What is biogas and how can it be used?
The raw material for biomethane is biogas, which is gained in agricultural facilities, mainly by the fermentation of manure and maize silage. Gaseous energy sources are more difficult to store and transport than liquid fuels. Biogas requires more storage space due to its substantially lower energy density. In natural gas vehicles, the methane must be stored in specially installed pressure tanks at a pressure of 200 bar. However, these fundamental disadvantages are offset by positive combustion properties and reduced toxic emissions. Vehicles which use a gaseous energy source in place of a liquid already exist: they run on natural gas. Natural gas vehicles are now supplied as standard models by many automotive manufacturers. Biomethane from biogas can be used in these vehicles without further technical adjustments. However, the corresponding treatment processes for biogas to reach the quality of natural gas are relatively new and therefore connected with high costs. In several countries
