Untersuchung der Schadstoffemissionen bei der Verbrennung von Treibstoffen in Luftatmosphäre

It was developed and build up an apparatus in laboratory scale to investigate the incineration of propellants by various air-ratios. The apparatus allowed to sample and to analyse the exhaust-gases. Nitrocelluloses (NC) with 13.1 weight-% nitrogen was used as model-substance. Flame temperatures were measured under various air-ratios. It was determined a maximum flame temperature of 1900 K. The exhaust-gases showed very high emissions of NOsubx they are high above the thermodynamic equilibrium. Lowest NOsubx-emissions were found at the range about the stoichiometric air-ratio corresponding to the highest temperatures, therefore, to achieve best primery NOsubx reduction is the thermodynamic equilibrium concentration at the corresponding temperature. Additionally NC was mixed with urea (mol-ratio: urea:nitrocelluloses is equal 1.3:1), which caused a 50% NOsubx reduction. This mixtures showed maximum flame temperatures of about 1300 K correspondent to an air ratio of 1.6