A study of structure–activity relationships of commercial tertiary amines for post-combustion CO2 capture

Xiao, Min; Liu, Helei; Idem, Raphael; Tontiwachwuthikul, Paitoon; Liang, Zhiwu

doi:10.1016/j.apenergy.2016.10.006

Cited by 156 publications

(114 citation statements)

References 45 publications

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“…Of the 24 enhancement factor models tested only six models were found to satisfactorily predict the experimental CO2 fluxes. These were the models based on the simple pseudo-first order reaction assumption, Emodels 1, 2 and 3 by Hatta [2] and Dankwerts [4] respectively, Emodel 20, the deCoursey and Thring [44] model based on Danckwert's surface renewal theory with unequal diffusivities, Emodel 24, the recently published generalized model by Gaspar and Fosbøl [51] and Emodel 21, the Tufano et al [67] model based surface renewal theory. All these models were found to work equally well to the discretized penetration model.…”

Section: Resultsmentioning

confidence: 99%

“…Main challenges for industrial implementation of post-combustion CO2 capture are high energy requirement for regeneration, aerosol formation and degradation of the amine. Due to the high-energy penalty and aerosols emissions challenge for successful implementation of CO2 capture technologies, a great number of researchers are working in developing the new low-energy penalty solvents, aerosols emissions control, optimization and integration and scale-up of the process [2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Rate-based models have been used for the simulation of CO2 absorption process.…”

Section: Introductionmentioning

confidence: 99%

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Applicability of enhancement factor models for CO2 absorption into aqueous MEA solutions

et al. 2017

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In many chemical industrial processes, mass transfer across gas-liquid interfaces accompanied by chemical reaction is the governing phenomena. In case of mass transfer accompanied by a chemical reaction in the liquid phase, the reaction will enhance mass transfer and generally the mass transfer enhancement is quantified in terms of an enhancement factor. Large number of enhancement factor models have been developed in literature and used without critical analysis for analyzing pilot data for CO2 absorption into aqueous amines. In order to perform such a critical analysis, 24 models are tested using lab-scale experimental data from four independent apparatuses for CO2 absorption into MEA solutions covering a range of different conditions such as short and long contact times, with and without gas phase resistance, high and low CO2 loadings and temperatures. Of the 24 enhancement factor models tested only six models were found to satisfactorily predict the experimental CO2 fluxes. These were the models based on the simple pseudo-first order reaction assumption, Emodels 1, 2 and 3 by Hatta [2] and Dankwerts [4] respectively, Emodel 20, the deCoursey and Thring [44] model based on Danckwert's surface renewal theory with unequal diffusivities, Emodel 24, the recently published generalized model by Gaspar and Fosbøl [51] and Emodel 21, the Tufano et al. [67] model based surface renewal theory. All these models were found to work equally well to the discretized penetration model. No significant difference was found between Emodels 1, 2 and 3, indicating that whether one uses as basis a film, penetration or surface renewal model, is of insignificant importance. The success of the simple models is attributed to the short contact times in the experiments used as basis and the accuracy of the kinetic model. Contact times of the same magnitude between mixing points is also encountered in industrial packings and it is believed that the simple enhancement factor models may work well also in these cases if an accurate kinetic model is used.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Applicability of enhancement factor models for CO2 absorption into aqueous MEA solutions

et al. 2017

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“…This is due to the beneficial molecular structure of 1-(2-HE)PP which results in better properties in CO 2 capture. 28 The CO 2 absorption heat of 1-(2-HE)PP (34.0 kJ/mol) is much lower than that of MEA (84.3 kJ/mol), DEA (66.9 kJ/mol), and MDEA (54.6 kJ/mol). 38…”

Section: General Evaluation Of 1-(2-he)pp For Co 2 Absorptionmentioning

confidence: 91%

“…The CO Figure 8. 28,[32][33][34][35] Among the comparison of tertiary amines, 1-(2-HE)PP shows superior performance on CO 2 absorption in both equilibrium CO 2 solubility and the second order rate constant. This is due to the beneficial molecular structure of 1-(2-HE)PP which results in better properties in CO 2 capture.…”

Section: General Evaluation Of 1-(2-he)pp For Co 2 Absorptionmentioning

confidence: 99%

Analysis of equilibrium CO₂ solubility and thermodynamic models for aqueous 1‐(2‐hydoxyethyl)‐piperidine solution

et al. 2019

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1-(2-Hydoxyethyl)-piperidine (1-(2HE)-PP) is a new tertiary amine with desirable properties and can be potentially used to formulate superior absorbents for CO 2 capture. The equilibrium CO 2 solubility of 1-(2HE)-PP solution is measured over temperatures from 298 to 333 K, CO 2 partial pressures from 8.1 to 101.3 kPa and initial amine concentrations from 1 to 5 M. Two thermodynamic models, namely semiempirical model and activity coefficient model are developed for the system. The activity coefficient model shows better estimation solubility with an absolute average relative deviation (AARD) of 7.6%. In the comparison between the two models, a comprehensive analysis is presented. Some suggestions are provided for the similar model development. In addition, the speciation plot of CO 2 loaded 1-(2HE)-PP solution is predicted based on the activity coefficient model. The predictive pH values agree well with experimental data with AARD of 1.0%. Finally, the potential of 1-(2-HE)PP to be an alternative amine in CO 2 capture is evaluated. K E Y W O R D S 1-(2-hydoxyethyl)-piperidine, CO 2 capture, equilibrium CO 2 solubility, speciation, thermodynamic model 1 | INTRODUCTION Excessive CO 2 emission from the combustion of fossil fuel has to be controlled due to global warming and climate change. However, fuel energy is still an important part of worldwide energy structure in the short and medium term. It requires a feasible technology to capture CO 2 from coal-fired power plants. Post-combustion capture of CO 2 (PCC) using amine solution is recognized to be one of the most viable technologies to reduce anthropogenic CO 2 emission in the visible future. 1,2

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“…For example, the reaction molar ratio of tertiary amine and CO 2 is 1:1 to formed bicarbonate structure, while the reaction molar ratio of primary amine or secondary amine and CO 2 is 0.5:1 to formed carbamate structure (Sartorl and Savage, 1983). Tertiary amine can be able to generate a bicarbonate due to no hydrogen on nitrogen when reacted with CO 2 and H 2 O, resulting in a better CO 2 adsorption and lower energy depletion for regeneration (Xiao et al, 2016(Xiao et al, , 2019. Moreover, kinetics is important since it can explain the dynamic adsorption of the sorbent, a lot of kinetic models are applied to the CO 2 adsorption property of tertiary amine (Liu et al, 2019b).…”

Section: Introductionmentioning

confidence: 99%

CO2 Capture With Absorbents of Tertiary Amine Functionalized Nano–SiO2

et al. 2020

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To improve CO 2 adsorption performance of nanoparticle absorbents, a novel tertiary amine functionalized nano-SiO 2 (NS-NR 2 ) was synthesized based on the 3-aminopropyltrimethoxysilane (KH540) modified nano-SiO 2 (NS-NH 2 ) via methylation. The chemical structure and performances of the NS-NR 2 were characterized through a series of experiments, which revealed that NS-NR 2 can react with CO 2 in water and nanofluid with low viscosity revealed better CO 2 capture. The CO 2 capture mechanism of NS-NR 2 was studied by kinetic models. From the correlation coefficient, the pseudo second order model was found to fit well with the experiment data. The influencing factors were investigated, including temperature, dispersants, and cycling numbers. Results has shown the additional surfactant to greatly promote the CO 2 adsorption performance of NS-NR 2 because of the better dispersity of nanoparticles. This work proved that NS-NR 2 yields low viscosity, high capacity for CO 2 capture, and good regenerability in water. NS-NR 2 with high CO 2 capture will play a role in storing CO 2 to enhanced oil recovery in CO 2 flooding.

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A study of structure–activity relationships of commercial tertiary amines for post-combustion CO2 capture

Cited by 156 publications

References 45 publications

Applicability of enhancement factor models for CO2 absorption into aqueous MEA solutions

Applicability of enhancement factor models for CO2 absorption into aqueous MEA solutions

Analysis of equilibrium CO₂ solubility and thermodynamic models for aqueous 1‐(2‐hydoxyethyl)‐piperidine solution

CO2 Capture With Absorbents of Tertiary Amine Functionalized Nano–SiO2

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A study of structure–activity relationships of commercial tertiary amines for post-combustion CO2 capture

Cited by 156 publications

References 45 publications

Applicability of enhancement factor models for CO2 absorption into aqueous MEA solutions

Applicability of enhancement factor models for CO2 absorption into aqueous MEA solutions

Analysis of equilibrium CO2 solubility and thermodynamic models for aqueous 1‐(2‐hydoxyethyl)‐piperidine solution

CO2 Capture With Absorbents of Tertiary Amine Functionalized Nano–SiO2

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Product

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Analysis of equilibrium CO₂ solubility and thermodynamic models for aqueous 1‐(2‐hydoxyethyl)‐piperidine solution