A Mini-Review on NH3 Separation Technologies: Recent Advances and Future Directions

NH3 has been recognized as a future carrier of energy considering its high content of H. It can be combusted directly, or decomposed on-site to release H2. For the application of NH3 as an energy carrier, the efficient separation of NH3 is an important task. So far, many technologies such as physical condensation, liquid absorption, solid adsorption, and membrane separation are available for the separation of NH3. Recently, the integration of physical condensation and solid adsorption was also proposed for the separation of NH3, to simultaneously utilize the advantages of both technologies. However, an up-to-date review providing an overall description of NH3 separation technologies is still absent. In this mini-review, we briefly summarized the recent advances in NH3 separation technologies, and mainly discussed the publications in the past five years. First, we sequentially introduced physical condensation, liquid absorption, solid adsorption, membrane separation, and integration technologies. Then, the future directions for the development of NH3 separation technologies were analyzed.