CO2 in seawater is in equilibrium with that in the atmosphere, so there's a constant exchange, and the ocean is a primary (short-term) sink of CO2. The advanta

CO2 in seawater is in equilibrium with that in the atmosphere, so there's a constant exchange, and the ocean is a primary (short-term) sink of CO2. The advantage of sourcing CO2 from seawater as opposed to the atmosphere is that the energy cost of doing so is far lower. That's a key message (unsure if it's an original finding) of 2010s USNRL research by Willauer et al I'd looked at when it made news a ways back. <https://web.archive.org/web/20230604174145/https://old.reddit.com/r/dredmorbius/comments/22k71x/us_navy_electricitytofuel_synthesis_papers_and/ https://web.archive.org/web/20230604174145/https://old.reddi...> - "The Feasibility and Current Estimated Capital Costs of Producing Jet Fuel at Sea Using Carbon Dioxide and Hydrogen". Heather D. Willauer, Dennis R. Hardy, Frederick W. Williams. Navy Technology Center for Safety and Survivability, Chemistry Division. September 29, 2010. NRL/MRi6180--10-9300 <https://web.archive.org/web/20230604174145/http://www.dtic.mil/get-tr-doc/pdf?AD=ADA539765 https://web.archive.org/web/20230604174145/http://www.dtic.m...> - "Extraction of Carbon Dioxide from Seawater by an Electrochemical Acidification Cell Part I--Initial Feasibility Studies". Felice DiMascio, Heather D. Willauer, Dennis R. Hardy, M. Kathleen Lewis, Frederick W. Williams. Navy Technology Center for Safety and Survivability, Chemistry Division. July 23, 2010. NRL/MR/6180--10-9274 <https://web.archive.org/web/20230604174145/http://www.dtic.mil/get-tr-doc/pdf?AD=ADA544002 https://web.archive.org/web/20230604174145/http://www.dtic.m...> - "Extraction of Carbon Dioxide from Seawater by an Electrochemical Acidification Cell Part II--Laboratory Scaling Studies eather D. Willauer". Heather D. Willauer, Felice DiMascio, Dennis R. Hardy, M. Kathleen Lewis, Frederick W. Williams. Navy Technology Center for Safety and Survivability, Chemistry Division. April 11, 2011. NRL/MR/6180--11-9329 <https://web.archive.org/web/20230604174145/http://www.dtic.mil/get-tr-doc/pdf?AD=ADA544072 https://web.archive.org/web/20230604174145/http://www.dtic.m...> - "Extraction of Carbon Dioxide and Hydrogen from Seawater by an Electrochemical Acidification Cell Part III: Scaled-up Mobile Unit Studies (Calendar Year 2011)". Heather D. Willauer, Dennis R. Hardy, Frederick W. Williams, Felice DiMascio. May 30, 2012. NRL/MR/6300--12-9414 <https://web.archive.org/web/20230604174145/http://www.dtic.mil/get-tr-doc/pdf?AD=ADA565466 https://web.archive.org/web/20230604174145/http://www.dtic.m...> - "Extraction of Carbon Dioxide and Hydrogen from Seawater by an Electrochemical Acidification Cell Part IV: Electrode Compartments of Cell Modified and Tested in Scaled-Up Mobile Unit". Heather D. Willauer, Dennis R. Hardy, Frederick W. Williams, Felice DiMascio. September 3, 2013. NRL/MR/6300--13-9463 <https://web.archive.org/web/20230604174145/http://www.dtic.mil/get-tr-doc/pdf?AD=ADA589263 https://web.archive.org/web/20230604174145/http://www.dtic.m...> Other and earlier research: <https://web.archive.org/web/20230601122020/https://old.reddit.com/r/dredmorbius/comments/28nqoz/electrical_fuel_synthesis_from_seawater_older/ https://web.archive.org/web/20230601122020/https://old.reddi...>