In order to develop a new approach to carbon capture using carbonate brines and solid acids, this research project begins the development of a theoretical basis for solid acid based capture systems and experimental work to test the validity of the theory. It appears that solid acids behave like weak acids and are able to increase the concentration of carbon dioxide above a solution compared to what would be achievable without solid acids. Experimental work aimed to show that solid acids behave as indicated by theory. Experiments partially validated the theory through demonstrating desorption of carbon dioxide from a carbonate brine. The regeneration of the solid acid with the help of a strong acid was only partially successful due to instability of the solid acid in the presence of a strong acid. The experimental work used activated.