Umweltverträglichkeit biogasbetriebener Blockheizkraftwerke in der Praxis
2008
Six biogas powered CHPU’s were tested at agricultural biogas plants. NOx exhaust gas limits were usually exceeded under full-load operations. It was only possible to stay below those limits by lowering efficiency levels and simultaneously increasing the percentage of unburned carbon hydrogen (CnHm) in the exhaust gas. There was a direct relationship between the reduction of NOx concentration and the level of carbon hydrogen exhaust. For climate-saving and at the same time efficient energetic utilization of biogas in combustion engines, further measures must taken to reduce the increased NOx concentrations in the exhaust gas.
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