Enthalpy of solution of carbon dioxide in (water + monoethanolamine, or diethanolamine, orN-methyldiethanolamine) and (water + monoethanolamine +N-methyldiethanolamine) atT= 298.15 K

Carson, James K.; Marsh, Kenneth N.; Mather, Alan E.

doi:10.1006/jcht.2000.0680

Cited by 121 publications

(99 citation statements)

References 12 publications

(15 reference statements)

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“…As can be seen from the figure, all the samples are easily regenerated by simply changing the feed gas from CO 2 to He at 298 K (above 95 % of all the adsorbed CO 2 was desorbed after 30 min). The calorimetric measurements showed that the specific heat of adsorption of CO 2 over the studied samples lies in the range of 48-68 kJ kg -1 , which is very small compared to the heat of absorption of CO 2 in MEA solutions (1864 kJ kg -1 ) [51], commonly used in the industrial amine scrubbing process to separate CO 2 from gaseous streams. One of the major drawbacks of the application of amine scrubbing to post-combustion capture is the energy penalty associated to the solvent regeneration (the steam cost accounts for 50% of the running cost of the plant) [52].…”

Section: Chemical and Textural Propertiesmentioning

confidence: 87%

Influence of oxidation upon the CO2 capture performance of a phenolic-resin-derived carbon

Plaza¹,

Thurecht²,

Pevida³

et al. 2013

Fuel Processing Technology

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The effect of oxidation upon the CO 2 capture performance has been studied taking a phenolic resin carbon as the base material. Oxygen surface groups were introduced through liquid and gas phase oxidation treatments, using ammonium persulfate, nitric acid and air, respectively.The surface chemistry of the final carbon is strongly affected by the type of oxidation treatment: liquid phase oxidation introduces a greater amount of oxygen, mostly as carboxylic groups; these are absent in the gas phase oxidised sample that contains mainly ether and carbonyl functionalities. The porous texture of the samples is also affected by the oxidation treatment: through liquid phase oxidation the pore volume is somewhat reduced, while this is slightly developed by air treatment at 693 K. Despite the reduction in the porous volume and the acidic surface, liquid-phase oxidised samples present greater CO 2 adsorption capacity than the starting carbon due to Lewis acid-base interactions with the CO 2 molecule.Moreover: oxidised samples are easily regenerated, and observed heats of adsorption are † Corresponding Author: Tel : +34 985 119090; E-mail address: frubiera@incar.csic.es. (F. Rubiera) 2 typical from physisorption processes, which will facilitate the adsorbent regeneration in cyclic adsorption processes. Oxidation is therefore proposed as a plausible modification technique for developing easy-to-regenerate carbon adsorbents with enhanced CO 2 capture performance.

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Section: Chemical and Textural Propertiesmentioning

confidence: 87%

Influence of oxidation upon the CO2 capture performance of a phenolic-resin-derived carbon

Plaza¹,

Thurecht²,

Pevida³

et al. 2013

Fuel Processing Technology

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“…Most of the enthalpy measurements were made by using isothermal calorimeters. Carson et al [7] used an isothermal displacement calorimeter (Figure 2.3 [7]) for measuring the enthalpies of MEA, MDEA, DEA and their mixtures at a pressure of 265 kPa and a temperature of 298.15 K. These displacement calorimeters were basically used for measurements involving binary liquid mixtures where the solute is injected into the calorimeter from a burette. This method was used to measure enthalpies at low concentrations of CO 2 in alkanolamines (enthalpy at infinite dilution).…”

Section: Isothermal Displacement Calorimetermentioning

confidence: 99%

“…Corresponding data in aqueous solutions of MDEA and DEA are available over a range of tempera 6 o p MDEA-Sulfolane mixture which were measured over a certain range of pressures (156-121 kPa) and temperatures (15-149 ºC). Most of the enthalpy data for MEA, MDEA, EA and their mixtures were measured by Carson et al [7], Oscarson et al [49], erkely et al [48] and Mathanot et al [46]. Christensen et al [9] measured the enthalpy r DGA solutions.…”

Section: Isothermal Flow Calorimetermentioning

confidence: 99%

“…Moreover the variation in enthalpy was found to be increased with increase in temperature and concentration. Enthalpy data at infinite dilution of CO 2 were measured by Carson et al [7], Mathonat et al [46], Merkley et al [48] and Schafer et al [56]. …”

Section: Enthalpy Data At Infinite Dilution Of Comentioning

confidence: 99%

“…30 Wt% This w ork 30 Wt% Mathonat et al [46] 20 Wt% Merkely et al [48] 20 Wt% This w ork 40 Wt% Merkely et al [48] 60 Wt% Merkely et al [48] 50 Wt% This w ork 10 Wt% Carson et al [7] 20 Wt% Carson et al [7] 30 Wt% Carson et al [7] …”

Section: ∆H (Kj / M Ol Co2)mentioning

confidence: 99%

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Heat of Dissolution Measurements for CO2 in Mixed Alkanolamine Solvents

Kabadi¹

2007

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The main objective of this research was to measure heat of dissolution of CO 2 in carefully mixed alkanolamine solvent systems, and provide such directly measured data that might be used for efficient design of CO 2 capture process, and for better understanding of the thermodynamics of CO 2 -Alkanolamine systems. An experimental set-up has been designed using the Isothermal Micro Calorimeter for measuring the solubilities and enthalpies of CO 2 in mixed solvents made of MEA, MDEA, PZ, KF and water. All the measurements were done at temperatures 15, 40, and 75 ºC by maintaining a constant pressure of 100 psig. A detailed study has been done on the variation of solubilities and enthalpies over a wide range of temperatures, pressures and concentrations, by extracting the information from the literature. 3 EXECUTIVE SUMMARYThe main objective of this project was to measure heat of dissolution of CO 2 in carefully selected mixed alkanolamine solvent systems, and provide such directly measured data that might be used for efficient design of CO 2 capture processes, or for better understanding of thermodynamics of CO 2 -alkanolamine systems. Carbon dioxide is one of the major greenhouse gases, and the need for stabilization of its composition in earth's atmosphere is vital for the future of mankind. Although technologies are available for capture and storage of CO 2 , these technologies are far too expensive for economical commercialization. Reduction of cost would require research for refinement of the technology. For more economical CO 2 capture and regeneration, there is a need for development of more efficient solvent systems. In this project we have extended the thermodynamic database by measuring heat of solution data of CO 2 in mixed solvents made of MEA (monoethanolamine), MDEA (methyldiethanolamine), piperazine, and water. Mixed solvents of different compositions were selected and in each case data were measured at temperatures 15, 40 and 80C and a fixed pressure of 100 psig. Fairly good comparisons were observed for solubility and enthalpy data when compared with the available literature data.An apparatus was designed and built that uses an isothermal micro-calorimeter (made by Calorimetry Sciences Corp) to measure the heat of solution, and allows measurement of heat of solution as a function of carbon dioxide concentration. The solubility of CO 2 in the solvent can be estimated from the saturation point on the heat curve. In addition to aqueous MEA, MDEA, piperazine and their mixtures, data were also measured using aqueous MDEA solvent with potassium fluoride (KF.2H 2 O) as an additive. The goal of these measurements was to investigate whether potassium fluoride enhances the solvent properties of MDEA. Results did not show any obvious improvements. The data showed no appreciable improvements in solvent properties as a result of adding potassium fluoride.A thorough literature search was conducted for solubilites and enthalpies. More data are available for solubilites than for enthalpies. All the enthalp...

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The analysis of solubility, absorption kinetics of CO₂ absorption into aqueous 1‐diethylamino‐2‐propanol solution

et al. 2017

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In this present work, the CO2 absorption performance of aqueous 1‐diethylamino‐2‐propanol (1DEA2P) solution was studied with respect to CO2 equilibrium solubility, absorption kinetics, and absorption heat. The equilibrium solubility of CO2 in 2M 1DEA2P solution was measured over the temperature range from 298 to 333 K and CO2 partial pressure range from 8 to101 kPa. The absorption kinetics data were developed and analyzed using the base‐catalyzed hydration mechanism and artificial neural network models (radial basis function neural network [RBFNN] and back‐propagation neural network [BPNN] models) with an acceptable absolute average deviation of 10% for base‐catalyzed hydration mechanism, 2.6% for RBFNN model and 1.77% for BPNN model, respectively. The CO2 absorption heat of 1DEA2P was estimated to be −43.6 kJ/mol. In addition, the ions (1DEA2P, 1DEA2PH+, , CO32−) speciation plots of the 1DEA2P‐CO2‐H2O system were developed to further understand the reaction process of 1DEA2P with CO2. Based on a comparison with conventional amines (e.g., MEA, DEA, MDEA) and alternative amines (i.e., 1DMA2P and 4‐(diethylamino)−2‐butanol [DEAB]), 1DEA2P exhibited good performance with respect to CO2 equilibrium solubility, reaction kinetics, and CO2 absorption heat. Meanwhile, the overall evaluation of 1DEA2P for application in CCS in terms of absorption and desorption is presented, giving helpful information for the screening of these novel amines. © 2017 American Institute of Chemical Engineers AIChE J, 63: 2694–2704, 2017

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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

Cited by 121 publications

References 12 publications

Influence of oxidation upon the CO2 capture performance of a phenolic-resin-derived carbon

Influence of oxidation upon the CO2 capture performance of a phenolic-resin-derived carbon

Heat of Dissolution Measurements for CO2 in Mixed Alkanolamine Solvents

The analysis of solubility, absorption kinetics of CO₂ absorption into aqueous 1‐diethylamino‐2‐propanol solution

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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

Cited by 121 publications

References 12 publications

Influence of oxidation upon the CO2 capture performance of a phenolic-resin-derived carbon

Influence of oxidation upon the CO2 capture performance of a phenolic-resin-derived carbon

Heat of Dissolution Measurements for CO2 in Mixed Alkanolamine Solvents

The analysis of solubility, absorption kinetics of CO2 absorption into aqueous 1‐diethylamino‐2‐propanol solution

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Product

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The analysis of solubility, absorption kinetics of CO₂ absorption into aqueous 1‐diethylamino‐2‐propanol solution