The efficiency of photon-to-biofuel in nature
The efficiency of SolarFuel power-to-gas

Energy storage using nature's example

 

Photosynthesis as a model

In nature, the energy-free raw materials CO2 and water are used to store solar energy: During photosynthesis, plants use sunlight to convert these raw materials into biomass, thus forming chemically stored energy. The efficiency of photon-to-biofuel in nature is less than 0.5 percent.

SolarFuel technology

SolarFuel uses electric power to directly convert the energy-free raw materials CO2 and water into synthetic natural gas: In the first stage of electrolysis, water is separated into hydrogen and oxygen. In the second stage, hydrogen is directly converted into methane (CH4) with CO2. Here, the energy density increases by factor 3, and a marketable and manageable energy source is created which is of standard quality and which can be fed directly into the natural gas grid. The attainable level of efficiency is over 60 percent.

The SolarFuel power-to-gas process enables energy storage close to the thermodynamic optimum.