Natural gas powered CHP units operate with substantially less emissions than the still dominating energy sources coal and oil. Compared to the conventional seperated generation of power and heat with these fuels, natural gas powered CHP units reduce according to the organization ASUE
Even less CO2 is emitted when CHP units are powered with the renewable fuels biomethane, biogas, sewage gas or „windgas“ (product of the power-to-gas technology). To make best use of these advantages of decentral cogeneration we have equipped our natural gas powered CHP units with catalysts and self-calibrating lambda controls right from the beginning.
At compact CHP units with aspirating engine (GG 50-260) this is implemented with a regulated 3-way catalyst for the lambda=1 operation which reduces the emissions below the values of the tightened 44th BImSchV (BundesImmissionsSchutzVerordnung or Federal Emissions Protection Act) today without changes in the construciton.
For CHP units with turbocharged engine we have developed a solution as early as 2017 to reduce the emissions of nitrogen oxide (NOx) from the then valid limit of 0.5 g/Nm³ to below 0.1 g/Nm³. As a result of this development effort we have exhibited the prototype of the compact CHP unit GG 402 SCR on Hannover Messe 2017. This solution is avaliable for all our CHP units with a turbocharged engine. By equipping the catalyst system inside the CHP unit with an SCR catalyst with accessoires the requested reduction of the NOx emissions is achieved.