Kinetic study of the thermal decomposition of monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA) and methyldiethanolamine (MDEA)

Ávila, Simone Garcia de; Logli, Marco A.; Matos, Jivaldo do Rosário

doi:10.1016/j.ijggc.2015.10.001

Cited by 52 publications

(27 citation statements)

References 8 publications

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“…The tertiary N-methyldiethanolamine (MDEA) has great potential among the amines used as solvents in CO 2 reactive absorption processes thanks to its high absorption In addition, MDEA is less corrosive and less volatile and has decomposition products with lower toxicity, especially in comparison to primary and secondary amines such as monoethanolamine (MEA) and diethanolamine (DEA) (Bougie and Iliuta 2012;Quang et al 2013;Afkhamipour and Mofarahi 2014;de Ávila et al 2015;El Hadri 2017). Low regeneration energy is the essential factor for the implementation of carbon capture processes, as 70-80% of the energy of the absorption-desorption process can be consumed by the regeneration process (Nwaoha et al 2016).…”

Section: Theoreticalmentioning

confidence: 99%

Enzyme-enhanced CO2 absorption process in rotating packed bed

et al. 2018

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Carbon dioxide is considered the most important contributor to the global warming effect. To reduce greenhouse gas emissions, CO 2 should be separated from the exhaust gas stream in a selective way. The most often applied technology to capture CO 2 from exhaust gases is the reactive absorption in aqueous amine solutions, which is currently widely used in different industrial applications. The efficiency of this technology could be improved by applying high-gravity technologies that intensify mass transfer and can enable substantial equipment size reduction compared to the traditionally used packed columns. Rotating packed bed (RPB) technology meets these requirements very well. Applying innovative materials such as the highly efficient enzyme carbonic anhydrase can further improve the efficiency of the CO 2 absorption process. This combination of intensified technology together with new solvents is expected to improve the total efficiency of CO 2 absorption. In this study, we present our experimental results of CO 2 absorption using 30 wt% N-methyldiethanolamine (MDEA) solution in water in an RPB unit with and without carbonic anhydrase for different gas and liquid flow rates. The results indicate significantly improved performance of CO 2 absorption, up to 18 times compared to the solvent without enzyme. Keywords Rotating packed bed • RPB • CO 2 absorption • Carbonic anhydrase • MDEA Symbols a Specific surface area of the packing m 2 m −3 A Cross-section area m 2 c %MDEA MDEA concentration in water solution % F factor F factor Pa 0.5 M MDEA Molar mass of MDEA kg kmol −1 n CO 2 ,abs Molar flow rate of total absorbed CO 2 mol h −1 n CO 2 ,abs,packing Molar flow rate of absorbed CO 2 inside the packing mol h −1ṅ CO 2 ,abs,case Molar flow rate of absorbed CO 2 in the casing mol h −1 n G in CO 2 Molar flow rate of CO 2 in gas inlet mol h −1 n G inside CO 2 Molar flow rate of CO 2 in the casing mol h −1 n G out CO 2 Molar flow rate of CO 2 in gas outlet mol h −1 p Pressure Pa R Gas constant J mol −1 K −1 T Temperature K u L Specific liquid load m 3 m −2 h −1 v in CO 2 Volume fraction of CO 2 in gas inlet m 3 m −3 v inside CO 2 Volume fraction of CO 2 in gas m 3 m −3 v out CO 2 Volume fraction of CO 2 in gas outlet m 3 m −3 V G Volumetric gas flow m 3 h −1 V L Volumetric liquid flow m 3 h −1 Y CO 2 CO 2 loading mol mol −1 Greek letters Porosity of the packing m 3 m −3 G Density of gas kg m −3 MDEA Density of MDEA kg m −3

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Section: Theoreticalmentioning

confidence: 99%

Enzyme-enhanced CO2 absorption process in rotating packed bed

et al. 2018

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“…Monoethanolamine (MEA) is universally used as an absorbent by over a thousand commercial plants, because it has a high absorption rate, high alkalinity, regenerability, and low price, but the it also has low loading, deterioration, high corrosively, and a high regenerated energy [3]. In order to improve the absorption and stripping efficiency, it is imperative to find new, more efficient solvents, such as 2 of 20 methyldiethanolamine (MDEA), diethanolamine (DEA), diethylenetriamie (DETA), piperazine (PZ), ionic liquids, and blended amines [5][6][7][8][9][10][11]. Compared with MEA, it has been found that regeneration energy can be largely reduced for both single amines and blended amines [9,12].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the studies using amino acid salt as an absorbent have been noted by scholars. In order to improve on the drawback of alkanolamines, including their oxidative degredation and high vapor pressure resulting in solvent loss and degradation product handling, many alternative solvents have been tested [3,[6][7][8][9][10][11][18][19][20][21][22], in which amino acid salts are found to be more attractive solvents. This is because amino acid salt solutions have a better resistance to degradation, have a negligible volatility, and no environmental issue [23].…”

Section: Introductionmentioning

confidence: 99%

Optimization in the Absorption and Desorption of CO2 Using Sodium Glycinate Solution

Chen

Lin

2018

Applied Sciences

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This study used sodium glycinate as an absorbent to absorb CO2 in the bubble column scrubber under constant pH and temperature environments to obtain the operating range, CO2 loading, and mass transfer coefficient. For efficient experimentation, the Taguchi method is used for the experimental design. The process parameters are the pH, gas flow rate (Qg), liquid temperature (T), and absorbent concentration (CL). The effects of the parameters on the absorption efficiency, absorption rate, overall mass transfer coefficient, gas–liquid molar flow rate ratio, CO2 loading, and absorption factor are to be explored. The optimum operating conditions and the order of parameter importance are obtained using the signal/noise (S/N) ratio analysis, and the optimum operating conditions are further verified. The verification of the optimum values was also carried out. The order of parameter importance is pH > CL > Qg > T. Evidence in the 13CNMR (Carbon 13 Nuclear Magnetic Resonance) spectra shows that the pH value has an effect on the solution composition, which affects both the absorption efficiency and mass transfer coefficient. There are 18 experiments for regeneration, where the operating temperature is 100–120 °C. The heat of regeneration was measured according to the thermodynamic data. The CO2 loading, the overall mass transfer, and the heats of regeneration correlation are also discussed in this work. Finally, an operating policy for the CO2 absorption process was confirmed.

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“…Regarding TEA thermal decomposition during pyrolysis [14,15], the aspect ratio is expected to play a role [16]: in fact, when in the form of films, TEA is likely to evaporate before reaching its decomposition temperature (250-300°C) thanks to the high surface to volume ratio. When it is placed inside a crucible, evaporation is significantly slowed down so it can be heated to higher temperature (above 300°C) where it decomposes releasing acetaldehyde (CH 3 CHO), CO 2 , ammonia (NH 3 ) and ethylene oxide (CH 2 OCH 2 ) [14,16]. On the other hand, metalorganic complexes of TEA are expected to decompose following several decomposition steps [17] that start with the loss of small TEA units and end with the metal salt decomposition.…”

Section: Introductionmentioning

confidence: 99%

Effect of triethanolamine on the pyrolysis of metal-propionate-based solutions

Rasi

Ricart

Obradors

et al. 2019

Journal of Analytical and Applied Pyrolysis

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The effect of triethanolamine (TEA) on single-salt propionate-based solutions used to prepare YBa 2 Cu 3 O 7-∂ (YBCO) has been studied through thermal analysis, for film and powder samples. Decomposition has been followed by thermogravimetry (TG) coupled to differential scanning calorimetry (DSC) and evolved gas analysis (EGA-MS and TG-FTIR), while chemical characterization has been carried out by FTIR, XRD and EA. The addition of TEA has little effect on the decomposition of Ba-Prop-Ac. Conversely, the thermal behavior of CuProp 2 and YProp 3 film with TEA becomes more gradual and less affected by a change of atmosphere than the TEA-free case. This is explained by the fact that the decomposition mechanism is driven by the formation of an ester between the propionate groups and the TEA's OH groups, which is promoted by inert atmospheres and temperatures above 200°C. Just as the single salt precursors, the Ba and Y films show residual organic material at 500°C in thick films decomposed in O 2 .

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Kinetic study of the thermal decomposition of monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA) and methyldiethanolamine (MDEA)

Cited by 52 publications

References 8 publications

Enzyme-enhanced CO2 absorption process in rotating packed bed

Enzyme-enhanced CO2 absorption process in rotating packed bed

Optimization in the Absorption and Desorption of CO2 Using Sodium Glycinate Solution

Effect of triethanolamine on the pyrolysis of metal-propionate-based solutions

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