Eco-friendly and techno-economic conversion of CO2 into calcium formate, a valuable resource

Abstract

The suppression of greenhouse gas emissions is being considered more important than ever, and consequently, the development of methods to produce useful CO2 conversion products with excellent techno-economic feasibility and high CO2 reduction capability is of interest. A continuous CO2 conversion system and a heterogenized hydrogenation catalyst can be used to develop a process for the efficient and selective production of Ca(HCO2)(2), which has not been considered as a CO2 conversion product so far, from waste resources, including CaO. Techno-economic analysis of the entire process showed that the production cost of Ca(HCO2)(2) was reduced by around 16% compared with the conventional process, indicating a high possibility of market penetration. Furthermore, the estimation of the global warming index of the process through a life-cycle assessment showed that the global warming index could be reduced by about 20% compared with that of existing Ca(HCO2)(2) production processes.