||The suppression of greenhouse gas emission is recently considered more important than ever and consequently the development of technology for producing useful products of CO2 conversion with excellent technological economy is of interest. By applying TBR system with the heterogenized hydrogenation catalyst to waste resources including CaO, it was possible to develop a process for efficient and selective production of Ca(HCO2)2, which was not previously considered as a CO2 conversion product. According to the Techno-Economic Analysis (TEA) of the entire process, the lowest production price of Ca(HCO2)2 is ca. 450 US$/t lower than its average market price, demonstrating the high possibility of market penetration. In addition, based on life cycle assessment (LCA), the CO2 amount emitted through the process is extremely low to contribute to the reduction of CO2 emission globally in the future.