CYTOK GmbH, based in Rostock, offers one-stop systems for sustainable energy supply. From needs assessment through concept development, planning, and simulation to installation, commissioning, and maintenance. According to its developers, the patented technology enables the complete self-consumption of self-generated renewable electricity—for example, from PV systems—and is thus designed to ensure maximum independence from energy markets.

Keep it simple

According to the company, what makes the power-to-gas technology from Mecklenburg-Western Pomerania unique is that the patented process combines existing and proven natural gas technology with the sustainability of green electricity as an energy source and hydrogen for storage.

How does this work in practice?

After the PV electricity has been optimally distributed and utilized, any remaining surplus is used in an electrolyzer to split water into hydrogen and oxygen. In the reactors developed by CYTOK, synthetic natural gas is then produced via the so-called Sabatier reaction. There, hydrogen (H2) and carbon dioxide (CO2) react with the aid of a catalyst to form synthetic methane (CH4). This step eliminates both the energy-intensive and costly storage of hydrogen and the reconversion via fuel cells or hydrogen engines.

Instead, proven natural gas technology and existing infrastructure can continue to be utilized, such as pressure tanks or injection into the natural gas grid for storage, as well as proven gas-fired boilers/turbines or combined heat and power plants for combustion.

Emissions-free combustion – CCU at its best

Nevertheless, emissions-free operation is maintained, just as with pure hydrogen systems, since the CO2 produced during the combustion of synthetic methane—also known as SNG—is captured and repeatedly reused in a closed loop to produce SNG. It is introduced into the cycle once and thus remains there permanently.

Pure CO2 is obtained through a process known as oxy-fuel combustion. In this process, the SNG is not burned with oxygen from the ambient air, as in conventional plants, but with pure oxygen—produced free of charge by the electrolyzer. A perfect molecular cycle, according to CYTOK.

Sector coupling and energy management for maximum efficiency

By additionally utilizing process heat for heating, energy losses from conversion are minimized, thereby optimizing cost-effectiveness. Intelligent energy management ensures maximum efficiency of the innovative systems and the highest possible utilization rate of PV electricity, which can reach up to 90 percent.

Best Practice

Since 2020, the reference plant at Bernsteinsee near Gifhorn in Lower Saxony has been demonstrating the functionality and reliability of CYTOK’s technology. The facility supplies several hotel buildings and ancillary facilities with 100 percent green, self-generated energy from its own rooftop PV systems. Additional plants are currently under construction or in the planning stage. Among other projects, the first system will be installed as a container system at the Helmholtz-Zentrum Dresden-Rossendorf e.V. in the course of 2026.

Who should be interested?

Anyone who wants to supply their buildings with clean energy in a sustainable manner, who relies on predictable long-term energy costs, and who wants to fully utilize the PV electricity they generate should contact CYTOK. The Rostock-based company offers solutions for real estate firms, municipal utilities, neighborhood developers, commerce and industry, hotel complexes, local governments, and other application areas. Interested parties are cordially invited to visit the company at the joint booth (Hall 26, Booth B69) of the state of Mecklenburg-Western Pomerania at HANNOVER MESSE 2026.

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