Facile template-free synthesis of 3D cluster-like nitrogen-doped mesoporous carbon as metal-free catalyst for selective oxidation of H2S

Advances in Resources Recovery of H2S: A Review of Desulfurization Processes and Catalysts

“…Although metal oxide-based catalysts display high activity for catalytic oxidation of H 2 S, they still have some disadvantages such as the requirement of high reaction temperature, low specific surface area, and ease to sulfate. With the rich surface chemistry and large specific surface area, carbon materials are suitable for the desulfurization process. − Table summarizes the catalytic performance of H 2 S removal over diverse carbon-based materials.…”

“…(b) Proposed mechanism H 2 S oxidation over the hierarchically nitrogen-doped carbon. Reproduced with permission from ref . Copyright 2023 Elsevier.…”

“…The well-dispersed Fe-Nχ species provided abundant reactive sites for the conversion of H 2 S. Importantly, no obvious decline of activity was found during the 180 h reaction. After that, Jiang et al further fabricated hierarchical N-doped mesoporous carbon catalysts (HNMCs) by a template-free hydrothermal method (Figure b) . The representative HNMC-800 endowed with abundant nitrogen sites and a large BET surface area achieved a nearly 100% H 2 S conversion and 95% S selectivity at 150 °C for the selective oxidation of H 2 S. In addition, the HNMCs materials were resistant to sulfur poisoning, which displayed high catalytic durability in the run of 80 h.…”

“…Lei and coauthors reported hierarchical N-doped mesoporous carbon (HNMCs) materials with 3D cluster morphology for H 2 S oxidation. 110 The electro-donating ability and surface basicity of the NMCs was improved by the introduction of a high content of N in the carbon matrix. The representative HNMC-800 achieved nearly 100% H 2 S conversion and 95% S selectivity at 150 °C.…”

“…Among the synthesized catalysts, N-OMCS-700 exhibited a maximum S yield of 96% at 140 °C. Lei and coauthors reported hierarchical N-doped mesoporous carbon (HNMCs) materials with 3D cluster morphology for H 2 S oxidation . The electro-donating ability and surface basicity of the NMCs was improved by the introduction of a high content of N in the carbon matrix.…”