Natural gas is a gas which is largely composed of methane. It is extracted from underground deposits, mostly together with crude oil, and features a methane content of about 80 to 99 percent depending on the composition. Further constituents include ethane, propane, butane and ethene as well as carbon dioxide and nitrogen. Depending on the composition, the usable heat value varies from 9.5 to 10.5 kWh / Nm3; natural gas is therefore ideally suited as a fuel for gas engines.
At present, natural gas is one of the most important energy sources. Demand is growing and fossil fuels are becoming more valuable. Rising natural gas prices and environmental needs require the highest efficiency in converting energy into hot and cold spots. Today, efficient power plants and cogeneration plants are running on natural gas.