The effect of Mo loading on the dispersion of sulfide phase and catalytic activity of MoS 2 /Al 2 O 3 catalysts in the rapeseed HDO was studied. Five catalysts with Mo loading between 10 a nd 16 wt.% were prepared by impregnation of alumina with aqueous solutions containing MoO 3 , H 3 PO 4 and citric acid, subsequent drying and high-pressure sulfidation. HDO activity of the MoS 2 /Al 2 O 3 catalysts was enhanced with the Mo content increase from 10 to 12 wt.% and then was decreased with the further increase of Mo loading. The behavior of MoS 2 /Al 2 O 3 and P-MoS 2 /Al 2 O 3 catalysts with the same Mo loading (near 14 wt.%) was compared in the hydrodeoxygenation of rapeseed oil demonstrating the higher activity of P-promoted system. The modeling of XRD patterns with using of the Debye Function Analysis (DFA) gives the lower d XRD of the MoS 2 particles in the P-MoS 2 /Al 2 O 3 catalyst in comparison with MoS 2 /Al 2 O 3 one. We proposed that P incorporation in the MoS 2 slabs can result in a higher deformation of the supported MoS 2 particles, which in turn could have been a reason of higher activity of P-MoS 2 /Al 2 O 3 catalyst.
|Журнал||WSEAS Transactions on Environment and Development|
|Состояние||Опубликовано - 1 янв 2018|