Work

Hidden Acidification Challenges in Electrochemical Ocean Decarbonization

Year: 2025

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide Electrochemical direct ocean capture (eDOC) is an emerging methodology for carbon capture. However, our comprehensive thermodynamic and initial kinetic analyses reveal critical challenges inherent in the electrochemical pH-swing process. Specifically, the mixture of treated ocean water post-eDOC fails to achieve complete neutralization, resulting in unintended ocean acidification. This issue stems from the disproportionate impacts of acidification and alkalinization on dissolved inorganic carbon dynamics and hydroxide precipitation. Our findings underscore the necessity for innovative process designs that effectively balance pH shifts and manage precipitate formation, thereby ensuring the environmental sustainability of eDOC technologies.

Source: ACS Energy Letters

DOI: 10.1021/acsenergylett.5c00900

Authors: Wei Zhang, Adnan Ozden, Yu Yang, Aoni Xu, Fengwang Li

Institutions: The University of Sydney, Khalifa University of Science and Technology

Language: English

Topic: Carbon Dioxide Capture Technologies

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Climate action, Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $4,500