Electrochemical mineral carbonation: A sustainable approach to CO₂ capture and utilization

Abstract

Mineral carbonation for CO₂ capture and utilization often requires high temperatures and pressures, necessitating alternative approaches. Electrochemical carbon capture has emerged as a promising technology due to its high efficiency and selectivity. However, its high capital expenditure (CAPEX) remains a challenge. In this study, carbon cloth (CC) electrodes were evaluated for their potential to enhance carbon capture, mineralization, and hydrogen production. The stability of conductive CC was confirmed as a substitute electrode under strong acidic and basic conditions, maintaining consistent contact angle and surface resistance. CC-based electrodes facilitated carbonate formation by inducing pH shifts through applied currents, achieving mineralization and hydrogen production efficiencies comparable to conventional methods. Furthermore, CC-based electrochemical systems demonstrated reduced environmental impacts, including lower global warming potential, toxicity, and eutrophication. These finding highlight the potential of CC-based electrodes as a cost-effective and sustainable alternative for electrochemical carbon capture, contributing to climate change mitigation and sustainable development.