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

Chen, Pao Chi; Lin, Sheng-Zhong

doi:10.3390/app8112041

Cited by 15 publications

(23 citation statements)

References 35 publications

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“…Table 4 presents the values calculated by Equations (14)- (17), where the range of E is 61.33-100%, RA is 4.02-26.48 × 10 −4 (mol/s.L), KGa is 0.229-0.798(s −1 ), and  is 0.034-0.263 (mole/mole•L). These data are comparable with those reported earlier [42,45,46]. Table 5 showed that the data obtained in this work, such as KGa in the range of 0.229-0.789 s −1 , were higher than that of the sodium glycinate solution (0.051-0.189 s −1 ), the ammonia solution (0.0136-0.3302 s −1 ), the NaOH solution (0.015-0.246 s −1 ), and the MEA solution (0.0377-0.8881 s −1 ).…”

Section: Operation and Data Calculation Of The Steady-state Conditionsupporting

confidence: 93%

“…Therefore, the CO2 of flue gas in a coal-fired power plant at a 15% concentration of and at 50 °C was simulated to enter the column. According to previous works [41,42], the absorption of CO2 in the bubble-column scrubber is affected by the gas flow rate, the liquid flow rate, the concentration of the solvent, as well as the temperature and pH. In order to select the mixed amines, the type of mixed amines (A), the ratio of mixed amines (B), the liquid-flow rate (C), the gas-flow rate (D), and the concentration of mixed amines (E) were considered as the condition factors, and four levels for each condition factor were taken respectively, i.e., the ratio of mixed amine (5-20 wt%), gas-flow rate, Qg, (3-12 L/min), concentration of the mixed amines (1-2.5 M), and the liquid-flow rate, QL, (0.15-0.3 L/min).…”

Section: Absorption Experiments Designmentioning

confidence: 99%

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Selection of Mixed Amines in the CO2 Capture Process

Chen

Cho

Jhuang

et al. 2021

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In order to select the best mixed amines in the CO2 capture process, the absorption of CO2 in mixed amines was explored at the required concentrations by using monoethanolamine (MEA) as a basic solvent, mixed with diisopropanolamine (DIPA), triethanolamine (TEA), 2-amino-2-methyl-1-propanol (AMP), and piperazine (PZ). Here, a bubble column was used as the scrubber, and a continuous operation was adopted. The Taguchi method was used for the experimental design. The conditional factors included the type of mixed amine (A), the ratio of the mixed amines (B), the liquid feed flow (C), the gas-flow rate (D), and the concentration of mixed amines (E). There were four levels, respectively, and a total of 16 experiments. The absorption efficiency (EF), absorption rate (RA), overall mass transfer coefficient (KGa), and scrubbing factor (<i>ϕ</i>) were used as indicators and were determined in a steady-state by the mass balance and two-film models. According to the Taguchi analysis, the importance of the parameters and the optimum conditions were obtained. In terms of the absorption efficiency (EF), the absorption rate (absorption factor) (RA/<i>ϕ</i>), and the overall mass transfer coefficient (KGa), the order of importance is D > E > A > B > C, D > E > C > B > A, and D > E > C > A > B, respectively, and the optimum conditions are A1B4C4D3E3, A1B3C4D4E2, A4B2C3D4E4, and A1B1C1D4E1. The optimum condition validation results showed that the optimal values of EF, RA, and KGa are 100%, 30.69 × 10−4 mol/s·L, 1.540 l/s, and 0.269, respectively. With regard to the selection of mixed amine, it was found that the mixed amine (MEA + AMP) performed the best in the CO2 capture process.

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Section: Operation and Data Calculation Of The Steady-state Conditionsupporting

confidence: 93%

Section: Absorption Experiments Designmentioning

confidence: 99%

Selection of Mixed Amines in the CO2 Capture Process

Chen

Cho

Jhuang

et al. 2021

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“…The optimization model indicated that the volumetric flow rate of gas and the volumetric flow rate of liquid strongly influenced the absorption efficiency. This was in agreement with the optimization of other absorption systems reported in the literature [7,26]. The precision of this model was verified based on the coefficient of determination (R 2 ) by the parity plot between the experimental and predicted values in terms of the response parameter as shown in Figure 6a.…”

Section: Correlation Modelsupporting

confidence: 89%

Mass Transfer Correlation and Optimization of Carbon Dioxide Capture in a Microchannel Contactor: A Case of CO2-Rich Gas

et al. 2020

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This work focused on the application of a microchannel contactor for CO2 capture using water as absorbent, especially for the application of CO2-rich gas. The influence of operating conditions (temperature, volumetric flow rate of gas and liquid, and CO2 concentration) on the absorption efficiency and the overall liquid-side volumetric mass transfer coefficient was presented in terms of the main effects and interactions based on the factorial design of experiments. It was found that 70.9% of CO2 capture was achieved under the operating conditions as follows; temperature of 50 °C, CO2 inlet fraction of 53.7%, total gas volumetric flow rate of 150 mL min−1, and adsorbent volumetric flow rate of 1 mL min−1. Outstanding performance of CO2 capture was demonstrated with the overall liquid-side volumetric mass transfer coefficient of 0.26 s−1. Further enhancing the system by using 2.2 M of monoethanolamine in water (1:1 molar ratio of MEA-to-CO2) boosted the absorption efficiency up to 88%.

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“…Among these technologies, an absorption-desorption process for post-combustion has been widely used [1]. A number of solvents have been adopted for the capture of CO 2 [2][3][4]. In these solvents, amines are most extensively used in chemical absorption to capture CO 2 [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, understanding the parameter significance and optimization conditions in order to reduce regeneration energy needs was required. This could be done by using the Taguchi experimental design [4,5].…”

Section: Introductionmentioning

confidence: 99%

Optimization in the Stripping Process of CO2 Gas Using Mixed Amines

Chen

Lai

2019

Energies

Self Cite

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The aim of this work was to explore the effects of variables on the heat of regeneration, the stripping efficiency, the stripping rate, the steam generation rate, and the stripping factor. The Taguchi method was used for the experimental design. The process variables were the CO2 loading (A), the reboiler temperature (B), the solvent flow rate (C), and the concentration of the solvent (monoethanolamine (MEA) + 2-amino-2-methyl-1-propanol (AMP)) (D), which each had three levels. The stripping efficiency (E), stripping rate ( m ˙ CO 2 ), stripping factor (β), and heat of regeneration (Q) were determined by the mass and energy balances under a steady-state condition. Using signal/noise (S/N) analysis, the sequence of importance of the parameters and the optimum conditions were obtained, and the optimum operating conditions were further validated. The results showed that E was in the range of 20.98–55.69%; m ˙ CO 2 was in the range of 5.57 × 10−5–4.03 × 10−4 kg/s, and Q was in the range of 5.52–18.94 GJ/t. In addition, the S/N ratio analysis showed that the parameter sequence of importance as a whole was A > B > D > C, while the optimum conditions were A3B3C1D1, A3B3C3D2, and A3B2C2D2, for E, m ˙ CO 2 , and Q, respectively. Verifications were also performed and were found to satisfy the optimum conditions. Finally, the correlation equations that were obtained were discussed and an operating policy was discovered.

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

Cited by 15 publications

References 35 publications

Selection of Mixed Amines in the CO2 Capture Process

Selection of Mixed Amines in the CO2 Capture Process

Mass Transfer Correlation and Optimization of Carbon Dioxide Capture in a Microchannel Contactor: A Case of CO2-Rich Gas

Optimization in the Stripping Process of CO2 Gas Using Mixed Amines

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