Experimental study of the kinetics of the homogenous reaction of CO2 into a novel aqueous 3-diethylamino-1,2-propanediol solution using the stopped-flow technique

Li, Jie; Liu, Helei; Liang, Zhiwu; Luo, Xiao; Liao, Huiying; Idem, Raphael; Tontiwachwuthikul, Paitoon

doi:10.1016/j.cej.2015.01.128

Cited by 29 publications

(16 citation statements)

References 44 publications

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“…The change in conductivity caused by ion formation in the reaction system is measured by a conductivity detection cell and provides an intuitive reaction rate. Pertinent details can be found elsewhere . Then, the curve of conductivity versus time is fitted in the microprocessor, and the fitting equation is given in the form:

Y = - A \cdot normalexp (|, - k_{0} \cdot t) + C

…”

Section: Methodsmentioning

confidence: 99%

“…The chemical reaction kinetics of CO 2 absorption in amine solutions is one of the most important parameters that impacts the reaction rate and its understanding is a prerequisite for the simulations and optimization of the chemical absorption process . In order to measure the kinetics data, experimental reactors should have the capabilities to keep temperature, pressure, gas–liquid surface and contact area as stable as possible.…”

Section: Introductionmentioning

confidence: 99%

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A comparative kinetics study of CO₂ absorption into aqueous DEEA/MEA and DMEA/MEA blended solutions

et al. 2017

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The kinetics of CO2 absorption into aqueous solutions of N,N‐diethylethanolamine (DEEA), and N,N‐dimethylethanolamine (DMEA), and their blends with monoethanolamine (MEA) have been studied in a stopped‐flow apparatus. The kinetics experiments were carried out at the concentrations of DEEA and DMEA varying from 0.075 to 0.175 kmol/m3, respectively, and that of MEA ranging between 0.0075 and 0.0175 kmol/m3, over the temperature range of 293–313 K. Two kinetics models are proposed to interpret the reaction in the blended amine systems and the results show that the model which incorporates the base‐catalyzed hydration mechanism and termolecular mechanism resulted in a better prediction. Furthermore, the kinetics behaviors of CO2 absorption into two blended systems are comprehensively discussed according to their molecular structures. It can be concluded that the interaction between tertiary amines and primary amines as well as the alkyl chain length of tertiary amines have a significant influence on the kinetics. © 2017 American Institute of Chemical Engineers AIChE J, 64: 1350–1358, 2018

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Y = - A \cdot normalexp (|, - k_{0} \cdot t) + C

…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A comparative kinetics study of CO₂ absorption into aqueous DEEA/MEA and DMEA/MEA blended solutions

et al. 2017

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“…The observed first‐order reaction rate constant ( k obs ) was determined by using a stopped‐flow apparatus (SF‐61DX, Hi‐Tech Scientific, Ltd. [United Kingdom]), which was the same as in our reported work . Two seal syringes were first filled with pure water (or aqueous amine solution) and aqueous CO 2 solution, respectively.…”

Section: Chemicals and Experimentsmentioning

confidence: 99%

“…According to some research, there are alternative perspectives about the effect of [OH − ] on the second‐order reaction rate constant of tertiary amine with CO 2 ( k 2_am ). Versteeg and van Swaaij measured the k 2_am of TEA, dimethylaminoethanol, N ‐dimenthylethanolamine, and TREA, and Li et al investigated the k 2_am of 3‐diethylamino‐1, 2‐propanediol (3DEA‐1,2‐PD). Both of these works ignored the effect of [OH − ] on the observed reaction rate.…”

Section: Introductionmentioning

confidence: 99%

Kinetics and new mechanism study of CO₂ absorption into water and tertiary amine solutions by stopped‐Flow technique

et al. 2018

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The objective of the present work was to find the accurate kinetic models and mechanism for CO2 absorption into tertiary amine solution, aiming at understanding the contribution of the CO2 reaction with H2O, OH−, and tertiary amines on the overall reaction rate. First, the kinetics of CO2 absorption into water instead of a buffer solution were studied using the stopped‐flow technique at 293–313 K, with initial CO2 molar concentration of 1.1–37.3 mM. The experimental first‐order reaction rate constant (k0_CO2) was determined to be about 1000 times larger than the value for CO2 absorption into buffer solution reported in the reference. The k0_CO2 was then correlated by a proposed semiempirical model and a simplified theoretical model, giving the activation energy for CO2 reacting with H2O as fitted by the simplified theoretical model in good agreement with the value of previous research. Also, the pH values and hydroxyl ion concentrations of aqueous Diethylaminoethanol (DEEA) solutions were determined at 293–313 K, with DEEA molar concentration of 0.1–0.4 M and CO2 loading of 0–0.626 mol/mol. In addition, the observed first‐order reaction rate constant ( k0_DEEA) of binary DEEA‐H2O solution with DEEA molar concentration of 0.1–0.4 M reacting with CO2 was determined at 293–313 K. It should be pointed out that the kinetic experiments of CO2 absorption into DEEA solution was done with the molar ratio of DEEA to CO2 fixed at 20. The values of k0_DEEA were then fitted and predicted by four models (i.e., termolecular model, base‐catalyzed model, the improved model, and Khalifah model). The results show the improved model and Khalifah model can predict k0_DEEA well with an average absolute relative difference (AARD) <5%. The predicted results indicate that the contribution of OH− to k0_DEEA cannot be ignored for the absorption of CO2 into tertiary amine solutions, and could be responsible for 50–70% of the total absorption reaction rate. Furthermore, the k0 value of CO2 absorption into aqueous triethanolamine and CO2‐loaded DEEA solution were further investigated and comprehensively discussed, suggesting that both pK a and the CO2 solubility affect k0, with pK a having a much more significant effect. © 2018 American Institute of Chemical Engineers AIChE J, 65: 652–661, 2019

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“…DEA-12-PD had been identified by Chowdhury et al (2013) [13] as a potential tertiary amine since the absorption rate and capacity were good. Li et al (2015) [14] studied the reaction kinetics of aqueous solutions of DEA-12-PD with CO 2 and it was observed that the reaction was faster than MDEA. They also performed pKa measurements at different temperatures.…”

Section: Introductionmentioning

confidence: 99%

Vapor Liquid Equilibrium Measurements of Two Promising Tertiary Amines for CO2 Capture

et al. 2019

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Post combustion CO 2 capture is still a rather energy intense, and therefore expensive, process. Much of the current research for reducing the process energy requirements is focused on the regeneration section. A good description of the vapor liquid equilibrium of the solvent is necessary for the accurate representation of the process. 3-(Diethylamino)-1,2-propanediol (DEA-12-PD) and 1-(2-hydroxyethyl)piperidine (12-HEPP) have been proposed as potential components in solvent blends for the membrane contactor. However, there are few available experimental data for these two tertiary amines making difficult to accurate simulate such process. In this work, we provide experimental data on the pure component saturation pressure (383 to 443 K) and on VLE of aqueous solutions of these amines (313 to 373 K) in order to fill part of the data gap. The data were used to estimate model parameters used to represent the data. The saturation pressure was modeled using the Antoine equation and the deviation is calculated lower than 2%. The NRTL model was used in this work to calculate the activity coefficients in the aqueous systems. The deviations in pressure for the aqueous systems were lower than 5% in both systems.

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Experimental study of the kinetics of the homogenous reaction of CO2 into a novel aqueous 3-diethylamino-1,2-propanediol solution using the stopped-flow technique

Cited by 29 publications

References 44 publications

A comparative kinetics study of CO₂ absorption into aqueous DEEA/MEA and DMEA/MEA blended solutions

A comparative kinetics study of CO₂ absorption into aqueous DEEA/MEA and DMEA/MEA blended solutions

Kinetics and new mechanism study of CO₂ absorption into water and tertiary amine solutions by stopped‐Flow technique

Vapor Liquid Equilibrium Measurements of Two Promising Tertiary Amines for CO2 Capture

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Experimental study of the kinetics of the homogenous reaction of CO2 into a novel aqueous 3-diethylamino-1,2-propanediol solution using the stopped-flow technique

Cited by 29 publications

References 44 publications

A comparative kinetics study of CO2 absorption into aqueous DEEA/MEA and DMEA/MEA blended solutions

A comparative kinetics study of CO2 absorption into aqueous DEEA/MEA and DMEA/MEA blended solutions

Kinetics and new mechanism study of CO2 absorption into water and tertiary amine solutions by stopped‐Flow technique

Vapor Liquid Equilibrium Measurements of Two Promising Tertiary Amines for CO2 Capture

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Product

Resources

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A comparative kinetics study of CO₂ absorption into aqueous DEEA/MEA and DMEA/MEA blended solutions

A comparative kinetics study of CO₂ absorption into aqueous DEEA/MEA and DMEA/MEA blended solutions

Kinetics and new mechanism study of CO₂ absorption into water and tertiary amine solutions by stopped‐Flow technique