The current Auxiliary Power Units (APUs) in transport aviation run on kerosene (= an upgraded diesel fuel) is also made suitable for operation under varying atmospheric conditions – air pressure and temperature and high-reliability fuses) from the tanks of the aircraft and consumes an average of 150 liters per hour, with also high noxious emissions as a result. Hydrogen, as zero emission energy fuel is stored in sodium borohydride in a composite fuel tank and mixed with pure water.  During this research our existing retrofitted APU engine is connected to the separate sodium borihydride hydrogen tank in the belly of the aircraft. The APU, retrofitted with two injection ports, one for use of kerosene and one injection port for use of Hydrogen can then use Hydrogen while taxiing on the ground after landing and before takeoff.  CTA has conducted scientific research on the International Airport of Amsterdam. The average number of aircrafts taxiing 15-20 minutes produce annually Co2 emissions of 7,5 million houses with 500m3 volume only from the APU engine. That is the total housing area of the Netherlands!

The emission reduction targets to be reached in 2030 by 30% and 50 % by 2050 for the transport aviation airlines  are brought within reach when applying this disruptive and sustainable solution!