Modeling and design for electrochemical carbon dioxide capture systems
Thesis: Ph. D. in Chemical Engineering Practice, Massachusetts Institute of Technology, Department of Chemical Engineering, 2019
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2019
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| Online Access: | https://hdl.handle.net/1721.1/122532 |
| _version_ | 1811079899726741504 |
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| author | Shaw, Ryan Alex. |
| author2 | T. Alan Hatton. |
| author_facet | T. Alan Hatton. Shaw, Ryan Alex. |
| author_sort | Shaw, Ryan Alex. |
| collection | MIT |
| description | Thesis: Ph. D. in Chemical Engineering Practice, Massachusetts Institute of Technology, Department of Chemical Engineering, 2019 |
| first_indexed | 2024-09-23T11:22:19Z |
| format | Thesis |
| id | mit-1721.1/122532 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T11:22:19Z |
| publishDate | 2019 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/1225322019-11-21T03:09:12Z Modeling and design for electrochemical carbon dioxide capture systems Shaw, Ryan Alex. T. Alan Hatton. Massachusetts Institute of Technology. Department of Chemical Engineering. Massachusetts Institute of Technology. Department of Chemical Engineering Chemical Engineering. Thesis: Ph. D. in Chemical Engineering Practice, Massachusetts Institute of Technology, Department of Chemical Engineering, 2019 Cataloged from PDF version of thesis. Includes bibliographical references (pages 185-190). So long as fossil fuels remain humanity's primary source of energy, carbon dioxide capture and storage will be needed to mitigate the effects of global climate change. Existing carbon dioxide separation technology is energetically intensive and expensive to employ in brownfield applications. This thesis describes a novel CO₂ capture technology called Electrochemically-Mediated Amine Recovery (EMAR). EMAR modifies incumbent thermal amine scrubbing, by performing an electrochemical desorption which manipulates the concentration of a cupric competitive complexing agent. Oxidizing copper results in a cupric-amine complex at the anode, releasing CO₂. Reducing this complex at the cathode regenerates amines for capture. This approach is more energy efficient than traditional thermal amine processes and is expected to be less capital intensive to implement. A proof-of-concept EMAR system has been previously demonstrated and initial system optimization has been previously performed. Contained herein is a significant expansion of that work specifically in the areas of thermodynamics, mass and heat transport, and system design. Three thermodynamic paths are described for the EMAR process, which establish the total electrochemical work of separation for this and other similar molecular architectures. Electrochemical work, in concert with work of compression and pump work, allow for an ideal process flow scheme as well as optimized operating conditions for the EMAR process to be developed. The thermodynamics suggests employing a cathodic absorber for substantial efficiency improvements. EMAR cell design is significantly improved by transitioning from a single unit cell to a modular, stacked system. Performance of two stack geometries, series and parallel, is modelled and analyzed. It is demonstrated that the series stack, which is more industrially applicable, shows less severe internal temperature gradients than that of the parallel geometry. by Ryan Alex Shaw. Ph. D. in Chemical Engineering Practice Ph.D.inChemicalEngineeringPractice Massachusetts Institute of Technology, Department of Chemical Engineering 2019-10-11T22:00:36Z 2019-10-11T22:00:36Z 2019 2019 Thesis https://hdl.handle.net/1721.1/122532 1121594801 eng MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission. http://dspace.mit.edu/handle/1721.1/7582 222 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Chemical Engineering. Shaw, Ryan Alex. Modeling and design for electrochemical carbon dioxide capture systems |
| title | Modeling and design for electrochemical carbon dioxide capture systems |
| title_full | Modeling and design for electrochemical carbon dioxide capture systems |
| title_fullStr | Modeling and design for electrochemical carbon dioxide capture systems |
| title_full_unstemmed | Modeling and design for electrochemical carbon dioxide capture systems |
| title_short | Modeling and design for electrochemical carbon dioxide capture systems |
| title_sort | modeling and design for electrochemical carbon dioxide capture systems |
| topic | Chemical Engineering. |
| url | https://hdl.handle.net/1721.1/122532 |
| work_keys_str_mv | AT shawryanalex modelinganddesignforelectrochemicalcarbondioxidecapturesystems |