| Project/Area Number |
20K05596
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 34030:Green sustainable chemistry and environmental chemistry-related
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| Research Institution | Research Institute of Innovative Technology for the Earth |
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Principal Investigator |
フィローズアラム チョウドリ 公益財団法人地球環境産業技術研究機構, その他部局等, 副主席研究員 (50727279)
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| Project Period (FY) |
2020-04-01 – 2025-03-31
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| Project Status |
Granted (Fiscal Year 2023)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | Non-Aqueous Solvent / Polyamine / Absorption Rate / Absorption Capacity / Heats of Reaction / Vapor Pressure / Viscosity / Noon-Aqueous Solvent / non-aqueos solvent / carbon dioxide / amine absorbent / cyclic capacity / regeneration energy |
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| Outline of Research at the Start |
This project proposed polyamine (PA) based NAS will be made by mixing isopropyl-functionalized polyamine (IPFPA) as absorbent and commercially available alcohol/non-alcohol as solvent. The IPFPA will be synthesized by the reduction of PA’s primary amine (-NH2) site (s) with acetone. The proposed IPFPA based NAS will not form any precipitate/solid upon exposure to CO2 and must be low viscos (cP < 20) homogeneous mixture (single phase) at the whole range of CO2 loading.
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| Outline of Annual Research Achievements |
Completed all planned isopropyl-functionalized polyamines synthesis. A total of 10 IPFPA(s) were synthesized with high purity (>98%) and excellent yield (>96%). At the same time a total of 10 organic solvents were selected from alcohols, pyrrolidines, and imidazoles. The ability to fine-tune the isopropyl functional moieties in polyamines and organic solvents permits promising IPFPA based NAS design. The NAS system was made by mixing IPFPA as absorbent and commercially available alcohol/non-alcohol as solvent. Last year we identified isopropyl functionalized polyamine IP-DMDPTA was the best performer when mixed with organic solvent 1-methylimidazole (1MIm). This year (IP-DMDPTA+1MIm) based best NAS solutions all relevant properties was measured. They are mainly CO2 absorption-desorption rate, heats of reaction, fresh and different CO2 loaded solutions viscosity, vapor pressure, and equilibrium CO2 solubility at different temperature and pressure. From above mentioned experiments the best composition was identified which give high CO2 absorption rate, high cyclic capacity of CO2, lower vapor pressure, lower viscosity and consume the minimal amount of heat energy compared to benchmark monoethanolamine (MEA) based NAS solution.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
Completed all planned isopropyl-functionalized polyamines synthesis and refine the development efforts for the “optimal” IPFPA-based NAS solution, thoroughly measure or estimate all relevant properties, and identify high performance IPFPA based NAS solution. The best NAS solution (IP-DMDPTA+1MIm) was identified which shows lower viscosity (cP < 20), lower vapor pressure, high CO2 absorption-desorption rate, high cyclic capacity of CO2, and consume the minimal amount of heat energy compared to benchmark MEA based NAS solution. These findings were presented in two international conferences.
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| Strategy for Future Research Activity |
The best performer (IP-DMDPTA + 1MIm)-based NAS solution was planned to run small laboratory scale Chemical Absorption Test Plant (CAT-Lab). To run CAT-Lab plant it needs minimum 5.0kg NAS solution. The outsourcing IP-DMDPTA chemical price is very higher than the remaining fund. As a result, it was planned to synthesize IP-DMDPTA in our laboratory. (IP-DMDPTA+1MIm) based NAS CO2-loaded solutions species will be identified by using 13C NMR spectroscopic technique. Finally conduct CAT-Lab test, finalize systems and economic analyses, and develop a path forward for bench-scale and pilot-plant testing.
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