Thermodynamics analysis of generation of green hydrogen and methanol through carbon dioxide capture

This extensive study delves into analyzing carbon dioxide (CO 2 )-capturing green hydrogen plant, exploring its operation using multiple electrolysis techniques and examining their efficiency and impact on environment. The solar energy is used for the electrolysis to make hydrogen. Emitted CO 2 from thermal power plants integrate with green hydrogen and produces methanol. It is a process crucial for mitigating environmental damage and fostering sustainable energy practices. The findings demonstrated that solid oxide electrolysis is the most effective process by which hydrogen can be produced with significant rate of 90 % efficiency. Moreover, proton exchange membrane (PEM) becomes a viable and common method with an 80 % efficiency, whereas the alkaline electrolysis has a moderate level of 63 % efficiency. Additionally, it was noted that the importance of seasonal fluctuations, where the capturing of CO 2 is maximum in summer months and less in the winter is an important factor to consider in order to maximize the working of the plant and the allocation of resources.