Mass transfer characteristic of ammonia escape and energy penalty analysis in the regeneration process

The energy penalty and ammonia escape of the regeneration process are the main barriers for the ammonia technology application, so it is of significance for the commercial application to investigate the dominating parameters influencing the ammonia escape and energy consumption performance. A rigorous computational model of the ammonia regeneration process is established, based on which the ammonia regeneration and escape processes can be predicted accurately. The ammonia escape and energy penalty of the regeneration process are studied and the results show that the ammonia escape performance is controlled by the liquid film. The increasing of the liquid inlet temperature, initial ammonia concentration and CO2 loading can reduce the regeneration energy consumption obviously. Especially, the energy consumption of 343.15 K liquid inlet temperature is almost three times to that of 368.15 K liquid inlet temperature. This work can contribute to the ammonia escape inhibition and low energy consumption in the ammonia regeneration process for the industrial application of the ammonia technology.