Advances in nitrogen-rich carbon catalysts for selective catalytic oxidation of H2S
In recent years,selective catalytic oxidation(H2S-SCO)technology,which can efficiently purify H2S and recover sulfur resources,has received much attention.Research on the development of high-performance,high-selective,and low-cost catalysts is the focus of H2S-SCO technology,among which the nitrogen-rich carbon-based catalysts(RNCCs),which have the advantages of high activity,metal-free,easy-to-prepare,low cost,and easy to be regenerated,are considered as a class of highly promising catalysts for H2S-SCO.In this article,the development of metal-based catalysts is introduced,the preparation method,catalytic activity,and physical-chemical properties of RNCC are summarized and generalized,the structure-efficacy relationship of RNCC and the key factors affecting the performance of RNCC are systematically discussed,and the H2S-SCO reaction mechanism of RNCC is concluded.Finally,the current opportunities and challenges of RNCC are also pointed out,and the future development direction is envisioned.
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