Oxidative Desulfurization Catalyzed by Phosphotungstic Acid Supported on Hierarchical Porous Carbons

A hierarchical porous carbon material (HPC) with an ultra-high specific surface area was synthesized with sisal fiber (SF) as a precursor, and then H3PW12O40 center dot 24H(2)O (HPW) was immobilized on the support of SF-HPC by a simple impregnation method. A series characterization technology approved that the obtained SF-HPC had a high surface area of 3152.46 m(2)g(-1) with micropores and macropores. HPW was well-dispersed on the surface of the SF-HPC support, which reduced the loading of HPW to as low as 5%. HPW/SF-HPW showed excellent catalytic performance for oxidative desulfurization, and the desulfurization rate reached almost 100% under the optimal reaction conditions. The desulfurization rate of HPW/SF-HPW could be maintained at above 94% after four recycles.

Automated summary

A hierarchical porous carbon material (HPC) with ultra-high specific surface area was synthesized using sisal fiber (SF) as a precursor, and HPW catalyst was successfully immobilized on the support of SF-HPC. Characterization showed that the material had high surface area, micropores, and macropores, with HPW well-dispersed on the surface, leading to excellent catalytic performance. The desulfurization rate reached nearly 100% under optimal conditions and remained above 94% after four cycles.