In-Situ Sulfurization Synthesis of Three-Dimensional Porous CoMoS/CMF Catalysts for Thiophene Hydrodesulfurization
摘要
The catalyst microstructure significantly impacts the corresponding hydrodesulfurization (HDS) performance. In this study, the carbon sponge (CMF) derived from melamine foam was used as support to prepare a series of pre-sulfurized CoMoS/CMF catalysts with different Co/Mo molar ratios using hydrothermal synthesis. The characterization results from SEM, TEM, XRD, and N2 physisorption revealed that all catalysts exhibit the three-dimensional porous (3DP) structure, where the metal sulfides with uneven ravines coated the CMF framework. The optimized Co2.0MoS/CMF catalyst achieved 99.2% thiophene conversion at 1 MPa and 360 °C during HDS test. The interconnected pores facilitated the reactant/product diffusion in the catalyst. Moreover, the highly dispersed MoS2 provided abundant active sites, leading to enhanced HDS activity. This study demonstrates the promise of CMF support for developing pre-sulfurized catalysts with enhanced HDS activity.
Graphical Abstract