Influence of MoS2 loading on the formation and hydrogenation effect of loaded monolayer molybdenum disulfide

Background Molybdenum disulfide is one of the main catalysts used in slurry-bed reactors. However, monolayer molybdenum disulfide with high hydrogenation activity is extremely difficult to obtain owing to the van der Waals forces between layers. Methods MoTi-X catalysts with different MoS 2 loadings were synthesized using a hydrothermal method. Changes in the active phase of MoTi-X during hydrogenation were also analyzed by TEM, XPS, and Raman spectroscopy. Significant findings MoTi-X catalysts synthesized by a two-step hydrothermal process allowed for the simultaneous generation of monolayer MoS 2 and hydrogenation. The results of the phenanthrene-phenol co-hydrogenation system showed that the different active sites on MoS 2 were responsible for its Hydrogenation and Hydrodeoxygenation properties. Using MoTi-X to catalyze coal tar (CT) hydrogenation, the total content of gasoline and diesel fractions was increased by 11.3 %, which is 3.3 times more effective than industrial four-stage hydrogenation. The average molecular mass, viscosity, and density of the coal tar were reduced by 35 %, 96 %, and 6 %, respectively. The application of MoTi-X catalysts for CT hydrogenation can fill the gap in the research on CT slurry-bed hydrogenation catalysts and improve the competitiveness of enterprises.