Artificial rock weathering can potentially fix a large amount of CO 2 generated from industrial and other sources with a slight expense of mechanical energy. From technological, economic, and environmental perspectives, artificial rock weathering is a preferential method to dispose carbon dioxide. Carbonate and hydrogen carbonate ions are formed spontaneously when carbon dioxide is dissolved in an aqueous solution owing to the negative Gibbs free energy. The calcium silicate component of wollastonite reacts with carbonate ions and becomes calcium carbonate and silicate. Such a reaction is economically feasible because this transformation does not require energy infusion. The products are naturally stable and can be discharged safely without pollution. Experimental results indicated that, in an aqueous solution, 1 ton of wollastonite could fix nearly 140 kg of carbon dioxide. No carbonation was observed when using talc under our experimental conditions. The study indicate that the reaction rate of artificial rock weathering may still be too slow for commercialization. Therefore, successful commercialization hinges on accelerating rock weathering reaction without increasing operational cost and increasing the efficiency of rock utilization.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.