Ammonia will play an important role as energy carrier in a future hydrogen economy. The biggest hurdle to overcome is the geographical distance between renewable-rich locations and consumer countries. Thereby hydrogen transport is a challenge. The safe and proven alternative to transport large quantities of hydrogen is shipping it in the form of hydrogen embedded in the ammonia molecule. In this case, the shipped ammonia has to be converted back to hydrogen at the point of destination for further use.
The presentation describes the technical options for the ammonia decomposition process and their energy efficiency and CO2 intensity which – among others – also depend on the selection of the heat source. Furthermore, the pros and cons of centralized and localized hydrogen production are discussed.