One of the biggest challenges in facing up the climate crisis is the transition to CO2 free energy supply making it green and safe. For energetic sector, responsible for electricity and heat generation, the need for alternative fuel is highly demand. The fossil fuels must be replaced with sustainable, renewable and carbon free energy sources, e.g., a promising carbon free fuel is ammonia (NH3). It is considered as a chemical storage medium for hydrogen that can be easily stored and transported. Ammonia has the potential to play a key role in managing energy grids integrated with intermittent and renewable sources by providing a solution to store energy. As a source of heat and electricity for small and medium application can be seen in application of the internal combustion engine powered by ammonia. In presentation the possible ammonia application will be demonstrated. Moreover, experimental founding will be discussed to show potential of ammonia application. The goal of this work will be also demonstration of ammonia application for powering Ci and SI engines.