacities of alkanolamines from 299 1 to 397 8 k group additivity and molecular connectivity analyses
Journal of the Chemical Society Faraday Transactions, 1997Co-Authors: Yadollah Maham, Alan E Mather, Loren G Hepler, Andrew W Hakin, Robert A MarriottAbstract:The molar heat capacities of 14 alkanolamine compounds have been measured at five separate temperatures in the range 299.1 to 397.8 K. These compounds were monoethanolamine (MEA), monomethylethanolamine (MMEA), dimethylethanolamine (DMEA), monoethylethanolamine (MEEA), diethylethanolamine (DEEA), n-propylethanolamine (n-PEA), diisopropylethanolamine (di-PEA), diethanolamine (DEA), Methyldiethanolamine (MDEA), ethyldiethanolamine (EDEA), n-butyldiethanolamine(n-BDEA), tert-butyldiethanolamine (tert-BDEA), triethanolamine (TEA) and 2-amino-2-methylpropan-1-ol (AMP). Molar heat capacities of these compounds show a structural dependence, where the molar heat capacity of one molecule may be considered as the sum of various group contributions. Hence, the reported molar heat capacity data have been used as input to a group additivity analysis that yields estimates of CH 2 , OH, NH and N group contributions to molar heat capacities at each investigated temperature. The additivity principle has been explored in more detail by using molecular connectivity indexes to obtain a simple five-term equation that models the molar heat capacities of the investigated alkanolamines over the entire experimental temperature range.