Precipitation regime for selected amino acid salts for CO2 capture from flue gases

Majchrowicz, M.E.; Brilman, Wim; Groeneveld, M.J.

doi:10.1016/j.egypro.2009.01.130

Cited by 88 publications

(68 citation statements)

References 9 publications

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“…In general, the conditions at which a system changes from a nonprecipitating to a precipitating system vary depending on the particular amino acid salt solution. It can be observed that the critical point at which a boundary exists between the non-precipitating and precipitating system strongly depends on the amino acid salt concentration, absorption temperature and CO 2 partial pressure [33]. The similar trend was observed for the other temperatures considered.…”

Section: Solution Concentration Effect On Co 2 Solubilitysupporting

confidence: 60%

Equilibrium solubility, density, viscosity and corrosion rate of carbon dioxide in potassium lysinate solution

Mazinani

Ramazani

Samsami

et al. 2015

Fluid Phase Equilibria

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Section: Solution Concentration Effect On Co 2 Solubilitysupporting

confidence: 60%

Equilibrium solubility, density, viscosity and corrosion rate of carbon dioxide in potassium lysinate solution

Mazinani

Ramazani

Samsami

et al. 2015

Fluid Phase Equilibria

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“…Majchrowicz et al [39] showed the relationship between precipitation behavior, CO 2 partial pressure, and salt concentrations. Of the four tested …”

Section: Introductionmentioning

confidence: 98%

Highly Selective Amino Acid Salt Solutions as Absorption Liquid for CO₂ Capture in Gas–Liquid Membrane Contactors

et al. 2010

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The strong anthropogenic increase in the emission of CO(2) and the related environmental impact force the developments towards sustainability and carbon capture and storage (CCS). In the present work, we combine the high product yields and selectivities of CO(2) absorption processes with the advantages of membrane technology in a membrane contactor for the separation of CO(2) from CH(4) using amino acid salt solutions as competitive absorption liquid to alkanol amine solutions. Amino acids, such as sarcosine, have the same functionality as alkanol amines (e.g., monoethanolamine=MEA), but in contrast, they exhibit a better oxidative stability and resistance to degradation. In addition, they can be made nonvolatile by adding a salt functionality, which significantly reduces the liquid loss due to evaporation at elevated temperatures in the desorber. Membrane contactor experiments using CO(2)/CH(4) feed mixtures to evaluate the overall process performance, including a full absorption/desorption cycle show that even without a temperature difference between absorber and desorber, a CO(2)/CH(4) selectivity of over 70 can be easily achieved with the sarcosine salt solution as absorption liquid. This selectivity reaches values of 120 at a temperature difference between absorber and desorber of 35 degrees C, compared to a value of only 60 for MEA under the same conditions. Although CO(2) permeance values are somewhat lower than the values obtained for MEA, the results clearly show the potential of amino acid salt solutions as competitive absorption liquids for the energy efficient removal of CO(2). In addition, due to the low absorption of CH(4) in sarcosine compared to MEA, the loss of CH(4) is reduced and significantly higher CH(4) product yields can be obtained.

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“…In some cases, a mixture of amino acid and KHCO 3 is formed, 50 or in other cases, only KHCO 3 is formed. 43 Although these precipitates are different from the baseline solvent, they are seen as beneficial because they help to increase the net loading (recycling less CO 2 to the absorption column), they will also induce a pH change (the combination of amino acid and HCO 3 − is more acidic than the pure bicarbonate solution), and they offer the possibility of concentrating the rich solution in CO 2 . Table 1 shows a summary of the amino acids considered most relevant for this application based on these properties.…”

Section: Lean Vapor Compression (Lvc)mentioning

confidence: 99%

“…It can contain mainly the pure amino acid, for primary amino acids, KHCO 3 , for highly hindered amino acids, or a combination of amino acid and KHCO 3 , for other amino acids. 43 This phase change can influence the equilibrium reactions in CO 2 absorption and desorption contributing to reduce the energy use of the conventional absorption− desorption capture process. The chemistry of the reaction of CO 2 with amino acid salts in the precipitation regime has been Figure 1.…”

Section: Baseline Configuration (Decab and Decab Plus)mentioning

confidence: 99%

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Analysis of Process Configurations for CO₂ Capture by Precipitating Amino Acid Solvents

Fernández

Heffernan

Ham

et al. 2014

Ind. Eng. Chem. Res.

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Precipitating amino acid solvents are an alternative to conventional amine scrubbing for CO 2 capture from flue gas. Process operation with these solvents leads to the formation of precipitates during absorption that need to be re-dissolved prior to desorption of CO 2 . The process configuration is crucial for the successful application of these solvents. Different process configurations have been analyzed in this work, including a full analysis of the baseline operating conditions (based on potassium taurate), the addition of lean vapor compression, multiple absorber feeds, and the use of different amino acids as alternative solvents to the baseline based on potassium taurate. The analysis is carried out with an equilibrium model of the process that approximates the thermodynamics of the solvents considered. The results show that the precipitating amino acid solvents can reduce the reboiler duty needed to regenerate the solvent with respect to a conventional MEA process. However, this reduction is accompanied by an expenditure in lower grade energy needed to dissolve the precipitates. To successfully implement these processes into power plants, an internal recycle of the rich stream is necessary. This configuration, known as DECAB Plus, can lower the overall energy use of the capture process, which includes the energy needed to regenerate the solvent, the energy needed to dissolve the precipitates, and the energy needed to compress the CO 2 to 110 bar. With respect to the energy efficiency, the DECAB Plus with lean vapor compression configuration is the best configuration based on potassium taurate, which reduces the reboiler duty for regeneration by 45% with respect to conventional MEA. Retrofitting this process into a coal fired power plant will result in overall energy savings of 15% with respect to the conventional MEA process, including compression of the CO 2 stream to 110 bar. Potassium alanate was found to reduce the energy use with respect to potassium taurate under similar process configurations. Therefore, the investigation of potassium alanate in a DECAB Plus configuration is highly recommended, since it can reduce the energy requirements of the best process configuration based on potassium taurate.

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Precipitation regime for selected amino acid salts for CO2 capture from flue gases

Cited by 88 publications

References 9 publications

Equilibrium solubility, density, viscosity and corrosion rate of carbon dioxide in potassium lysinate solution

Equilibrium solubility, density, viscosity and corrosion rate of carbon dioxide in potassium lysinate solution

Highly Selective Amino Acid Salt Solutions as Absorption Liquid for CO₂ Capture in Gas–Liquid Membrane Contactors

Analysis of Process Configurations for CO₂ Capture by Precipitating Amino Acid Solvents

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Precipitation regime for selected amino acid salts for CO2 capture from flue gases

Cited by 88 publications

References 9 publications

Equilibrium solubility, density, viscosity and corrosion rate of carbon dioxide in potassium lysinate solution

Equilibrium solubility, density, viscosity and corrosion rate of carbon dioxide in potassium lysinate solution

Highly Selective Amino Acid Salt Solutions as Absorption Liquid for CO2 Capture in Gas–Liquid Membrane Contactors

Analysis of Process Configurations for CO2 Capture by Precipitating Amino Acid Solvents

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Highly Selective Amino Acid Salt Solutions as Absorption Liquid for CO₂ Capture in Gas–Liquid Membrane Contactors

Analysis of Process Configurations for CO₂ Capture by Precipitating Amino Acid Solvents