A recently published study by the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) sheds light on the potential of power-to-methanol systems in future renewable energy infrastructures. The research focused on high-temperature electrolysis. Scientists developed a digital twin to explore the possibilities of this technology. The results suggest that power-to-methanol could potentially compete with fossil fuels by 2050.
Methanol as a Key to Energy Storage
In an increasingly renewable energy-oriented system, efficient storage technologies play a crucial role. Methanol could serve as a promising option here. HZDR researchers investigated how power-to-methanol systems could be integrated into renewable infrastructure, both technically and economically.
Dr. Stefan Fogel dedicated his dissertation at HZDR's Institute of Fluid Dynamics to this topic. His extensive modeling and simulations focused on high-temperature electrolysis, which produces pure hydrogen at temperatures above 600°C. This method promises more efficient use of hydrogen in synthesis compared to conventional processes like alkaline electrolysis.
Digital Twin Enables Detailed Analysis
Using a digital twin he developed, Fogel was able to analyze the dynamic behavior of the power-to-methanol system. This is particularly relevant for coupling with fluctuating renewable energy sources. The study shows that flexible process design is possible, allowing power-to-methanol plants to be directly connected to solar or wind power plants and operated under partial load in the future.
Although current production costs for methanol are not yet competitive - mainly due to high investment costs for electrolysis technology - Fogel predicts a significant cost reduction in the coming decades. Through economies of scale and technological advances, power-to-methanol could compete price-wise with fossil fuels by 2050.
Advantages of Methanol as Energy Storage
As an energy storage medium, methanol offers significant advantages over hydrogen, including higher volumetric energy density and easier transport and storage options. It is also an important raw material for the chemical industry.
The integration of power-to-methanol into renewable energy systems could make a substantial contribution to the energy transition by storing surplus electricity and simultaneously utilizing industrial CO₂ emissions. For his outstanding research work, Dr. Stefan Fogel was awarded the Franz Stolze Prize 2024 by TU Dresden in the field of energy technology.
