Capture of CO<sub>2</sub> Using Mixed Amines and Solvent Regeneration in a Lab-Scale Continuous Bubble-Column Scrubber
This study used monoethanolamine (MEA) as an amine-based solvent, which was blended with secondary amines (DIPA), tertiary amines, stereo amines, and piperazine (PZ) to prepare mixed amines at the required concentrations, which were used as the test solvents. To search for the best-mixed amines, a c...
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MDPI AG
2023-06-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/12/7321 |
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| author | Pao-Chi Chen Jyun-Hong Jhuang Ting-Wei Wu Chen-Yu Yang Kuo-Yu Wang Chang-Ming Chen |
| author_facet | Pao-Chi Chen Jyun-Hong Jhuang Ting-Wei Wu Chen-Yu Yang Kuo-Yu Wang Chang-Ming Chen |
| author_sort | Pao-Chi Chen |
| collection | DOAJ |
| description | This study used monoethanolamine (MEA) as an amine-based solvent, which was blended with secondary amines (DIPA), tertiary amines, stereo amines, and piperazine (PZ) to prepare mixed amines at the required concentrations, which were used as the test solvents. To search for the best-mixed amines, a continuous bubble-column scrubber was adopted to explore the performance of mixed solvents presented in this study. The solvent regeneration test was also carried out at different temperatures. The selected factors included the type of mixed amine (A), the ratio of mixed amines (B), the liquid feed flow (C), the gas flow rate (D), the concentration of mixed amines (E), and the liquid temperature (F), each having five levels. Using the Taguchi experimental design, the conventional experimental number could be reduced from 15,625 to 25, saving much time and cost. The absorption efficiency (E<sub>F</sub>), absorption rate (R<sub>A</sub>), overall mass-transfer coefficient (<i>K<sub>G</sub>a</i>), and absorption factor (ϕ) were estimated as the indicators. After the Taguchi analysis, E, D, and C were found to play important roles in the capture of CO<sub>2</sub> gas. Verifications of optimum conditions were found to be 100%, 19.96 × 10<sup>−4</sup> mole/s·L, 1.2312 1/s, and 0.6891 mol-CO<sub>2</sub>/L·mol-solvent for E<sub>F</sub>, <i>R<sub>A</sub>, K<sub>G</sub>a</i>, and ϕ, respectively. The evaluated indexes suggested that MEA + PZ was the best-mixed amine, followed by MEA and MEA + DIPA. The solvent regeneration tests for the scrubbed solutions performed at different optimum conditions showed that the heat of the regeneration sequence was in the order of MEA > MEA + PZ > MEA + DIPA with minimum energy required at 110 °C. The individual energy required was also analyzed here. |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T02:47:50Z |
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| spelling | doaj.art-8f2c2930f1314675be18470e7d02a76d2023-11-18T09:12:13ZengMDPI AGApplied Sciences2076-34172023-06-011312732110.3390/app13127321Capture of CO<sub>2</sub> Using Mixed Amines and Solvent Regeneration in a Lab-Scale Continuous Bubble-Column ScrubberPao-Chi Chen0Jyun-Hong Jhuang1Ting-Wei Wu2Chen-Yu Yang3Kuo-Yu Wang4Chang-Ming Chen5Department of Chemical and Materials Engineering, Lunghwa University of Science and Technology, Taoyuan City 33306, TaiwanDepartment of Chemical and Materials Engineering, Lunghwa University of Science and Technology, Taoyuan City 33306, TaiwanDepartment of Chemical and Materials Engineering, Lunghwa University of Science and Technology, Taoyuan City 33306, TaiwanDepartment of Chemical and Materials Engineering, Lunghwa University of Science and Technology, Taoyuan City 33306, TaiwanDepartment of Chemical and Materials Engineering, Lunghwa University of Science and Technology, Taoyuan City 33306, TaiwanDepartment of Chemical and Materials Engineering, Lunghwa University of Science and Technology, Taoyuan City 33306, TaiwanThis study used monoethanolamine (MEA) as an amine-based solvent, which was blended with secondary amines (DIPA), tertiary amines, stereo amines, and piperazine (PZ) to prepare mixed amines at the required concentrations, which were used as the test solvents. To search for the best-mixed amines, a continuous bubble-column scrubber was adopted to explore the performance of mixed solvents presented in this study. The solvent regeneration test was also carried out at different temperatures. The selected factors included the type of mixed amine (A), the ratio of mixed amines (B), the liquid feed flow (C), the gas flow rate (D), the concentration of mixed amines (E), and the liquid temperature (F), each having five levels. Using the Taguchi experimental design, the conventional experimental number could be reduced from 15,625 to 25, saving much time and cost. The absorption efficiency (E<sub>F</sub>), absorption rate (R<sub>A</sub>), overall mass-transfer coefficient (<i>K<sub>G</sub>a</i>), and absorption factor (ϕ) were estimated as the indicators. After the Taguchi analysis, E, D, and C were found to play important roles in the capture of CO<sub>2</sub> gas. Verifications of optimum conditions were found to be 100%, 19.96 × 10<sup>−4</sup> mole/s·L, 1.2312 1/s, and 0.6891 mol-CO<sub>2</sub>/L·mol-solvent for E<sub>F</sub>, <i>R<sub>A</sub>, K<sub>G</sub>a</i>, and ϕ, respectively. The evaluated indexes suggested that MEA + PZ was the best-mixed amine, followed by MEA and MEA + DIPA. The solvent regeneration tests for the scrubbed solutions performed at different optimum conditions showed that the heat of the regeneration sequence was in the order of MEA > MEA + PZ > MEA + DIPA with minimum energy required at 110 °C. The individual energy required was also analyzed here.https://www.mdpi.com/2076-3417/13/12/7321scrubbertaguchi analysismixed amineoverall mass-transfer coefficient |
| spellingShingle | Pao-Chi Chen Jyun-Hong Jhuang Ting-Wei Wu Chen-Yu Yang Kuo-Yu Wang Chang-Ming Chen Capture of CO<sub>2</sub> Using Mixed Amines and Solvent Regeneration in a Lab-Scale Continuous Bubble-Column Scrubber Applied Sciences scrubber taguchi analysis mixed amine overall mass-transfer coefficient |
| title | Capture of CO<sub>2</sub> Using Mixed Amines and Solvent Regeneration in a Lab-Scale Continuous Bubble-Column Scrubber |
| title_full | Capture of CO<sub>2</sub> Using Mixed Amines and Solvent Regeneration in a Lab-Scale Continuous Bubble-Column Scrubber |
| title_fullStr | Capture of CO<sub>2</sub> Using Mixed Amines and Solvent Regeneration in a Lab-Scale Continuous Bubble-Column Scrubber |
| title_full_unstemmed | Capture of CO<sub>2</sub> Using Mixed Amines and Solvent Regeneration in a Lab-Scale Continuous Bubble-Column Scrubber |
| title_short | Capture of CO<sub>2</sub> Using Mixed Amines and Solvent Regeneration in a Lab-Scale Continuous Bubble-Column Scrubber |
| title_sort | capture of co sub 2 sub using mixed amines and solvent regeneration in a lab scale continuous bubble column scrubber |
| topic | scrubber taguchi analysis mixed amine overall mass-transfer coefficient |
| url | https://www.mdpi.com/2076-3417/13/12/7321 |
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