(573t) Assessing and Unlocking the Potential for Carbon Mineralization in Peridotite Rock for Carbon Dioxide Removal

Climate change has reached a critical level, necessitating urgent actions in the form of carbon dioxide removal (CDR) technologies from the air. Among these, carbon mineralization process, especially in-situ carbon mineralization, is a critical technology for CDR due to its potential for large-scale storage capacity and security at relatively low cost. Peridotite rock, known for its high potential and reactivity, remains unexplored for engineered in-situ carbon mineralization site. Additionally, peridotite rock typically contains Ni at around 2000 ppm, making it a potentially valuable unconventional source for energy-relevant elements. In this regard, this study aims to investigate the parameters influencing the reactivity of peridotite and how these parameters alter the morphological and chemical properties of solid, as well as the aqueous chemistry due to the reactions at rock-H₂O interfaces. While these parameters are inherently interdependent, this study focuses on elucidating the effect of each parameter, such as pH, temperature, and water composition using spectroscopic and electron microscopic analysis. Moreover, we seek to assess the impact of each parameter to gain insights into the feasibility of in-situ carbon mineralization of peridotite rock-host reservoir and the sensitivities of the related parameters during geological CO₂ storage. By shedding light on these factors, our study aims to contribute valuable knowledge to the development of effective strategies for geological CO₂ storage with comprehensive consideration of aqueous chemistry, thereby aiding in climate change mitigation.