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Simultaneous separation of CO2 and H2O from flue gas using bio-based adsorbents
Authors: Saeed Ghanbari,
Girish Kamath,
Venkatesh Meda,
Ajay K. Dalai
Identifier: CSBE19183
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Published in: CSBE-SCGAB Technical Conferences » AGM Vancouver 2019
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Description: Climate change is one of the challenges of our time and research about effective separation and sequestration of the gasses responsible for climate change is critical. Presently, flue gasses from coal and natural gas power plants are concentrated sources of gas emissions. Adsorption is one of the most effective methods of gas separation and various types of swing adsorption processes have been applied in industry. Bio-based adsorbents such as flax shives and biochar showed a great potential for gas drying and carbon capture in previous works. Biochar showed a reasonably high CO2 adsorption capacity; however, its performance sharply drops in the presence of moisture in the gas. This work was focused on separation of moisture and carbon dioxide from flue gas. A dual-layer packed bed scheme was used to simultaneously separate moisture and carbon dioxide from flue gas. Basically, the flue gas was dried in the first layer of flax shives; and then carbon dioxide was captured from the dry flue gas in the second layer of biochar. The clean flue gas was high purity nitrogen. A rigorous dynamic model was used to study this system and the effects of various parameters such as the gas superficial velocity and flue gas composition were investigated. Afterwards, the cyclic performance of the system in a dual-column vacuum swing adsorption (VSA) process was investigated. The results showed that a steady-state VSA process is feasible and carbon dioxide can be captured from flue gas using this process at reduced costs.
Keywords: Biogas, vacuum swing adsorption, carbon capture, biosorbent, economics
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Date: 2019-07-15
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Conference name: CSBE/SCGAB 2019 Annual Conference, Vancouver, BC, 14-17 July 2019.
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Type: Poster
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Publication type: Text.Abstract
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Coverage: Canada
Language 1: en
Language 2:
Rights: Canadian Society for Bioengineering
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Other files:
DOI:
Description: Climate change is one of the challenges of our time and research about effective separation and sequestration of the gasses responsible for climate change is critical. Presently, flue gasses from coal and natural gas power plants are concentrated sources of gas emissions. Adsorption is one of the most effective methods of gas separation and various types of swing adsorption processes have been applied in industry. Bio-based adsorbents such as flax shives and biochar showed a great potential for gas drying and carbon capture in previous works. Biochar showed a reasonably high CO2 adsorption capacity; however, its performance sharply drops in the presence of moisture in the gas. This work was focused on separation of moisture and carbon dioxide from flue gas. A dual-layer packed bed scheme was used to simultaneously separate moisture and carbon dioxide from flue gas. Basically, the flue gas was dried in the first layer of flax shives; and then carbon dioxide was captured from the dry flue gas in the second layer of biochar. The clean flue gas was high purity nitrogen. A rigorous dynamic model was used to study this system and the effects of various parameters such as the gas superficial velocity and flue gas composition were investigated. Afterwards, the cyclic performance of the system in a dual-column vacuum swing adsorption (VSA) process was investigated. The results showed that a steady-state VSA process is feasible and carbon dioxide can be captured from flue gas using this process at reduced costs.
Keywords: Biogas, vacuum swing adsorption, carbon capture, biosorbent, economics
Résumé:
Mots-clés:
Citation:
Volume:
Issue:
Pages -
Contributor:
Date: 2019-07-15
Technical field:
Conference name: CSBE/SCGAB 2019 Annual Conference, Vancouver, BC, 14-17 July 2019.
Session name:
Other information:
Type: Poster
Format:
Publication type: Text.Abstract
Source:
Relation:
Coverage: Canada
Language 1: en
Language 2:
Rights: Canadian Society for Bioengineering
Notes:
Other files:
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