EXPERIMENTAL ASSESSMENT OF CO2 ABSORPTION RATES FOR AQUEOUS SOLUTIONS OF HEXYLAMINE, DIMETHYLCYCLOHEXYLAMINE AND THEIR BLENDS
Highly emissive fossil origin CO2 systems are mainly combustion based. Presenting considerable investment costs and potential leaks into the environment as drawbacks, conventional amine solvent based processes remain the most mature technological option for CO2 capture. In the regeneration step of s...
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| Format: | Article |
| Language: | English |
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Alma Mater Publishing House "Vasile Alecsandri" University of Bacau
2018-09-01
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| Series: | Scientific Study & Research: Chemistry & Chemical Engineering, Biotechnology, Food Industry |
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| Online Access: | http://pubs.ub.ro/?pg=revues&rev=cscc6&num=201803&vol=3&aid=4773 |
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| author | NOHA BOULMAL RODRIGO RIVERA-TINOCO CHAKIB BOUALLOU |
| author_facet | NOHA BOULMAL RODRIGO RIVERA-TINOCO CHAKIB BOUALLOU |
| author_sort | NOHA BOULMAL |
| collection | DOAJ |
| description | Highly emissive fossil origin CO2 systems are mainly combustion based. Presenting considerable investment costs and potential leaks into the environment as drawbacks, conventional amine solvent based processes remain the most mature technological option for CO2 capture. In the regeneration step of solvents, the energy consumed in these processes is provided by steam at temperatures ranging from 120 °C till 140 °C. In order to avoid this level of temperature that fosters amine degradation, a novel series of thermomorphic solvents are studied. These solvents aim at minimizing energy consumption while improving CO2 capture and potentially replacing the consumption of steam by using waste heat. This paper presents the selection of lipophilic amine based solvents and compares the performance of hexylamine 3M aqueous solutions and the mixture of dimethylcyclohexylamine/hexylamine in aqueous solutions at different compositions. Both absorption and regeneration rates for the selected lipophilic mixtures show outstanding results compared to the benchmark solvent monoethanolamine (MEA). Absorption of CO2 was performed in a Lewis cell for temperatures 20, 30 and 40 °C. Results obtained show the impact of amine blends on the kinetics of absorption and enable novel solvents to be suggested for low energy carbon capture processes. Data collected enables apparent kinetic constants for each of the blends to be calculated. Hexylamine and dimethylcyclohexylamine aqueous blends have demonstrated higher capability to absorb CO2 at high rates. In fact, the kinetics remain similar to those of hexylamine aqueous solvents, while the regeneration tests show a rate increase induced by the dimethylcyclohexylamine. |
| first_indexed | 2024-12-13T01:41:57Z |
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| id | doaj.art-5380d62ee4f34168a51f3a523ab82db2 |
| institution | Directory Open Access Journal |
| issn | 1582-540X 1582-540X |
| language | English |
| last_indexed | 2024-12-13T01:41:57Z |
| publishDate | 2018-09-01 |
| publisher | Alma Mater Publishing House "Vasile Alecsandri" University of Bacau |
| record_format | Article |
| series | Scientific Study & Research: Chemistry & Chemical Engineering, Biotechnology, Food Industry |
| spelling | doaj.art-5380d62ee4f34168a51f3a523ab82db22022-12-22T00:03:44ZengAlma Mater Publishing House "Vasile Alecsandri" University of BacauScientific Study & Research: Chemistry & Chemical Engineering, Biotechnology, Food Industry1582-540X1582-540X2018-09-01193293312EXPERIMENTAL ASSESSMENT OF CO2 ABSORPTION RATES FOR AQUEOUS SOLUTIONS OF HEXYLAMINE, DIMETHYLCYCLOHEXYLAMINE AND THEIR BLENDSNOHA BOULMAL0RODRIGO RIVERA-TINOCO1CHAKIB BOUALLOU2MINES ParisTech, PSL-Research University, Centre of Energy Efficiency of Systems (CES), 60 Bd Saint Michel, 75006 Paris, France MINES ParisTech, PSL-Research University, Centre of Energy Efficiency of Systems (CES), 60 Bd Saint Michel, 75006 Paris, France MINES ParisTech, PSL-Research University, Centre of Energy Efficiency of Systems (CES), 60 Bd Saint Michel, 75006 Paris, France Highly emissive fossil origin CO2 systems are mainly combustion based. Presenting considerable investment costs and potential leaks into the environment as drawbacks, conventional amine solvent based processes remain the most mature technological option for CO2 capture. In the regeneration step of solvents, the energy consumed in these processes is provided by steam at temperatures ranging from 120 °C till 140 °C. In order to avoid this level of temperature that fosters amine degradation, a novel series of thermomorphic solvents are studied. These solvents aim at minimizing energy consumption while improving CO2 capture and potentially replacing the consumption of steam by using waste heat. This paper presents the selection of lipophilic amine based solvents and compares the performance of hexylamine 3M aqueous solutions and the mixture of dimethylcyclohexylamine/hexylamine in aqueous solutions at different compositions. Both absorption and regeneration rates for the selected lipophilic mixtures show outstanding results compared to the benchmark solvent monoethanolamine (MEA). Absorption of CO2 was performed in a Lewis cell for temperatures 20, 30 and 40 °C. Results obtained show the impact of amine blends on the kinetics of absorption and enable novel solvents to be suggested for low energy carbon capture processes. Data collected enables apparent kinetic constants for each of the blends to be calculated. Hexylamine and dimethylcyclohexylamine aqueous blends have demonstrated higher capability to absorb CO2 at high rates. In fact, the kinetics remain similar to those of hexylamine aqueous solvents, while the regeneration tests show a rate increase induced by the dimethylcyclohexylamine.http://pubs.ub.ro/?pg=revues&rev=cscc6&num=201803&vol=3&aid=4773absorption rateCO2 captureskineticslipophilic aminesthermomorphic solvents |
| spellingShingle | NOHA BOULMAL RODRIGO RIVERA-TINOCO CHAKIB BOUALLOU EXPERIMENTAL ASSESSMENT OF CO2 ABSORPTION RATES FOR AQUEOUS SOLUTIONS OF HEXYLAMINE, DIMETHYLCYCLOHEXYLAMINE AND THEIR BLENDS Scientific Study & Research: Chemistry & Chemical Engineering, Biotechnology, Food Industry absorption rate CO2 captures kinetics lipophilic amines thermomorphic solvents |
| title | EXPERIMENTAL ASSESSMENT OF CO2 ABSORPTION RATES FOR AQUEOUS SOLUTIONS OF HEXYLAMINE, DIMETHYLCYCLOHEXYLAMINE AND THEIR BLENDS |
| title_full | EXPERIMENTAL ASSESSMENT OF CO2 ABSORPTION RATES FOR AQUEOUS SOLUTIONS OF HEXYLAMINE, DIMETHYLCYCLOHEXYLAMINE AND THEIR BLENDS |
| title_fullStr | EXPERIMENTAL ASSESSMENT OF CO2 ABSORPTION RATES FOR AQUEOUS SOLUTIONS OF HEXYLAMINE, DIMETHYLCYCLOHEXYLAMINE AND THEIR BLENDS |
| title_full_unstemmed | EXPERIMENTAL ASSESSMENT OF CO2 ABSORPTION RATES FOR AQUEOUS SOLUTIONS OF HEXYLAMINE, DIMETHYLCYCLOHEXYLAMINE AND THEIR BLENDS |
| title_short | EXPERIMENTAL ASSESSMENT OF CO2 ABSORPTION RATES FOR AQUEOUS SOLUTIONS OF HEXYLAMINE, DIMETHYLCYCLOHEXYLAMINE AND THEIR BLENDS |
| title_sort | experimental assessment of co2 absorption rates for aqueous solutions of hexylamine dimethylcyclohexylamine and their blends |
| topic | absorption rate CO2 captures kinetics lipophilic amines thermomorphic solvents |
| url | http://pubs.ub.ro/?pg=revues&rev=cscc6&num=201803&vol=3&aid=4773 |
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