exergy, economical and environmental analysis of a natural gas direct chemical looping carbon capture and formic acid-based hydrogen storage system

Chemical looping combustion is one of the novel technologies in energy, which can co-generate hydrogen and power with an efficient carbon capture process to control the system’s emission. this system’s carbon capture process is one of the main processes to achieve the united nations’ environmental goals and other climate change control agencies. this paper aims to study designing a natural gas direct chemical looping carbon capture and formic acid hydrogen storage system for a combined cycle power plant and analyze it with energy, exergy, and environmental factors. the model was implemented on a 500 mw combined cycle power plant unit in iran, and the results show that if the model is implemented on the plant, overall energy efficiency can be increased by 33%. furthermore, according to the references, carbon emissions decreased by more than 93%, which is achievable using chemical looping combustion.