Indirect air CO2 capture and refinement based on OTEC seawater outgassing
Summary: In this paper, we propose a low-cost method to capture and purify CO2 from ocean water indirectly from the atmosphere. Atmospheric CO2 dissolves in seawater following Henry's law. In open-cycle ocean thermal energy conversion (OC-OTEC), being a heat engine, large quantities of water ar...
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doaj-6cecb2a410554c71b4c30b8ebbd556162021-07-23T04:50:27ZengElsevieriScience2589-00422021-07-01247102754Indirect air CO2 capture and refinement based on OTEC seawater outgassingPaul J.T. Straatman0Wilfried G.J.H.M. van Sark1Indorama Ventures Europe B.V., Markweg 201, Harbour number 63473198, NB Europoort, the NetherlandsUtrecht University, Copernicus Institute of Sustainable Development, Princetonlaan 8a, 3584 CB Utrecht, the Netherlands; Corresponding authorSummary: In this paper, we propose a low-cost method to capture and purify CO2 from ocean water indirectly from the atmosphere. Atmospheric CO2 dissolves in seawater following Henry's law. In open-cycle ocean thermal energy conversion (OC-OTEC), being a heat engine, large quantities of water are used to generate electricity from temperature differences in the ocean. CO2 and other gases dissolved in seawater are extracted from seawater by a vacuum compressor, being essential for heat transfer in OC-OTEC. Non-condensable gases containing CO2 from OC-OTEC are currently considered a waste gas stream. Based on literature, we calculate cold water non-condensables containing up to 14% CO2. These non-condensables can be refined further to 80–90% purity with a water absorption process, inspired by those as used in the biogas industry. Levelized CO2 capture and purification costs were estimated to be 15–35 euro per ton, as only refinement costs are allocated of a waste gas stream of OC-OTEC.http://www.sciencedirect.com/science/article/pii/S2589004221007227Earth sciencesEnergy engineeringEnergy resourcesEnergy sustainabilityEngineering |
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DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Paul J.T. Straatman Wilfried G.J.H.M. van Sark |
spellingShingle |
Paul J.T. Straatman Wilfried G.J.H.M. van Sark Indirect air CO2 capture and refinement based on OTEC seawater outgassing iScience Earth sciences Energy engineering Energy resources Energy sustainability Engineering |
author_facet |
Paul J.T. Straatman Wilfried G.J.H.M. van Sark |
author_sort |
Paul J.T. Straatman |
title |
Indirect air CO2 capture and refinement based on OTEC seawater outgassing |
title_short |
Indirect air CO2 capture and refinement based on OTEC seawater outgassing |
title_full |
Indirect air CO2 capture and refinement based on OTEC seawater outgassing |
title_fullStr |
Indirect air CO2 capture and refinement based on OTEC seawater outgassing |
title_full_unstemmed |
Indirect air CO2 capture and refinement based on OTEC seawater outgassing |
title_sort |
indirect air co2 capture and refinement based on otec seawater outgassing |
publisher |
Elsevier |
series |
iScience |
issn |
2589-0042 |
publishDate |
2021-07-01 |
description |
Summary: In this paper, we propose a low-cost method to capture and purify CO2 from ocean water indirectly from the atmosphere. Atmospheric CO2 dissolves in seawater following Henry's law. In open-cycle ocean thermal energy conversion (OC-OTEC), being a heat engine, large quantities of water are used to generate electricity from temperature differences in the ocean. CO2 and other gases dissolved in seawater are extracted from seawater by a vacuum compressor, being essential for heat transfer in OC-OTEC. Non-condensable gases containing CO2 from OC-OTEC are currently considered a waste gas stream. Based on literature, we calculate cold water non-condensables containing up to 14% CO2. These non-condensables can be refined further to 80–90% purity with a water absorption process, inspired by those as used in the biogas industry. Levelized CO2 capture and purification costs were estimated to be 15–35 euro per ton, as only refinement costs are allocated of a waste gas stream of OC-OTEC. |
topic |
Earth sciences Energy engineering Energy resources Energy sustainability Engineering |
url |
http://www.sciencedirect.com/science/article/pii/S2589004221007227 |
work_keys_str_mv |
AT pauljtstraatman indirectairco2captureandrefinementbasedonotecseawateroutgassing AT wilfriedgjhmvansark indirectairco2captureandrefinementbasedonotecseawateroutgassing |
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