Two new patents from experts at TU Bergakademie Freiberg introduce an innovative technology for producing blue hydrogen from resources that are no longer extractable. By utilizing more than 30% of hydrocarbons that remain underground after depletion, the patented process opens up climate-friendly potential for blue hydrogen production. Unlike traditional methods that rely on above-ground extraction from crude oil, natural gas, or coal, this technology enables direct production within extracted reservoirs. Professor Moh'd Amro highlights the economic and environmental benefits of this approach, emphasizing the utilization of otherwise sealed and stored reservoirs for hydrogen production. The process not only produces hydrogen but also CO₂, which can be stored underground, contributing to its climate-neutral characteristic. The team's use of advanced simulations to understand hydrogen production behavior underground led to the registration of patents in Germany, marking a significant advancement in research towards post-utilisation technologies for depleted oil reservoirs.