Conventional combined heat and power plants work with gas engines, which have a low efficiency of maximum 40%. Today’s fuel cell power plants achieve a somewhat higher efficiency of about 50-60% but can only use about 70% of the biogas used, because the gas must be supplied in excess to protect the fuel cells and the unused excess gas must be burnt.
Reverion plants regenerate the used biogas and return it to the fuel cells. Through this cycle, 100% of the biogas used can be utilised and an efficiency of 80% can be achieved. A post combustion of the exhaust gas is therefore not necessary. An SCR catalytic converter for after-treatment of the exhaust gas, as required in combined heat and power plants, is also no longer necessary.