Abstract: Compared to conventional desulfurization amine solvents, sterically hindered amines exhibit higher acid gas absorption capacity, stronger selectivity, as well as lower corrosiveness and foaming tendency. However, their high synthesis cost limits widespread application. The mechanism through which sterically hindered amines selectively remove hydrogen sulfide by suppressing carbon dioxide reactions via their unique spatial structure is introduced. The synthesis methods of sterically hindered amines are discussed, with particular emphasis on research progress and challenges in halogenation and catalytic amination approaches. The applications combining sterically hindered amine-based composite desulfurizers with process intensification techniques to improve desulfurization performance are also presented. Analysis suggests that future research should focus on: in-depth investigation of catalytic amination reaction mechanisms, development of efficient catalysts, and integration of novel desulfurization processes to facilitate broader application of sterically hindered amines in green desulfurization technologies.

Key words: sterically hindered amine, selective desulfurization, halogenation method, catalytic amination, non-noble metal catalyst