Efficient control and minimization of emissions from technical processes is of major concern in industrial development and process operation. The technical process in the focus of the present contribution is the nitriding process of metallic specimen. The ammonia content in nitriding process flue gases reaches up to 618 g.m(-3) (80 vol.-%) and needs to be reduced to less than 30 mg.m(-3) (40 ppm) to fulfill present regulations. Exhaust gases from nitriding processes today are burnt in flares without emission control where fuels need to be added that produce additional exhaust gas components. The objective of this investigation is to develop an alternative gas cleaning route for nitriding processes based oil catalytic dissociation of ammonia. The decomposition was studied for different catalysts at varying process conditions. With these results a dissociation pilot plant was successfully tested in a technical-scale nitriding process.