Online NMR Spectroscopic Study of Species Distribution in MDEA−H2O−CO2 and MDEA−PIP−H2O−CO2

Böttinger, Wolfram; Maiwald, Michael; Hasse, Hans

doi:10.1021/ie800914m

Cited by 76 publications

(107 citation statements)

References 37 publications

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“…Single alkanolamines systems, such as primary amines, monoethanolamine (MEA); secondary amines, diethanolamine (DEA), di-isopropanolamine (DIPA); sterically hindered amines, 2-amino-2-methyl-1-propanol (AMP) and tertiary amines, N-methyldiethanolamine (MDEA) have been widely used as chemical absorbents for the removal of acid gases (Astarita et al, 1983;Böttinger et al, 2008;Chakraborty et al, 1986;Kim et al, 2008;Kohl and Nilsen, 1997;Versteeg et al, 1996) . The major problem using this technology is relatively high operating costs, mainly due to the regeneration of absorbents.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on phase change solvents in CO2 capture by NMR spectroscopy

Ciftja

Hartono

Svendsen

2013

Chemical Engineering Science

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Abstract2-(Diethylamino)ethanol (DEEA) and 3-(Methylamino) propylamine (MAPA) in combination may represent a promising absorbent system for CO 2 capture due to high CO 2 loading capacity, high equilibrium temperature sensitivity, low energy requirement for regeneration and relatively high reaction rate.Three different systems: DEEA-CO 2 -H 2 O; MAPA-CO 2 -H 2 O and DEEA-MAPA-CO 2 -H 2 O were studied quantitatively by NMR spectroscopy and the data are reported in the present work. The main products quantified for these systems are: carbonate-bicarbonate for the DEEA-CO 2 -H 2 O system; primary, secondary carbamate, dicarbamate for the MAPA-CO 2 -H 2 O system, and primary/ secondary carbamate, dicarbamate, carbonate/bicarbonate in blended DEEA-MAPA-CO 2 -H 2 O. The speciation data of the three systems were measured and reported in the present work. The blended system of 5M DEEA-2M MAPA can form two liquid phases after being loaded with CO 2 and both phases were analyzed quantitatively by NMR spectroscopy. The experimental data shows that the lower phase is rich in CO 2 and MAPA while the upper phase was lean in CO 2 and rich in DEEA. The ratio DEEA-MAPA in the lower phase increases with increasing partial pressure whereas for the upper phase the opposite is true.

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Section: Introductionmentioning

confidence: 99%

Experimental study on phase change solvents in CO2 capture by NMR spectroscopy

Ciftja

Hartono

Svendsen

2013

Chemical Engineering Science

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“…This is the most recent development of the application of NMR into quaternary systems. The initial NMR tests of quaternary systems were conducted(Böttinger et al, 2008b) for MDEA-PZ-CO 2 -H 2 O, with inaccurate results. Maneeintr et al (2010) performed an ion speciation of MEA-MeOH-CO 2 -H 2 O with basic experiments.…”

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confidence: 99%

Recent progress and new developments in post-combustion carbon-capture technology with amine based solvents

Liang

Rongwong

Liu³

et al. 2015

International Journal of Greenhouse Gas Control

423

222

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Please cite this article in press as: Liang, Z., et al., Recent progress and new developments in post-combustion carbon-capture technology with amine based solvents. Int. J. Greenhouse Gas Control (2015), http://dx.Keywords: Recent development of PCC process Design and modeling Solvent development Post Build Operations Solvent chemistry Solvent management Mass transfer with reaction a b s t r a c tCurrently, post-combustion carbon capture (PCC) is the only industrial CO 2 capture technology that is already demonstrated at full commercial scale in the TMC Mongstad in Norway (300,000 tonnes per year CO 2 captured) and BD3 SaskPower in Canada (1 million tonnes per year CO 2 captured). This paper presents a comprehensive review of the most recent information available on all aspects of the PCC processes. It provides designers and operators of amine solvent-based CO 2 capture plants with an in-depth understanding of the most up-to-date fundamental chemistry and physics of the CO 2 absorption technologies using amine-based reactive solvents. Topics covered include chemical analysis, reaction kinetics, CO 2 solubility, and innovative configurations of absorption and stripping columns as well as information on technology applications. The paper also covers in detail the post build operational issues of corrosion prevention and control, solvent management, solvent stability, solvent recycling and reclaiming, intelligent monitoring and plant control including process automation. In addition, the review discusses the most up-to-date insights related to the theoretical basis of plant operation in terms of thermodynamics, transport phenomena, chemical reaction kinetics/engineering, interfacial phenomena, and materials. The insights will assist engineers, scientists, and decision makers working in academia, industry and government, to gain a better appreciation of the post combustion carbon capture technology.

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“…This assumption is certainly good at low loading levels, while at loading >0.5 one should expect a significant degree of ion‐pair association. For more accurate modeling, one should also include the possibilities of the formation of other species, for example, oxazolidones and other byproducts, which could potentially affect the Δ H values. To ascertain the accuracy of the Δ H values for lower loadings, we computed the differential heats of absorption Δ H diff defined by the equations:

Δ H_{diff} = \frac{\partial}{\partial n_{{CO}_{2}}} [Δ H^{(1)} n_{{COO}^{-}} + Δ H^{(2)} n_{{HCO}_{3}^{-}}] for MEA, and

Δ H_{diff} = \frac{\partial}{\partial n_{{CO}_{2}}} [Δ H^{(3)} n_{{HCO}_{3}^{-}}] for MDEA,

where

n_{{CO}_{2}}

n_{{COO}^{-}}

, and

n_{{HCO}_{3}^{-}}

are the number of dissolved CO 2 molecules, carbamate ions, and bicarbonate ions, respectively, and

Δ H^{(i)}

represent the (composition‐dependent) absorption heats of the corresponding reaction [R i ] ( i = 1, 2, 3), as given in Table .…”

Section: Examples Of Molecular Modeling In Carbon Capturementioning

confidence: 99%

“…Figure plots the differential heat of absorption in the two amine solutions as a function of CO 2 loading, in which we used the experimental ion speciation values for the MEA and MDEA solutions of our interest. The MEA results are in reasonably good agreement with experimental trends, including a sharp drop at around CO 2 loading of 0.5, which signifies the onset of

{HCO}_{3}^{-}

formation.…”

Section: Examples Of Molecular Modeling In Carbon Capturementioning

confidence: 99%

“…For MEA, R 5 C 2 H 4 OH (ethanol), R 0 5 R 00 5 H; whereas for MDEA, R 5 R 00 5 C 2 H 4 OH, R 0 5 CH 3 . There is an extensive knowledge of the physical and chemical properties of CO 2 in such amines, such as solubility and vaporliquid equilibrium (VLE), [5][6][7][8][9][10][11][12][13][14] heats of absorption, [14][15][16][17][18] and activation energies. [19][20][21] Generating such knowledge database requires significant experimental measurements and/or parameter development.…”

Section: Heats Of Co 2 Absorption In Primary and Tertiary Aminesmentioning

confidence: 99%

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Atomistic modeling toward high-efficiency carbon capture: A brief survey with a few illustrative examples

Maiti

2013

Int. J. Quantum Chem.

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With the negative environmental implications of the anthropogenic emission of greenhouse gases like CO 2 having been scientifically established, emphasis is being placed on a concerted global effort to prevent such gases from reaching the atmosphere. Especially important are capture efforts at large point emission sources like fossil fuel power generation, natural gas processing, and various industrial plants. Given the importance and scale of such activities, it is a significant priority to optimize the capture process in terms of speed, energy requirements, and cost efficiency. For CO 2 capture, in particular, multiple systems are being pursued both with near-term retrofitting and medium-to long-term designs in mind, including: (1) liquid solvents like amines, carbonates, and ionic liquids (ILs); (2) microporous sorbents like zeolites, activated carbon, and metal-organic frameworks; (3) solid sorbents like metal-oxides and ionic clays; and (4) polymeric and inorganic membrane separators. Each system is unique in its molecularlevel guest-host interactions, chemistry, heats of adsorption/ desorption, and equilibrium thermodynamic and transport properties as a function of loading, temperature, and pressure. This opens up exciting opportunities for molecular modeling in the design and optimization of materials systems. Here, we offer a brief survey of molecular modeling applications in the field of carbon capture, with a few illustrative examples from our own work primarily involving amine solutions and ILs. Important molecular dynamics, Monte Carlo, and correlationsbased work in the literature relevant to CO 2 capture in other systems are also discussed.

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Online NMR Spectroscopic Study of Species Distribution in MDEA−H₂O−CO₂ and MDEA−PIP−H₂O−CO₂

Cited by 76 publications

References 37 publications

Experimental study on phase change solvents in CO2 capture by NMR spectroscopy

Experimental study on phase change solvents in CO2 capture by NMR spectroscopy

Recent progress and new developments in post-combustion carbon-capture technology with amine based solvents

Atomistic modeling toward high-efficiency carbon capture: A brief survey with a few illustrative examples

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